update headless dev command

# Conflicts:
#	core/src/main/java/com/volmit/iris/core/commands/CommandDeveloper.java
#	core/src/main/java/com/volmit/iris/core/commands/CommandIris.java
#	core/src/main/java/com/volmit/iris/core/nms/v1X/NMSBinding1X.java
#	core/src/main/java/com/volmit/iris/core/tools/IrisPackBenchmarking.java
#	nms/v1_20_R1/src/main/java/com/volmit/iris/core/nms/v1_20_R1/NMSBinding.java
#	nms/v1_20_R2/src/main/java/com/volmit/iris/core/nms/v1_20_R2/NMSBinding.java
#	nms/v1_20_R3/src/main/java/com/volmit/iris/core/nms/v1_20_R3/NMSBinding.java
#	nms/v1_20_R4/src/main/java/com/volmit/iris/core/nms/v1_20_R4/NMSBinding.java
#	nms/v1_21_R1/src/main/java/com/volmit/iris/core/nms/v1_21_R1/NMSBinding.java
#	nms/v1_21_R2/src/main/java/com/volmit/iris/core/nms/v1_21_R2/NMSBinding.java
#	nms/v1_21_R3/src/main/java/com/volmit/iris/core/nms/v1_21_R3/NMSBinding.java

README.md

@@ -15,17 +15,17 @@ Consider supporting our development by buying Iris on spigot! We work hard to ma
 
 ### Command Line Builds
 
-1. Install [Java JDK 17](https://www.oracle.com/java/technologies/javase/jdk17-archive-downloads.html)
+1. Install [Java JDK 21](https://www.oracle.com/java/technologies/javase/jdk21-archive-downloads.html)
 2. Set the JDK installation path to `JAVA_HOME` as an environment variable.
     * Windows
         1. Start > Type `env` and press Enter
         2. Advanced > Environment Variables
         3. Under System Variables, click `New...`
         4. Variable Name: `JAVA_HOME`
-        5. Variable Value: `C:\Program Files\Java\jdk-17.0.1` (verify this exists after installing java don't just copy
+        5. Variable Value: `C:\Program Files\Java\jdk-21.0.1` (verify this exists after installing java don't just copy
            the example text)
     * MacOS
-        1. Run `/usr/libexec/java_home -V` and look for Java 17
+        1. Run `/usr/libexec/java_home -V` and look for Java 21
         2. Run `sudo nano ~/.zshenv`
         3. Add `export JAVA_HOME=$(/usr/libexec/java_home)` as a new line
         4. Use `CTRL + X`, then Press `Y`, Then `ENTER`
@@ -35,7 +35,7 @@ Consider supporting our development by buying Iris on spigot! We work hard to ma
 
 ### IDE Builds (for development)
 
-* Configure ITJ Gradle to use JDK 17 (in settings, search for gradle)
+* Configure ITJ Gradle to use JDK 21 (in settings, search for gradle)
 * Add a build line in the build.gradle for your own build task to directly compile Iris into your plugins folder if you
   prefer.
 * Resync the project & run your newly created task (under the development folder in gradle tasks!)

build.gradle

@@ -32,7 +32,8 @@ plugins {
     id "de.undercouch.download" version "5.0.1"
 }
 
-version '3.5.3-1.19.2-1.21.3'
+
+version '3.6.5-1.20.1-1.21.4'
 
 // ADD YOURSELF AS A NEW LINE IF YOU WANT YOUR OWN BUILD TASK GENERATED
 // ======================== WINDOWS =============================
@@ -53,15 +54,13 @@ registerCustomOutputTaskUnix('CrazyDev22LT', '/home/julian/Desktop/server/plugin
 // ==============================================================
 
 def NMS_BINDINGS = Map.of(
+        "v1_21_R3", "1.21.4-R0.1-SNAPSHOT",
         "v1_21_R2", "1.21.3-R0.1-SNAPSHOT",
         "v1_21_R1", "1.21.1-R0.1-SNAPSHOT",
         "v1_20_R4", "1.20.6-R0.1-SNAPSHOT",
         "v1_20_R3", "1.20.4-R0.1-SNAPSHOT",
         "v1_20_R2", "1.20.2-R0.1-SNAPSHOT",
         "v1_20_R1", "1.20.1-R0.1-SNAPSHOT",
-        "v1_19_R3", "1.19.4-R0.1-SNAPSHOT",
-        "v1_19_R2", "1.19.3-R0.1-SNAPSHOT",
-        "v1_19_R1", "1.19.2-R0.1-SNAPSHOT"
 )
 def JVM_VERSION = Map.of()
 NMS_BINDINGS.each { nms ->
@@ -93,6 +92,11 @@ shadowJar {
     relocate 'net.kyori', 'com.volmit.iris.util.kyori'
     relocate 'org.bstats', 'com.volmit.util.metrics'
     archiveFileName.set("Iris-${project.version}.jar")
+
+    dependencies {
+        exclude(dependency("org.ow2.asm:asm:"))
+        exclude(dependency("org.jetbrains:"))
+    }
 }
 
 dependencies {
@@ -129,7 +133,7 @@ allprojects {
         annotationProcessor 'org.projectlombok:lombok:1.18.36'
 
         // Shaded
-        implementation 'com.dfsek:Paralithic:0.4.0'
+        implementation 'com.dfsek:paralithic:0.8.1'
         implementation 'io.papermc:paperlib:1.0.5'
         implementation "net.kyori:adventure-text-minimessage:4.17.0"
         implementation 'net.kyori:adventure-platform-bukkit:4.3.4'

core/build.gradle

@@ -62,7 +62,7 @@ dependencies {
 
     // Third Party Integrations
     compileOnly 'com.ticxo.playeranimator:PlayerAnimator:R1.2.7'
-    compileOnly 'com.nexomc:nexo:0.6.0-dev.0'
+    compileOnly 'com.nexomc:nexo:1.0.0-dev.38'
     compileOnly 'com.github.LoneDev6:api-itemsadder:3.4.1-r4'
     compileOnly 'com.github.PlaceholderAPI:placeholderapi:2.11.3'
     compileOnly 'com.github.Ssomar-Developement:SCore:4.23.10.8'

core/src/main/java/com/volmit/iris/Iris.java

@@ -32,8 +32,10 @@ import com.volmit.iris.core.nms.v1X.NMSBinding1X;
 import com.volmit.iris.core.pregenerator.LazyPregenerator;
 import com.volmit.iris.core.service.StudioSVC;
 import com.volmit.iris.core.tools.IrisToolbelt;
+import com.volmit.iris.core.tools.IrisWorldCreator;
 import com.volmit.iris.engine.EnginePanic;
 import com.volmit.iris.engine.object.IrisCompat;
+import com.volmit.iris.engine.object.IrisContextInjector;
 import com.volmit.iris.engine.object.IrisDimension;
 import com.volmit.iris.engine.object.IrisWorld;
 import com.volmit.iris.engine.platform.BukkitChunkGenerator;
@@ -101,8 +103,6 @@ import static com.volmit.iris.core.safeguard.ServerBootSFG.passedserversoftware;
 
 @SuppressWarnings("CanBeFinal")
 public class Iris extends VolmitPlugin implements Listener {
-    public static final String OVERWORLD_TAG = "31000";
-
     private static final Queue<Runnable> syncJobs = new ShurikenQueue<>();
 
     public static Iris instance;
@@ -459,9 +459,12 @@ public class Iris extends VolmitPlugin implements Listener {
         initialize("com.volmit.iris.core.service").forEach((i) -> services.put((Class<? extends IrisService>) i.getClass(), (IrisService) i));
         INMS.get();
         IO.delete(new File("iris"));
+        compat = IrisCompat.configured(getDataFile("compat.json"));
+        ServerConfigurator.configure();
+        new IrisContextInjector();
         IrisSafeguard.IrisSafeguardSystem();
         getSender().setTag(getTag());
-        compat = IrisCompat.configured(getDataFile("compat.json"));
+        IrisSafeguard.earlySplash();
         linkMultiverseCore = new MultiverseCoreLink();
         linkMythicMobs = new MythicMobsLink();
         configWatcher = new FileWatcher(getDataFile("settings.json"));
@@ -516,10 +519,10 @@ public class Iris extends VolmitPlugin implements Listener {
                 Iris.info("Loading World: %s | Generator: %s", s, generator);
 
                 Iris.info(C.LIGHT_PURPLE + "Preparing Spawn for " + s + "' using Iris:" + generator + "...");
-                new WorldCreator(s)
+                WorldCreator c = new WorldCreator(s)
                         .generator(getDefaultWorldGenerator(s, generator))
-                        .environment(IrisData.loadAnyDimension(generator).getEnvironment())
-                        .createWorld();
+                        .environment(IrisData.loadAnyDimension(generator).getEnvironment());
+                INMS.get().createWorld(c);
                 Iris.info(C.LIGHT_PURPLE + "Loaded " + s + "!");
             }
         } catch (Throwable e) {
@@ -672,10 +675,12 @@ public class Iris extends VolmitPlugin implements Listener {
                 metrics.addCustomChart(new DrilldownPie("used_packs", () -> Bukkit.getWorlds().stream()
                         .map(IrisToolbelt::access)
                         .filter(Objects::nonNull)
-                        .map(PlatformChunkGenerator::getTarget)
-                        .collect(Collectors.toMap(target -> target.getDimension().getLoadKey(), target -> {
-                            int version = target.getDimension().getVersion();
-                            String checksum = IO.hashRecursive(target.getData().getDataFolder());
+                        .map(PlatformChunkGenerator::getEngine)
+                        .collect(Collectors.toMap(engine -> engine.getDimension().getLoadKey(), engine -> {
+                            var hash32 = engine.getHash32().getNow(null);
+                            if (hash32 == null) return Map.of();
+                            int version = engine.getDimension().getVersion();
+                            String checksum = Long.toHexString(hash32);
 
                             return Map.of("v" + version + " (" + checksum + ")", 1);
                         }, (a, b) -> {
@@ -777,7 +782,7 @@ public class Iris extends VolmitPlugin implements Listener {
             service(StudioSVC.class).installIntoWorld(getSender(), dim.getLoadKey(), w.worldFolder());
         }
 
-        return new BukkitChunkGenerator(w, false, ff, dim.getLoadKey(), false);
+        return new BukkitChunkGenerator(w, false, ff, dim.getLoadKey());
     }
 
     public void splash() {

core/src/main/java/com/volmit/iris/core/IrisSettings.java

@@ -181,6 +181,7 @@ public class IrisSettings {
         public boolean splashLogoStartup = true;
         public boolean useConsoleCustomColors = true;
         public boolean useCustomColorsIngame = true;
+        public boolean adjustVanillaHeight = false;
         public String forceMainWorld = "";
         public int spinh = -20;
         public int spins = 7;

core/src/main/java/com/volmit/iris/core/ServerConfigurator.java

@@ -28,20 +28,28 @@ import com.volmit.iris.engine.object.IrisBiomeCustom;
 import com.volmit.iris.engine.object.IrisDimension;
 import com.volmit.iris.engine.object.IrisRange;
 import com.volmit.iris.util.collection.KList;
+import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.collection.KSet;
 import com.volmit.iris.util.format.C;
+import com.volmit.iris.util.misc.ServerProperties;
 import com.volmit.iris.util.plugin.VolmitSender;
 import com.volmit.iris.util.scheduling.J;
+import lombok.Data;
+import lombok.NonNull;
 import org.bukkit.Bukkit;
 import org.bukkit.configuration.InvalidConfigurationException;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.Nullable;
 
 import java.io.File;
 import java.io.IOException;
-import java.util.List;
+import java.util.Arrays;
 import java.util.concurrent.TimeUnit;
+import java.util.stream.Stream;
+
+import static com.volmit.iris.core.nms.datapack.IDataFixer.Dimension.*;
 
 public class ServerConfigurator {
     public static void configure() {
@@ -84,12 +92,13 @@ public class ServerConfigurator {
         }
     }
 
-    private static List<File> getDatapacksFolder() {
+    private static KList<File> getDatapacksFolder() {
         if (!IrisSettings.get().getGeneral().forceMainWorld.isEmpty()) {
             return new KList<File>().qadd(new File(Bukkit.getWorldContainer(), IrisSettings.get().getGeneral().forceMainWorld + "/datapacks"));
         }
         KList<File> worlds = new KList<>();
         Bukkit.getServer().getWorlds().forEach(w -> worlds.add(new File(w.getWorldFolder(), "datapacks")));
+        if (worlds.isEmpty()) worlds.add(new File(Bukkit.getWorldContainer(), ServerProperties.LEVEL_NAME + "/datapacks"));
         return worlds;
     }
 
@@ -99,57 +108,17 @@ public class ServerConfigurator {
 
     public static void installDataPacks(IDataFixer fixer, boolean fullInstall) {
         Iris.info("Checking Data Packs...");
-        File packs = new File("plugins/Iris/packs");
-        double ultimateMaxHeight = 0;
-        double ultimateMinHeight = 0;
-        if (packs.exists() && packs.isDirectory()) {
-            for (File pack : packs.listFiles()) {
-                IrisData data = IrisData.get(pack);
-                if (pack.isDirectory()) {
-                    File dimensionsFolder = new File(pack, "dimensions");
-                    if (dimensionsFolder.exists() && dimensionsFolder.isDirectory()) {
-                        for (File file : dimensionsFolder.listFiles()) {
-                            if (file.isFile() && file.getName().endsWith(".json")) {
-                                IrisDimension dim = data.getDimensionLoader().load(file.getName().split("\\Q.\\E")[0]);
-                                if (ultimateMaxHeight < dim.getDimensionHeight().getMax()) {
-                                    ultimateMaxHeight = dim.getDimensionHeight().getMax();
-                                }
-                                if (ultimateMinHeight > dim.getDimensionHeight().getMin()) {
-                                    ultimateMinHeight = dim.getDimensionHeight().getMin();
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-        }
+        DimensionHeight height = new DimensionHeight(fixer);
+        KList<File> folders = getDatapacksFolder();
+        KMap<String, KSet<String>> biomes = new KMap<>();
 
-        if (packs.exists()) {
-            for (File i : packs.listFiles()) {
-                if (i.isDirectory()) {
-                    Iris.verbose("Checking Pack: " + i.getPath());
-                    IrisData data = IrisData.get(i);
-                    File dims = new File(i, "dimensions");
-
-                    if (dims.exists()) {
-                        for (File j : dims.listFiles()) {
-                            if (j.getName().endsWith(".json")) {
-                                IrisDimension dim = data.getDimensionLoader().load(j.getName().split("\\Q.\\E")[0]);
-
-                                if (dim == null) {
-                                    continue;
-                                }
-
-                                Iris.verbose("  Checking Dimension " + dim.getLoadFile().getPath());
-                                for (File dpack : getDatapacksFolder()) {
-                                    dim.installDataPack(fixer, () -> data, dpack, ultimateMaxHeight, ultimateMinHeight);
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-        }
+        allPacks().flatMap(height::merge)
+                .parallel()
+                .forEach(dim -> {
+                    Iris.verbose("  Checking Dimension " + dim.getLoadFile().getPath());
+                    dim.installBiomes(fixer, dim::getLoader, folders, biomes.computeIfAbsent(dim.getLoadKey(), k -> new KSet<>()));
+                });
+        IrisDimension.writeShared(folders, height);
 
         Iris.info("Data Packs Setup!");
 
@@ -158,57 +127,40 @@ public class ServerConfigurator {
     }
 
     private static void verifyDataPacksPost(boolean allowRestarting) {
-        File packs = new File("plugins/Iris/packs");
+        boolean bad = allPacks()
+                .map(data -> {
+                    Iris.verbose("Checking Pack: " + data.getDataFolder().getPath());
+                    var loader = data.getDimensionLoader();
+                    return loader.loadAll(loader.getPossibleKeys())
+                            .stream()
+                            .map(ServerConfigurator::verifyDataPackInstalled)
+                            .toList()
+                            .contains(false);
+                })
+                .toList()
+                .contains(true);
+        if (!bad) return;
 
-        boolean bad = false;
-        if (packs.exists()) {
-            for (File i : packs.listFiles()) {
-                if (i.isDirectory()) {
-                    Iris.verbose("Checking Pack: " + i.getPath());
-                    IrisData data = IrisData.get(i);
-                    File dims = new File(i, "dimensions");
 
-                    if (dims.exists()) {
-                        for (File j : dims.listFiles()) {
-                            if (j.getName().endsWith(".json")) {
-                                IrisDimension dim = data.getDimensionLoader().load(j.getName().split("\\Q.\\E")[0]);
+        if (allowRestarting) {
+            restart();
+        } else if (INMS.get().supportsDataPacks()) {
+            Iris.error("============================================================================");
+            Iris.error(C.ITALIC + "You need to restart your server to properly generate custom biomes.");
+            Iris.error(C.ITALIC + "By continuing, Iris will use backup biomes in place of the custom biomes.");
+            Iris.error("----------------------------------------------------------------------------");
+            Iris.error(C.UNDERLINE + "IT IS HIGHLY RECOMMENDED YOU RESTART THE SERVER BEFORE GENERATING!");
+            Iris.error("============================================================================");
 
-                                if (dim == null) {
-                                    Iris.error("Failed to load " + j.getPath() + " ");
-                                    continue;
-                                }
-
-                                if (!verifyDataPackInstalled(dim)) {
-                                    bad = true;
-                                }
-                            }
-                        }
-                    }
+            for (Player i : Bukkit.getOnlinePlayers()) {
+                if (i.isOp() || i.hasPermission("iris.all")) {
+                    VolmitSender sender = new VolmitSender(i, Iris.instance.getTag("WARNING"));
+                    sender.sendMessage("There are some Iris Packs that have custom biomes in them");
+                    sender.sendMessage("You need to restart your server to use these packs.");
                 }
             }
-        }
 
-        if (bad) {
-            if (allowRestarting) {
-                restart();
-            } else if (INMS.get().supportsDataPacks()) {
-                Iris.error("============================================================================");
-                Iris.error(C.ITALIC + "You need to restart your server to properly generate custom biomes.");
-                Iris.error(C.ITALIC + "By continuing, Iris will use backup biomes in place of the custom biomes.");
-                Iris.error("----------------------------------------------------------------------------");
-                Iris.error(C.UNDERLINE + "IT IS HIGHLY RECOMMENDED YOU RESTART THE SERVER BEFORE GENERATING!");
-                Iris.error("============================================================================");
-
-                for (Player i : Bukkit.getOnlinePlayers()) {
-                    if (i.isOp() || i.hasPermission("iris.all")) {
-                        VolmitSender sender = new VolmitSender(i, Iris.instance.getTag("WARNING"));
-                        sender.sendMessage("There are some Iris Packs that have custom biomes in them");
-                        sender.sendMessage("You need to restart your server to use these packs.");
-                    }
-                }
-
-                J.sleep(3000);
-            }
+            J.sleep(3000);
         }
     }
 
@@ -218,7 +170,7 @@ public class ServerConfigurator {
             Iris.warn("This will only happen when your pack changes (updates/first time setup)");
             Iris.warn("(You can disable this auto restart in iris settings)");
             J.s(() -> {
-                Iris.warn("Looks like the restart command diddn't work. Stopping the server instead!");
+                Iris.warn("Looks like the restart command didn't work. Stopping the server instead!");
                 Bukkit.shutdown();
             }, 100);
             Bukkit.dispatchCommand(Bukkit.getConsoleSender(), "restart");
@@ -226,22 +178,24 @@ public class ServerConfigurator {
     }
 
     public static boolean verifyDataPackInstalled(IrisDimension dimension) {
-        IrisData idm = IrisData.get(Iris.instance.getDataFolder("packs", dimension.getLoadKey()));
         KSet<String> keys = new KSet<>();
         boolean warn = false;
 
-        for (IrisBiome i : dimension.getAllBiomes(() -> idm)) {
+        for (IrisBiome i : dimension.getAllBiomes(dimension::getLoader)) {
             if (i.isCustom()) {
                 for (IrisBiomeCustom j : i.getCustomDerivitives()) {
                     keys.add(dimension.getLoadKey() + ":" + j.getId());
                 }
             }
         }
+        String key = getWorld(dimension.getLoader());
+        if (key == null) key = dimension.getLoadKey();
+        else key += "/" + dimension.getLoadKey();
 
         if (!INMS.get().supportsDataPacks()) {
             if (!keys.isEmpty()) {
                 Iris.warn("===================================================================================");
-                Iris.warn("Pack " + dimension.getLoadKey() + " has " + keys.size() + " custom biome(s). ");
+                Iris.warn("Pack " + key + " has " + keys.size() + " custom biome(s). ");
                 Iris.warn("Your server version does not yet support datapacks for iris.");
                 Iris.warn("The world will generate these biomes as backup biomes.");
                 Iris.warn("====================================================================================");
@@ -260,10 +214,74 @@ public class ServerConfigurator {
         }
 
         if (warn) {
-            Iris.error("The Pack " + dimension.getLoadKey() + " is INCAPABLE of generating custom biomes");
+            Iris.error("The Pack " + key + " is INCAPABLE of generating custom biomes");
             Iris.error("If not done automatically, restart your server before generating with this pack!");
         }
 
         return !warn;
     }
+
+    public static Stream<IrisData> allPacks() {
+        return Stream.concat(listFiles(new File("plugins/Iris/packs")),
+                        listFiles(Bukkit.getWorldContainer()).map(w -> new File(w, "iris/pack")))
+                .filter(File::isDirectory)
+                .map(IrisData::get);
+    }
+
+    @Nullable
+    public static String getWorld(@NonNull IrisData data) {
+        String worldContainer = Bukkit.getWorldContainer().getAbsolutePath();
+        if (!worldContainer.endsWith(File.separator)) worldContainer += File.separator;
+        
+        String path = data.getDataFolder().getAbsolutePath();
+        if (!path.startsWith(worldContainer)) return null;
+        int l = path.endsWith(File.separator) ? 11 : 10;
+        return path.substring(worldContainer.length(), path.length() - l);
+    }
+
+    private static Stream<File> listFiles(File parent) {
+        var files = parent.listFiles();
+        return files == null ? Stream.empty() : Arrays.stream(files);
+    }
+
+    @Data
+    public static class DimensionHeight {
+        private final IDataFixer fixer;
+        private IrisRange overworld = new IrisRange();
+        private IrisRange nether = new IrisRange();
+        private IrisRange end = new IrisRange();
+        private int logicalOverworld = 0;
+        private int logicalNether = 0;
+        private int logicalEnd = 0;
+
+        public Stream<IrisDimension> merge(IrisData data) {
+            Iris.verbose("Checking Pack: " + data.getDataFolder().getPath());
+            var loader = data.getDimensionLoader();
+            return loader.loadAll(loader.getPossibleKeys())
+                    .stream()
+                    .peek(this::merge);
+        }
+
+        public void merge(IrisDimension dimension) {
+            overworld.merge(dimension.getDimensionHeight());
+            nether.merge(dimension.getDimensionHeight());
+            end.merge(dimension.getDimensionHeight());
+
+            logicalOverworld = Math.max(logicalOverworld, dimension.getLogicalHeight());
+            logicalNether = Math.max(logicalNether, dimension.getLogicalHeightNether());
+            logicalEnd = Math.max(logicalEnd, dimension.getLogicalHeightEnd());
+        }
+
+        public String overworldType() {
+            return fixer.createDimension(OVERRWORLD, overworld, logicalOverworld).toString(4);
+        }
+
+        public String netherType() {
+            return fixer.createDimension(NETHER, nether, logicalNether).toString(4);
+        }
+
+        public String endType() {
+            return fixer.createDimension(THE_END, end, logicalEnd).toString(4);
+        }
+    }
 }

core/src/main/java/com/volmit/iris/core/commands/CommandDeveloper.java

@@ -22,11 +22,14 @@ import com.volmit.iris.Iris;
 import com.volmit.iris.core.ServerConfigurator;
 import com.volmit.iris.core.loader.IrisData;
 import com.volmit.iris.core.nms.datapack.DataVersion;
+import com.volmit.iris.core.pregenerator.PregenTask;
+import com.volmit.iris.core.pregenerator.methods.HeadlessPregenMethod;
 import com.volmit.iris.core.service.IrisEngineSVC;
 import com.volmit.iris.core.tools.IrisPackBenchmarking;
 import com.volmit.iris.core.tools.IrisToolbelt;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.object.IrisDimension;
+import com.volmit.iris.engine.platform.PlatformChunkGenerator;
 import com.volmit.iris.util.decree.DecreeExecutor;
 import com.volmit.iris.util.decree.DecreeOrigin;
 import com.volmit.iris.util.decree.annotations.Decree;
@@ -36,6 +39,7 @@ import com.volmit.iris.util.format.Form;
 import com.volmit.iris.util.io.CountingDataInputStream;
 import com.volmit.iris.util.io.IO;
 import com.volmit.iris.util.mantle.TectonicPlate;
+import com.volmit.iris.util.math.Position2;
 import com.volmit.iris.util.nbt.mca.MCAFile;
 import com.volmit.iris.util.nbt.mca.MCAUtil;
 import com.volmit.iris.util.parallel.MultiBurst;
@@ -48,6 +52,7 @@ import org.apache.commons.lang.RandomStringUtils;
 import org.bukkit.Bukkit;
 import org.bukkit.Chunk;
 import org.bukkit.World;
+import org.bukkit.util.Vector;
 
 import java.io.*;
 import java.net.InetAddress;
@@ -140,12 +145,16 @@ public class CommandDeveloper implements DecreeExecutor {
     public void packBenchmark(
             @Param(description = "The pack to bench", aliases = {"pack"}, defaultValue = "overworld")
             IrisDimension dimension,
-            @Param(description = "Radius in regions", defaultValue = "5")
-            int radius,
+            @Param(description = "Diameter in regions", defaultValue = "2048")
+            int diameter,
+            @Param(description = "Headless", defaultValue = "true")
+            boolean headless,
             @Param(description = "Open GUI while benchmarking", defaultValue = "false")
             boolean gui
     ) {
-        new IrisPackBenchmarking(dimension, radius, gui);
+        int rb = diameter << 9;
+        Iris.info("Benchmarking pack " + dimension.getName() + " with diameter: " + rb + "(" + diameter + ")");
+        new IrisPackBenchmarking(dimension, diameter, headless, gui);
     }
 
     @Decree(description = "Upgrade to another Minecraft version")
@@ -213,6 +222,42 @@ public class CommandDeveloper implements DecreeExecutor {
         sender.sendMessage(C.RED + "Failed to load " + failed.get() + " of " + keys.length + " objects");
     }
 
+    @Decree(description = "Pregenerate a world")
+    public void headless(
+            @Param(description = "The radius of the pregen in blocks", aliases = "size")
+            int radius,
+            @Param(description = "The world to pregen", contextual = true)
+            World world,
+            @Param(aliases = "middle", description = "The center location of the pregen. Use \"me\" for your current location", defaultValue = "0,0")
+            Vector center
+    ) {
+        try {
+            var engine = Optional.ofNullable(IrisToolbelt.access(world))
+                    .map(PlatformChunkGenerator::getEngine)
+                    .orElse(null);
+
+            if (engine == null) {
+                sender().sendMessage(C.RED + "The engine access for this world is null!");
+                sender().sendMessage(C.RED + "Please make sure the world is loaded & the engine is initialized. Generate a new chunk, for example.");
+            }
+            radius = Math.max(radius, 1024);
+            IrisToolbelt.pregenerate(PregenTask
+                    .builder()
+                    .center(new Position2(center.getBlockX(), center.getBlockZ()))
+                    .gui(true)
+                    .radiusX(radius)
+                    .radiusZ(radius)
+                    .build(), new HeadlessPregenMethod(engine), engine);
+            String msg = C.GREEN + "Headless Pregen started in " + C.GOLD + world.getName() + C.GREEN + " of " + C.GOLD + (radius * 2) + C.GREEN + " by " + C.GOLD + (radius * 2) + C.GREEN + " blocks from " + C.GOLD + center.getX() + "," + center.getZ();
+            sender().sendMessage(msg);
+            Iris.info(msg);
+        } catch (Throwable e) {
+            sender().sendMessage(C.RED + "Epic fail. See console.");
+            Iris.reportError(e);
+            e.printStackTrace();
+        }
+    }
+
     @Decree(description = "Test", aliases = {"ip"})
     public void network() {
         try {

core/src/main/java/com/volmit/iris/core/commands/CommandObject.java

@@ -28,6 +28,8 @@ import com.volmit.iris.core.tools.IrisConverter;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.object.*;
 import com.volmit.iris.util.data.Cuboid;
+import com.volmit.iris.util.data.IrisCustomData;
+import com.volmit.iris.util.data.registry.Materials;
 import com.volmit.iris.util.decree.DecreeExecutor;
 import com.volmit.iris.util.decree.DecreeOrigin;
 import com.volmit.iris.util.decree.annotations.Decree;
@@ -36,12 +38,9 @@ import com.volmit.iris.util.decree.specialhandlers.ObjectHandler;
 import com.volmit.iris.util.format.C;
 import com.volmit.iris.util.math.Direction;
 import com.volmit.iris.util.math.RNG;
-import com.volmit.iris.util.misc.E;
 import com.volmit.iris.util.scheduling.Queue;
 import org.bukkit.*;
 import org.bukkit.block.Block;
-import org.bukkit.block.BlockState;
-import org.bukkit.block.TileState;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.util.Vector;
@@ -54,7 +53,7 @@ import java.util.*;
 @Decree(name = "object", aliases = "o", origin = DecreeOrigin.PLAYER, studio = true, description = "Iris object manipulation")
 public class CommandObject implements DecreeExecutor {
 
-    private static final Set<Material> skipBlocks = Set.of(E.getOrDefault(Material.class, "GRASS", "SHORT_GRASS"), Material.SNOW, Material.VINE, Material.TORCH, Material.DEAD_BUSH,
+    private static final Set<Material> skipBlocks = Set.of(Materials.GRASS, Material.SNOW, Material.VINE, Material.TORCH, Material.DEAD_BUSH,
             Material.POPPY, Material.DANDELION);
 
     public static IObjectPlacer createPlacer(World world, Map<Block, BlockData> futureBlockChanges) {
@@ -79,7 +78,10 @@ public class CommandObject implements DecreeExecutor {
 
                 futureBlockChanges.put(block, block.getBlockData());
 
-                block.setBlockData(d);
+                if (d instanceof IrisCustomData data) {
+                    block.setBlockData(data.getBase());
+                    Iris.warn("Tried to place custom block at " + x + ", " + y + ", " + z + " which is not supported!");
+                } else block.setBlockData(d);
             }
 
             @Override

core/src/main/java/com/volmit/iris/core/commands/CommandPregen.java

@@ -19,9 +19,7 @@
 package com.volmit.iris.core.commands;
 
 import com.volmit.iris.Iris;
-import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.core.gui.PregeneratorJob;
-import com.volmit.iris.core.pregenerator.LazyPregenerator;
 import com.volmit.iris.core.pregenerator.PregenTask;
 import com.volmit.iris.core.tools.IrisToolbelt;
 import com.volmit.iris.util.decree.DecreeExecutor;
@@ -29,12 +27,9 @@ import com.volmit.iris.util.decree.annotations.Decree;
 import com.volmit.iris.util.decree.annotations.Param;
 import com.volmit.iris.util.format.C;
 import com.volmit.iris.util.math.Position2;
-import org.bukkit.Bukkit;
 import org.bukkit.World;
 import org.bukkit.util.Vector;
 
-import java.io.File;
-
 @Decree(name = "pregen", aliases = "pregenerate", description = "Pregenerate your Iris worlds!")
 public class CommandPregen implements DecreeExecutor {
     @Decree(description = "Pregenerate a world")
@@ -52,13 +47,12 @@ public class CommandPregen implements DecreeExecutor {
                 sender().sendMessage(C.RED + "Please make sure the world is loaded & the engine is initialized. Generate a new chunk, for example.");
             }
             radius = Math.max(radius, 1024);
-            int w = (radius >> 9 + 1) * 2;
             IrisToolbelt.pregenerate(PregenTask
                     .builder()
-                    .center(new Position2(center.getBlockX() >> 9, center.getBlockZ() >> 9))
+                    .center(new Position2(center.getBlockX(), center.getBlockZ()))
                     .gui(true)
-                    .width(w)
-                    .height(w)
+                    .radiusX(radius)
+                    .radiusZ(radius)
                     .build(), world);
             String msg = C.GREEN + "Pregen started in " + C.GOLD + world.getName() + C.GREEN + " of " + C.GOLD + (radius * 2) + C.GREEN + " by " + C.GOLD + (radius * 2) + C.GREEN + " blocks from " + C.GOLD + center.getX() + "," + center.getZ();
             sender().sendMessage(msg);

core/src/main/java/com/volmit/iris/core/gui/PregeneratorJob.java

@@ -24,7 +24,6 @@ import com.volmit.iris.core.pregenerator.IrisPregenerator;
 import com.volmit.iris.core.pregenerator.PregenListener;
 import com.volmit.iris.core.pregenerator.PregenTask;
 import com.volmit.iris.core.pregenerator.PregeneratorMethod;
-import com.volmit.iris.core.tools.IrisPackBenchmarking;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.format.Form;
@@ -45,8 +44,6 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.Consumer;
 
-import static com.volmit.iris.core.tools.IrisPackBenchmarking.benchmarkInProgress;
-
 public class PregeneratorJob implements PregenListener {
     private static final Color COLOR_EXISTS = parseColor("#4d7d5b");
     private static final Color COLOR_BLACK = parseColor("#4d7d5b");
@@ -81,12 +78,12 @@ public class PregeneratorJob implements PregenListener {
         this.task = task;
         this.pregenerator = new IrisPregenerator(task, method, this);
         max = new Position2(0, 0);
-        min = new Position2(0, 0);
-        task.iterateRegions((xx, zz) -> {
-            min.setX(Math.min(xx << 5, min.getX()));
-            min.setZ(Math.min(zz << 5, min.getZ()));
-            max.setX(Math.max((xx << 5) + 31, max.getX()));
-            max.setZ(Math.max((zz << 5) + 31, max.getZ()));
+        min = new Position2(Integer.MAX_VALUE, Integer.MAX_VALUE);
+        task.iterateAllChunks((xx, zz) -> {
+            min.setX(Math.min(xx, min.getX()));
+            min.setZ(Math.min(zz, min.getZ()));
+            max.setX(Math.max(xx, max.getX()));
+            max.setZ(Math.max(zz, max.getZ()));
         });
 
         if (IrisSettings.get().getGui().isUseServerLaunchedGuis() && task.isGui()) {
@@ -162,7 +159,7 @@ public class PregeneratorJob implements PregenListener {
     }
 
     public void drawRegion(int x, int z, Color color) {
-        J.a(() -> PregenTask.iterateRegion(x, z, (xx, zz) -> {
+        J.a(() -> task.iterateChunks(x, z, (xx, zz) -> {
             draw(xx, zz, color);
             J.sleep(3);
         }));

core/src/main/java/com/volmit/iris/core/gui/VisionGUI.java

@@ -30,6 +30,7 @@ import com.volmit.iris.engine.object.IrisWorld;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.collection.KSet;
+import com.volmit.iris.util.data.registry.Attributes;
 import com.volmit.iris.util.format.Form;
 import com.volmit.iris.util.math.BlockPosition;
 import com.volmit.iris.util.math.M;
@@ -56,6 +57,8 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.function.BiFunction;
 
+import static com.volmit.iris.util.data.registry.Attributes.MAX_HEALTH;
+
 public class VisionGUI extends JPanel implements MouseWheelListener, KeyListener, MouseMotionListener, MouseInputListener {
     private static final long serialVersionUID = 2094606939770332040L;
     private final KList<LivingEntity> lastEntities = new KList<>();
@@ -636,7 +639,7 @@ public class VisionGUI extends JPanel implements MouseWheelListener, KeyListener
 
                 k.add("Pos: " + h.getLocation().getBlockX() + ", " + h.getLocation().getBlockY() + ", " + h.getLocation().getBlockZ());
                 k.add("UUID: " + h.getUniqueId());
-                k.add("HP: " + h.getHealth() + " / " + h.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue());
+                k.add("HP: " + h.getHealth() + " / " + h.getAttribute(MAX_HEALTH).getValue());
 
                 drawCardTR(g, k);
             }

core/src/main/java/com/volmit/iris/core/gui/components/IrisRenderer.java

@@ -55,10 +55,10 @@ public class IrisRenderer {
                 IrisBiome b = renderer.getBiome((int) Math.round(x), renderer.getMaxHeight() - 1, (int) Math.round(z));
                 IrisBiomeGeneratorLink g = b.getGenerators().get(0);
                 Color c;
-                if (g.getMax(renderer) <= 0) {
+                if (g.getMax() <= 0) {
                     // Max is below water level, so it is most likely an ocean biome
                     c = Color.BLUE;
-                } else if (g.getMin(renderer) < 0) {
+                } else if (g.getMin() < 0) {
                     // Min is below water level, but max is not, so it is most likely a shore biome
                     c = Color.YELLOW;
                 } else {

core/src/main/java/com/volmit/iris/core/link/ExternalDataProvider.java

@@ -2,7 +2,7 @@ package com.volmit.iris.core.link;
 
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.util.collection.KMap;
-import com.volmit.iris.util.data.IrisBlockData;
+import com.volmit.iris.util.data.IrisCustomData;
 import lombok.Getter;
 import lombok.NonNull;
 import lombok.RequiredArgsConstructor;
@@ -49,7 +49,7 @@ public abstract class ExternalDataProvider {
      * @param blockId The id of the block to get
      * @param state The state of the block to get
      * @return Corresponding {@link BlockData} to the blockId
-     *         may return {@link IrisBlockData} for blocks that need a world for placement
+     *         may return {@link IrisCustomData} for blocks that need a world for placement
      * @throws MissingResourceException when the blockId is invalid
      */
     @NotNull
@@ -77,7 +77,7 @@ public abstract class ExternalDataProvider {
 
     /**
      * This method is used for placing blocks that need to use the plugins api
-     * it will only be called when the {@link ExternalDataProvider#getBlockData(Identifier, KMap)} returned a {@link IrisBlockData}
+     * it will only be called when the {@link ExternalDataProvider#getBlockData(Identifier, KMap)} returned a {@link IrisCustomData}
      *
      * @param engine The engine of the world the block is being placed in
      * @param block The block where the block should be placed

core/src/main/java/com/volmit/iris/core/link/HMCLeavesDataProvider.java

@@ -6,7 +6,7 @@ import com.volmit.iris.core.service.ExternalDataSVC;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
-import com.volmit.iris.util.data.IrisBlockData;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.reflect.WrappedField;
 import com.volmit.iris.util.reflect.WrappedReturningMethod;
 import org.bukkit.Bukkit;
@@ -64,7 +64,7 @@ public class HMCLeavesDataProvider extends ExternalDataProvider {
 		BlockData blockData = Bukkit.createBlockData(material);
 		if (IrisSettings.get().getGenerator().preventLeafDecay && blockData instanceof Leaves leaves)
 			leaves.setPersistent(true);
-		return new IrisBlockData(blockData, ExternalDataSVC.buildState(blockId, state));
+		return new IrisCustomData(blockData, ExternalDataSVC.buildState(blockId, state));
 	}
 
 	@NotNull

core/src/main/java/com/volmit/iris/core/link/MythicCrucibleDataProvider.java

@@ -27,7 +27,7 @@ import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.data.B;
-import com.volmit.iris.util.data.IrisBlockData;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.math.RNG;
 import io.lumine.mythic.bukkit.BukkitAdapter;
 import io.lumine.mythic.bukkit.utils.serialize.Chroma;
@@ -71,7 +71,7 @@ public class MythicCrucibleDataProvider extends ExternalDataProvider {
         CustomBlockItemContext blockItemContext = crucibleItem.getBlockData();
         FurnitureItemContext furnitureItemContext = crucibleItem.getFurnitureData();
         if (furnitureItemContext != null) {
-            return new IrisBlockData(B.getAir(), ExternalDataSVC.buildState(blockId, state));
+            return new IrisCustomData(B.getAir(), ExternalDataSVC.buildState(blockId, state));
         } else if (blockItemContext != null) {
             return blockItemContext.getBlockData();
         }

core/src/main/java/com/volmit/iris/core/link/MythicMobsLink.java

@@ -26,6 +26,7 @@ import org.bukkit.plugin.Plugin;
 
 import javax.annotation.Nullable;
 import java.util.Collection;
+import java.util.List;
 
 public class MythicMobsLink {
 
@@ -54,6 +55,6 @@ public class MythicMobsLink {
     }
 
     public Collection<String> getMythicMobTypes() {
-        return isEnabled() ? MythicBukkit.inst().getMobManager().getMobNames() : null;
+        return isEnabled() ? MythicBukkit.inst().getMobManager().getMobNames() : List.of();
     }
 }

core/src/main/java/com/volmit/iris/core/link/NexoDataProvider.java

@@ -11,7 +11,7 @@ import com.volmit.iris.engine.data.cache.Cache;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.data.B;
-import com.volmit.iris.util.data.IrisBlockData;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.math.RNG;
 import org.bukkit.Color;
 import org.bukkit.block.Block;
@@ -49,9 +49,9 @@ public class NexoDataProvider extends ExternalDataProvider {
             BlockData data = NexoBlocks.blockData(blockId.key());
             if (data == null)
                 throw new MissingResourceException("Failed to find BlockData!", blockId.namespace(), blockId.key());
-            return new IrisBlockData(data, blockState);
+            return new IrisCustomData(data, blockState);
         } else if (NexoFurniture.isFurniture(blockId.key())) {
-            return new IrisBlockData(B.getAir(), blockState);
+            return new IrisCustomData(B.getAir(), blockState);
         }
 
         throw new MissingResourceException("Failed to find BlockData!", blockId.namespace(), blockId.key());
@@ -125,7 +125,7 @@ public class NexoDataProvider extends ExternalDataProvider {
     @NotNull
     @Override
     public Identifier[] getBlockTypes() {
-        return Arrays.stream(NexoItems.itemNames())
+        return NexoItems.itemNames().stream()
                 .map(i -> new Identifier("nexo", i))
                 .filter(i -> {
                     try {
@@ -140,7 +140,7 @@ public class NexoDataProvider extends ExternalDataProvider {
     @NotNull
     @Override
     public Identifier[] getItemTypes() {
-        return Arrays.stream(NexoItems.itemNames())
+        return NexoItems.itemNames().stream()
                 .map(i -> new Identifier("nexo", i))
                 .filter(i -> {
                     try {

core/src/main/java/com/volmit/iris/core/nms/INMS.java

@@ -23,19 +23,28 @@ import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.core.nms.v1X.NMSBinding1X;
 import org.bukkit.Bukkit;
 
+import java.util.List;
 import java.util.Map;
 
 public class INMS {
     private static final Map<String, String> REVISION = Map.of(
-        "1.20.5", "v1_20_R4",
-        "1.20.6", "v1_20_R4",
-        "1.21", "v1_21_R1",
-        "1.21.1", "v1_21_R1",
-        "1.21.2", "v1_21_R2",
-        "1.21.3", "v1_21_R2"
+            "1.20.5", "v1_20_R4",
+            "1.20.6", "v1_20_R4",
+            "1.21", "v1_21_R1",
+            "1.21.1", "v1_21_R1",
+            "1.21.2", "v1_21_R2",
+            "1.21.3", "v1_21_R2",
+            "1.21.4", "v1_21_R3"
     );
+    private static final List<Version> PACKS = List.of(
+            new Version(21, 4, "31020"),
+            new Version(21, 2, "31000"),
+            new Version(20, 1, "3910")
+    );
+
     //@done
     private static final INMSBinding binding = bind();
+    public static final String OVERWORLD_TAG = getOverworldTag();
 
     public static INMSBinding get() {
         return binding;
@@ -86,4 +95,26 @@ public class INMS {
 
         return new NMSBinding1X();
     }
+
+    private static String getOverworldTag() {
+        var version = Bukkit.getServer().getBukkitVersion().split("-")[0].split("\\.", 3);
+        int major = 0;
+        int minor = 0;
+
+        if (version.length > 2) {
+            major = Integer.parseInt(version[1]);
+            minor = Integer.parseInt(version[2]);
+        } else if (version.length == 2) {
+            major = Integer.parseInt(version[1]);
+        }
+
+        for (var p : PACKS) {
+            if (p.major > major || p.minor > minor)
+                continue;
+            return p.tag;
+        }
+        return "3910";
+    }
+
+    private record Version(int major, int minor, String tag) {}
 }

core/src/main/java/com/volmit/iris/core/nms/INMSBinding.java

@@ -18,8 +18,11 @@
 
 package com.volmit.iris.core.nms;
 
+import com.volmit.iris.core.nms.container.AutoClosing;
 import com.volmit.iris.core.nms.container.BiomeColor;
+import com.volmit.iris.core.nms.container.Pair;
 import com.volmit.iris.core.nms.datapack.DataVersion;
+import com.volmit.iris.core.nms.headless.IRegionStorage;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
@@ -30,15 +33,12 @@ import com.volmit.iris.util.nbt.mca.palette.MCAPaletteAccess;
 import com.volmit.iris.util.nbt.tag.CompoundTag;
 import org.bukkit.*;
 import org.bukkit.block.Biome;
-import org.bukkit.entity.Dolphin;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.EntityType;
 import org.bukkit.event.entity.CreatureSpawnEvent;
 import org.bukkit.generator.ChunkGenerator;
-import org.bukkit.generator.structure.Structure;
 import org.bukkit.inventory.ItemStack;
 
-import java.awt.*;
 import java.awt.Color;
 
 public interface INMSBinding {
@@ -91,7 +91,12 @@ public interface INMSBinding {
     MCABiomeContainer newBiomeContainer(int min, int max);
 
     default World createWorld(WorldCreator c) {
-        return c.createWorld();
+        if (missingDimensionTypes(true, true, true))
+            throw new IllegalStateException("Missing dimenstion types to create world");
+
+        try (var ignored = injectLevelStems()) {
+            return c.createWorld();
+        }
     }
 
     int countCustomBiomes();
@@ -124,5 +129,13 @@ public interface INMSBinding {
         return 441;
     }
 
+    IRegionStorage createRegionStorage(Engine engine);
+
     KList<String> getStructureKeys();
+
+    AutoClosing injectLevelStems();
+
+    Pair<Integer, AutoClosing> injectUncached(boolean overworld, boolean nether, boolean end);
+
+    boolean missingDimensionTypes(boolean overworld, boolean nether, boolean end);
 }

core/src/main/java/com/volmit/iris/core/nms/container/AutoClosing.java

@@ -0,0 +1,22 @@
+package com.volmit.iris.core.nms.container;
+
+import com.volmit.iris.util.function.NastyRunnable;
+import lombok.AllArgsConstructor;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+@AllArgsConstructor
+public class AutoClosing implements AutoCloseable {
+    private final AtomicBoolean closed = new AtomicBoolean();
+    private final NastyRunnable action;
+
+    @Override
+    public void close() {
+        if (closed.getAndSet(true)) return;
+        try {
+            action.run();
+        } catch (Throwable e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

core/src/main/java/com/volmit/iris/core/nms/datapack/IDataFixer.java

@@ -1,11 +1,28 @@
 package com.volmit.iris.core.nms.datapack;
 
 import com.volmit.iris.engine.object.IrisBiomeCustom;
+import com.volmit.iris.engine.object.IrisRange;
 import com.volmit.iris.util.json.JSONObject;
 
 public interface IDataFixer {
 
-    JSONObject fixCustomBiome(IrisBiomeCustom biome, JSONObject json);
+    default JSONObject fixCustomBiome(IrisBiomeCustom biome, JSONObject json) {
+        return json;
+    }
 
-    JSONObject fixDimension(JSONObject json);
+    JSONObject rawDimension(Dimension dimension);
+
+    default JSONObject createDimension(Dimension dimension, IrisRange height, int logicalHeight) {
+        JSONObject obj = rawDimension(dimension);
+        obj.put("min_y", height.getMin());
+        obj.put("height", height.getMax() - height.getMin());
+        obj.put("logical_height", logicalHeight);
+        return obj;
+    }
+
+    enum Dimension {
+        OVERRWORLD,
+        NETHER,
+        THE_END
+    }
 }

core/src/main/java/com/volmit/iris/core/nms/datapack/v1192/DataFixerV1192.java

@@ -1,18 +1,81 @@
 package com.volmit.iris.core.nms.datapack.v1192;
 
 import com.volmit.iris.core.nms.datapack.IDataFixer;
-import com.volmit.iris.engine.object.IrisBiomeCustom;
 import com.volmit.iris.util.json.JSONObject;
+import java.util.Map;
 
 public class DataFixerV1192 implements IDataFixer {
 
-    @Override
-    public JSONObject fixCustomBiome(IrisBiomeCustom biome, JSONObject json) {
-        return json;
-    }
+    private static final Map<Dimension, String> DIMENSIONS = Map.of(
+            Dimension.OVERRWORLD, """
+            {
+              "ambient_light": 0.0,
+              "bed_works": true,
+              "coordinate_scale": 1.0,
+              "effects": "minecraft:overworld",
+              "has_ceiling": false,
+              "has_raids": true,
+              "has_skylight": true,
+              "infiniburn": "#minecraft:infiniburn_overworld",
+              "monster_spawn_block_light_limit": 0,
+              "monster_spawn_light_level": {
+                "type": "minecraft:uniform",
+                "value": {
+                  "max_inclusive": 7,
+                  "min_inclusive": 0
+                }
+              },
+              "natural": true,
+              "piglin_safe": false,
+              "respawn_anchor_works": false,
+              "ultrawarm": false
+            }""",
+            Dimension.NETHER, """
+            {
+              "ambient_light": 0.1,
+              "bed_works": false,
+              "coordinate_scale": 8.0,
+              "effects": "minecraft:the_nether",
+              "fixed_time": 18000,
+              "has_ceiling": true,
+              "has_raids": false,
+              "has_skylight": false,
+              "infiniburn": "#minecraft:infiniburn_nether",
+              "monster_spawn_block_light_limit": 15,
+              "monster_spawn_light_level": 7,
+              "natural": false,
+              "piglin_safe": true,
+              "respawn_anchor_works": true,
+              "ultrawarm": true
+            }""",
+            Dimension.THE_END, """
+            {
+              "ambient_light": 0.0,
+              "bed_works": false,
+              "coordinate_scale": 1.0,
+              "effects": "minecraft:the_end",
+              "fixed_time": 6000,
+              "has_ceiling": false,
+              "has_raids": true,
+              "has_skylight": false,
+              "infiniburn": "#minecraft:infiniburn_end",
+              "monster_spawn_block_light_limit": 0,
+              "monster_spawn_light_level": {
+                "type": "minecraft:uniform",
+                "value": {
+                  "max_inclusive": 7,
+                  "min_inclusive": 0
+                }
+              },
+              "natural": false,
+              "piglin_safe": false,
+              "respawn_anchor_works": false,
+              "ultrawarm": false
+            }"""
+    );
 
     @Override
-    public JSONObject fixDimension(JSONObject json) {
-        return json;
+    public JSONObject rawDimension(Dimension dimension) {
+        return new JSONObject(DIMENSIONS.get(dimension));
     }
 }

core/src/main/java/com/volmit/iris/core/nms/datapack/v1206/DataFixerV1206.java

@@ -1,6 +1,6 @@
 package com.volmit.iris.core.nms.datapack.v1206;
 
-import com.volmit.iris.core.nms.datapack.IDataFixer;
+import com.volmit.iris.core.nms.datapack.v1192.DataFixerV1192;
 import com.volmit.iris.engine.object.IrisBiomeCustom;
 import com.volmit.iris.engine.object.IrisBiomeCustomSpawn;
 import com.volmit.iris.engine.object.IrisBiomeCustomSpawnType;
@@ -10,7 +10,7 @@ import com.volmit.iris.util.json.JSONObject;
 
 import java.util.Locale;
 
-public class DataFixerV1206 implements IDataFixer {
+public class DataFixerV1206 extends DataFixerV1192 {
     @Override
     public JSONObject fixCustomBiome(IrisBiomeCustom biome, JSONObject json) {
         int spawnRarity = biome.getSpawnRarity();
@@ -45,7 +45,8 @@ public class DataFixerV1206 implements IDataFixer {
     }
 
     @Override
-    public JSONObject fixDimension(JSONObject json) {
+    public JSONObject rawDimension(Dimension dimension) {
+        JSONObject json = super.rawDimension(dimension);
         if (!(json.get("monster_spawn_light_level") instanceof JSONObject lightLevel))
             return json;
         var value = (JSONObject) lightLevel.remove("value");

core/src/main/java/com/volmit/iris/core/nms/headless/IRegion.java

@@ -0,0 +1,17 @@
+package com.volmit.iris.core.nms.headless;
+
+import com.volmit.iris.util.documentation.ChunkCoordinates;
+import lombok.NonNull;
+
+import java.io.IOException;
+
+public interface IRegion extends AutoCloseable {
+
+    @ChunkCoordinates
+    boolean exists(int x, int z);
+
+    void write(@NonNull SerializableChunk chunk) throws IOException;
+
+    @Override
+    void close();
+}

core/src/main/java/com/volmit/iris/core/nms/headless/IRegionStorage.java

@@ -0,0 +1,27 @@
+package com.volmit.iris.core.nms.headless;
+
+import com.volmit.iris.util.context.ChunkContext;
+import com.volmit.iris.util.documentation.ChunkCoordinates;
+import com.volmit.iris.util.documentation.RegionCoordinates;
+import lombok.NonNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.io.IOException;
+
+public interface IRegionStorage {
+
+    @ChunkCoordinates
+    boolean exists(int x, int z);
+
+    @Nullable
+    @RegionCoordinates
+    IRegion getRegion(int x, int z, boolean existingOnly) throws IOException;
+
+    @NonNull
+    @ChunkCoordinates
+    SerializableChunk createChunk(int x, int z);
+
+    void fillBiomes(@NonNull SerializableChunk chunk, @Nullable ChunkContext ctx);
+
+    void close();
+}

core/src/main/java/com/volmit/iris/core/nms/headless/SerializableChunk.java

@@ -0,0 +1,12 @@
+package com.volmit.iris.core.nms.headless;
+
+import com.volmit.iris.engine.data.chunk.TerrainChunk;
+import com.volmit.iris.util.math.Position2;
+
+public interface SerializableChunk extends TerrainChunk {
+    Position2 getPos();
+
+    Object serialize();
+
+    void mark();
+}

core/src/main/java/com/volmit/iris/core/nms/v1X/NMSBinding1X.java

@@ -20,7 +20,10 @@ package com.volmit.iris.core.nms.v1X;
 
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.nms.INMSBinding;
+import com.volmit.iris.core.nms.container.AutoClosing;
 import com.volmit.iris.core.nms.container.BiomeColor;
+import com.volmit.iris.core.nms.headless.IRegionStorage;
+import com.volmit.iris.core.nms.container.Pair;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
@@ -109,6 +112,11 @@ public class NMSBinding1X implements INMSBinding {
         return Color.GREEN;
     }
 
+    @Override
+    public IRegionStorage createRegionStorage(Engine engine) {
+        return null;
+    }
+
     @Override
     public KList<String> getStructureKeys() {
         var list = StreamSupport.stream(Registry.STRUCTURE.spliterator(), false)
@@ -118,6 +126,21 @@ public class NMSBinding1X implements INMSBinding {
         return new KList<>(list);
     }
 
+    @Override
+    public AutoClosing injectLevelStems() {
+        return new AutoClosing(() -> {});
+    }
+
+    @Override
+    public Pair<Integer, AutoClosing> injectUncached(boolean overworld, boolean nether, boolean end) {
+        return new Pair<>(0, new AutoClosing(() -> {}));
+    }
+
+    @Override
+    public boolean missingDimensionTypes(boolean overworld, boolean nether, boolean end) {
+        return false;
+    }
+
     @Override
     public CompoundTag serializeEntity(Entity location) {
         return null;

core/src/main/java/com/volmit/iris/core/pregenerator/ChunkUpdater.java

@@ -165,8 +165,11 @@ public class ChunkUpdater {
             if (rX < dimensions.min.getX() || rX > dimensions.max.getX() || rZ < dimensions.min.getZ() || rZ > dimensions.max.getZ()) {
                 return;
             }
+            if (!new File(world.getWorldFolder(), "region" + File.separator + rX + "." + rZ + ".mca").exists()) {
+                return;
+            }
 
-            PregenTask.iterateRegion(rX, rZ, (x, z) -> {
+            task.iterateChunks(rX, rZ, (x, z) -> {
                 while (paused.get() && !cancelled.get()) {
                     J.sleep(50);
                 }
@@ -348,8 +351,8 @@ public class ChunkUpdater {
         int width = maxZ - minZ + 1;
 
         return new Dimensions(new Position2(minX, minZ), new Position2(maxX, maxZ), height * width, PregenTask.builder()
-                .width((int) Math.ceil(width / 2d))
-                .height((int) Math.ceil(height / 2d))
+                .radiusZ((int) Math.ceil(width / 2d * 512))
+                .radiusX((int) Math.ceil(height / 2d * 512))
                 .center(new Position2(oX, oZ))
                 .build());
     }

core/src/main/java/com/volmit/iris/core/pregenerator/EmptyListener.java

@@ -0,0 +1,80 @@
+package com.volmit.iris.core.pregenerator;
+
+public class EmptyListener implements PregenListener {
+    public static PregenListener INSTANCE = new EmptyListener();
+
+    @Override
+    public void onTick(double chunksPerSecond, double chunksPerMinute, double regionsPerMinute, double percent, int generated, int totalChunks, int chunksRemaining, long eta, long elapsed, String method) {
+
+    }
+
+    @Override
+    public void onChunkGenerating(int x, int z) {
+
+    }
+
+    @Override
+    public void onChunkGenerated(int x, int z) {
+
+    }
+
+    @Override
+    public void onRegionGenerated(int x, int z) {
+
+    }
+
+    @Override
+    public void onRegionGenerating(int x, int z) {
+
+    }
+
+    @Override
+    public void onChunkCleaned(int x, int z) {
+
+    }
+
+    @Override
+    public void onRegionSkipped(int x, int z) {
+
+    }
+
+    @Override
+    public void onNetworkStarted(int x, int z) {
+
+    }
+
+    @Override
+    public void onNetworkFailed(int x, int z) {
+
+    }
+
+    @Override
+    public void onNetworkReclaim(int revert) {
+
+    }
+
+    @Override
+    public void onNetworkGeneratedChunk(int x, int z) {
+
+    }
+
+    @Override
+    public void onNetworkDownloaded(int x, int z) {
+
+    }
+
+    @Override
+    public void onClose() {
+
+    }
+
+    @Override
+    public void onSaving() {
+
+    }
+
+    @Override
+    public void onChunkExistsInRegionGen(int x, int z) {
+
+    }
+}

core/src/main/java/com/volmit/iris/core/pregenerator/IrisPregenerator.java

@@ -19,7 +19,6 @@
 package com.volmit.iris.core.pregenerator;
 
 import com.volmit.iris.Iris;
-import com.volmit.iris.core.pack.IrisPack;
 import com.volmit.iris.core.tools.IrisPackBenchmarking;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KSet;
@@ -83,7 +82,7 @@ public class IrisPregenerator {
         generatedLast = new AtomicInteger(0);
         generatedLastMinute = new AtomicInteger(0);
         totalChunks = new AtomicInteger(0);
-        task.iterateRegions((_a, _b) -> totalChunks.addAndGet(1024));
+        task.iterateAllChunks((_a, _b) -> totalChunks.incrementAndGet());
         startTime = new AtomicLong(M.ms());
         ticker = new Looper() {
             @Override
@@ -194,7 +193,7 @@ public class IrisPregenerator {
         } else if (!regions) {
             hit = true;
             listener.onRegionGenerating(x, z);
-            PregenTask.iterateRegion(x, z, (xx, zz) -> {
+            task.iterateChunks(x, z, (xx, zz) -> {
                 while (paused.get() && !shutdown.get()) {
                     J.sleep(50);
                 }

core/src/main/java/com/volmit/iris/core/pregenerator/PregenTask.java

@@ -32,17 +32,26 @@ import java.util.Comparator;
 @Data
 public class PregenTask {
     private static final Position2 ZERO = new Position2(0, 0);
-    private static final KList<Position2> ORDER_CENTER = computeChunkOrder();
     private static final KMap<Position2, KList<Position2>> ORDERS = new KMap<>();
 
     @Builder.Default
-    private boolean gui = false;
+    private final boolean gui = false;
     @Builder.Default
-    private Position2 center = new Position2(0, 0);
+    private final Position2 center = new Position2(0, 0);
     @Builder.Default
-    private int width = 1;
+    private final int radiusX = 1;
     @Builder.Default
-    private int height = 1;
+    private final int radiusZ = 1;
+
+    private final Bounds bounds = new Bounds();
+
+    protected PregenTask(boolean gui, Position2 center, int radiusX, int radiusZ) {
+        this.gui = gui;
+        this.center = new ProxiedPos(center);
+        this.radiusX = radiusX;
+        this.radiusZ = radiusZ;
+        bounds.update();
+    }
 
     public static void iterateRegion(int xr, int zr, Spiraled s, Position2 pull) {
         for (Position2 i : ORDERS.computeIfAbsent(pull, PregenTask::computeOrder)) {
@@ -70,29 +79,72 @@ public class PregenTask {
         return p;
     }
 
-    private static KList<Position2> computeChunkOrder() {
-        Position2 center = new Position2(15, 15);
-        KList<Position2> p = new KList<>();
-        new Spiraler(33, 33, (x, z) -> {
-            int xx = x + 15;
-            int zz = z + 15;
-            if (xx < 0 || xx > 31 || zz < 0 || zz > 31) {
-                return;
-            }
-
-            p.add(new Position2(xx, zz));
-        }).drain();
-        p.sort(Comparator.comparing((i) -> i.distance(center)));
-        return p;
+    public void iterateRegions(Spiraled s) {
+        var bound = bounds.region();
+        new Spiraler(bound.sizeX, bound.sizeZ, ((x, z) -> {
+            if (bound.check(x, z)) s.on(x, z);
+        })).setOffset(center.getX() >> 9, center.getZ() >> 9).drain();
     }
 
-    public void iterateRegions(Spiraled s) {
-        new Spiraler(getWidth() * 2, getHeight() * 2, s)
-                .setOffset(center.getX(), center.getZ()).drain();
+    public void iterateChunks(int rX, int rZ, Spiraled s) {
+        var bound = bounds.chunk();
+        iterateRegion(rX, rZ, ((x, z) -> {
+            if (bound.check(x, z)) s.on(x, z);
+        }));
     }
 
     public void iterateAllChunks(Spiraled s) {
-        new Spiraler(getWidth() * 2, getHeight() * 2, (x, z) -> iterateRegion(x, z, s))
-                .setOffset(center.getX(), center.getZ()).drain();
+        iterateRegions(((rX, rZ) -> iterateChunks(rX, rZ, s)));
+    }
+
+    private class Bounds {
+        private Bound chunk = null;
+        private Bound region = null;
+
+        public void update() {
+            int maxX = center.getX() + radiusX;
+            int maxZ = center.getZ() + radiusZ;
+            int minX = center.getX() - radiusX;
+            int minZ = center.getZ() - radiusZ;
+
+            chunk = new Bound(minX >> 4, minZ >> 4, Math.ceilDiv(maxX, 16), Math.ceilDiv(maxZ, 16));
+            region = new Bound(minX >> 9, minZ >> 9, Math.ceilDiv(maxX, 512), Math.ceilDiv(maxZ, 512));
+        }
+
+        public Bound chunk() {
+            if (chunk == null) update();
+            return chunk;
+        }
+
+        public Bound region() {
+            if (region == null) update();
+            return region;
+        }
+    }
+
+    private record Bound(int minX, int maxX, int minZ, int maxZ, int sizeX, int sizeZ) {
+        private Bound(int minX, int minZ, int maxX, int maxZ) {
+            this(minX, maxX, minZ, maxZ, maxZ - minZ + 1, maxZ - minZ + 1);
+        }
+
+        boolean check(int x, int z) {
+            return x >= minX && x <= maxX && z >= minZ && z <= maxZ;
+        }
+    }
+
+    private static class ProxiedPos extends Position2 {
+        public ProxiedPos(Position2 p) {
+            super(p.getX(), p.getZ());
+        }
+
+        @Override
+        public void setX(int x) {
+            throw new IllegalStateException("This Position2 may not be modified");
+        }
+
+        @Override
+        public void setZ(int z) {
+            throw new IllegalStateException("This Position2 may not be modified");
+        }
     }
 }

core/src/main/java/com/volmit/iris/core/pregenerator/methods/HeadlessPregenMethod.java

@@ -0,0 +1,112 @@
+/*
+ *  Iris is a World Generator for Minecraft Bukkit Servers
+ *  Copyright (c) 2024 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.volmit.iris.core.pregenerator.methods;
+
+import com.volmit.iris.Iris;
+import com.volmit.iris.core.IrisSettings;
+import com.volmit.iris.core.pregenerator.PregenListener;
+import com.volmit.iris.core.pregenerator.PregeneratorMethod;
+import com.volmit.iris.engine.framework.Engine;
+import com.volmit.iris.engine.object.IrisHeadless;
+import com.volmit.iris.util.mantle.Mantle;
+import com.volmit.iris.util.parallel.MultiBurst;
+
+import java.io.IOException;
+import java.util.concurrent.Semaphore;
+
+public class HeadlessPregenMethod implements PregeneratorMethod {
+    private final Engine engine;
+    private final IrisHeadless headless;
+    private final Semaphore semaphore;
+    private final int max;
+    private final MultiBurst burst;
+
+    public HeadlessPregenMethod(Engine engine) {
+        this(engine, IrisSettings.getThreadCount(IrisSettings.get().getConcurrency().getParallelism()));
+    }
+
+    public HeadlessPregenMethod(Engine engine, int threads) {
+        this.max = Math.max(threads, 4);
+        this.engine = engine;
+        this.headless = new IrisHeadless(engine);
+        burst = new MultiBurst("HeadlessPregen", 8);
+        this.semaphore = new Semaphore(max);
+    }
+
+    @Override
+    public void init() {
+    }
+
+    @Override
+    public void close() {
+        try {
+            semaphore.acquire(max);
+        } catch (InterruptedException ignored) {
+        }
+        try {
+            headless.close();
+        } catch (IOException e) {
+            Iris.error("Failed to close headless");
+            e.printStackTrace();
+        }
+        burst.close();
+    }
+
+    @Override
+    public void save() {
+    }
+
+    @Override
+    public boolean supportsRegions(int x, int z, PregenListener listener) {
+        return false;
+    }
+
+    @Override
+    public String getMethod(int x, int z) {
+        return "Headless";
+    }
+
+    @Override
+    public void generateRegion(int x, int z, PregenListener listener) {
+    }
+
+    @Override
+    public void generateChunk(int x, int z, PregenListener listener) {
+        try {
+            semaphore.acquire();
+        } catch (InterruptedException ignored) {
+            return;
+        }
+
+        burst.complete(() -> {
+            try {
+                listener.onChunkGenerating(x, z);
+                headless.generateChunk(x, z);
+                listener.onChunkGenerated(x, z);
+            } finally {
+                semaphore.release();
+            }
+        });
+    }
+
+    @Override
+    public Mantle getMantle() {
+        return engine.getMantle().getMantle();
+    }
+}

core/src/main/java/com/volmit/iris/core/safeguard/IrisSafeguard.java

@@ -1,6 +1,7 @@
 package com.volmit.iris.core.safeguard;
 
 import com.volmit.iris.Iris;
+import com.volmit.iris.core.IrisSettings;
 
 public class IrisSafeguard {
     public static boolean unstablemode = false;
@@ -11,5 +12,13 @@ public class IrisSafeguard {
         Iris.info("Enabled Iris SafeGuard");
         ServerBootSFG.BootCheck();
     }
+
+    public static void earlySplash() {
+        if (ServerBootSFG.safeguardPassed || IrisSettings.get().getGeneral().DoomsdayAnnihilationSelfDestructMode)
+            return;
+
+        Iris.instance.splash();
+        UtilsSFG.splash();
+    }
 }
 

core/src/main/java/com/volmit/iris/core/safeguard/ServerBootSFG.java

@@ -3,6 +3,7 @@ package com.volmit.iris.core.safeguard;
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.nms.INMS;
 import com.volmit.iris.core.nms.v1X.NMSBinding1X;
+import com.volmit.iris.engine.object.IrisContextInjector;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.PluginManager;
@@ -29,6 +30,7 @@ public class ServerBootSFG {
     public static boolean isJRE = false;
     public static boolean hasPrivileges = true;
     public static boolean unsuportedversion = false;
+    public static boolean missingDimensionTypes = false;
     protected static boolean safeguardPassed;
     public static boolean passedserversoftware = true;
     protected static int count;
@@ -110,6 +112,12 @@ public class ServerBootSFG {
             severityMedium++;
         }
 
+        if (IrisContextInjector.isMissingDimensionTypes()) {
+            missingDimensionTypes = true;
+            joiner.add("Missing Dimension Types");
+            severityHigh++;
+        }
+
         allIncompatibilities = joiner.toString();
 
         safeguardPassed = (severityHigh == 0 && severityMedium == 0 && severityLow == 0);

core/src/main/java/com/volmit/iris/core/safeguard/UtilsSFG.java

@@ -37,7 +37,12 @@ public class UtilsSFG {
             }
             if (ServerBootSFG.unsuportedversion) {
                 Iris.safeguard(C.RED + "Server Version");
-                Iris.safeguard(C.RED + "- Iris only supports 1.19.2 > 1.21.3");
+                Iris.safeguard(C.RED + "- Iris only supports 1.20.1 > 1.21.4");
+            }
+            if (ServerBootSFG.missingDimensionTypes) {
+                Iris.safeguard(C.RED + "Dimension Types");
+                Iris.safeguard(C.RED + "- Required Iris dimension types were not loaded.");
+                Iris.safeguard(C.RED + "- If this still happens after a restart please contact support.");
             }
             if (!ServerBootSFG.passedserversoftware) {
                 Iris.safeguard(C.YELLOW + "Unsupported Server Software");

core/src/main/java/com/volmit/iris/core/service/StudioSVC.java

@@ -24,6 +24,7 @@ import com.volmit.iris.Iris;
 import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.core.ServerConfigurator;
 import com.volmit.iris.core.loader.IrisData;
+import com.volmit.iris.core.nms.INMS;
 import com.volmit.iris.core.pack.IrisPack;
 import com.volmit.iris.core.project.IrisProject;
 import com.volmit.iris.core.tools.IrisToolbelt;
@@ -64,7 +65,7 @@ public class StudioSVC implements IrisService {
             if (!f.exists()) {
                 Iris.info("Downloading Default Pack " + pack);
                 if (pack.equals("overworld")) {
-                    String url = "https://github.com/IrisDimensions/overworld/releases/download/" + Iris.OVERWORLD_TAG + "/overworld.zip";
+                    String url = "https://github.com/IrisDimensions/overworld/releases/download/" + INMS.OVERWORLD_TAG + "/overworld.zip";
                     Iris.service(StudioSVC.class).downloadRelease(Iris.getSender(), url, false, false);
                 } else {
                     downloadSearch(Iris.getSender(), pack, false);

core/src/main/java/com/volmit/iris/core/service/TreeSVC.java

@@ -27,6 +27,7 @@ import com.volmit.iris.engine.platform.PlatformChunkGenerator;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.data.Cuboid;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.math.BlockPosition;
 import com.volmit.iris.util.math.RNG;
 import com.volmit.iris.util.plugin.IrisService;
@@ -34,7 +35,6 @@ import com.volmit.iris.util.scheduling.J;
 import org.bukkit.*;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockState;
-import org.bukkit.block.TileState;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.block.data.type.Sapling;
 import org.bukkit.event.EventHandler;
@@ -142,7 +142,9 @@ public class TreeSVC implements IrisService {
             public void set(int x, int y, int z, BlockData d) {
                 Block b = event.getWorld().getBlockAt(x, y, z);
                 BlockState state = b.getState();
-                state.setBlockData(d);
+                if (d instanceof IrisCustomData data)
+                    state.setBlockData(data.getBase());
+                else state.setBlockData(d);
                 blockStateList.add(b.getState());
                 dataCache.put(new Location(event.getWorld(), x, y, z), d);
             }
@@ -213,12 +215,17 @@ public class TreeSVC implements IrisService {
             block = false;
 
             if (!iGrow.isCancelled()) {
-                for (BlockState block : iGrow.getBlocks()) {
-                    Location l = block.getLocation();
+                for (BlockState state : iGrow.getBlocks()) {
+                    Location l = state.getLocation();
 
-                    if (dataCache.containsKey(l)) {
-                        l.getBlock().setBlockData(dataCache.get(l), false);
-                    }
+                    BlockData d = dataCache.get(l);
+                    if (d == null) continue;
+                    Block block = l.getBlock();
+
+                    if (d instanceof IrisCustomData data) {
+                        block.setBlockData(data.getBase(), false);
+                        Iris.service(ExternalDataSVC.class).processUpdate(engine, block, data.getCustom());
+                    } else block.setBlockData(d);
                 }
             }
         });

core/src/main/java/com/volmit/iris/core/service/WandSVC.java

@@ -30,15 +30,12 @@ import com.volmit.iris.util.format.C;
 import com.volmit.iris.util.math.M;
 import com.volmit.iris.util.matter.Matter;
 import com.volmit.iris.util.matter.WorldMatter;
-import com.volmit.iris.util.misc.E;
 import com.volmit.iris.util.plugin.IrisService;
 import com.volmit.iris.util.plugin.VolmitSender;
 import com.volmit.iris.util.scheduling.J;
-import com.volmit.iris.util.scheduling.S;
 import com.volmit.iris.util.scheduling.SR;
 import com.volmit.iris.util.scheduling.jobs.Job;
 import org.bukkit.*;
-import org.bukkit.block.Block;
 import org.bukkit.enchantments.Enchantment;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
@@ -56,11 +53,11 @@ import java.awt.Color;
 import java.util.ArrayList;
 import java.util.Objects;
 import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.atomic.AtomicInteger;
+
+import static com.volmit.iris.util.data.registry.Particles.CRIT_MAGIC;
+import static com.volmit.iris.util.data.registry.Particles.REDSTONE;
 
 public class WandSVC implements IrisService {
-    private static final Particle CRIT_MAGIC = E.getOrDefault(Particle.class, "CRIT_MAGIC", "CRIT");
-    private static final Particle REDSTONE = E.getOrDefault(Particle.class,  "REDSTONE", "DUST");
     private static final int MS_PER_TICK = Integer.parseInt(System.getProperty("iris.ms_per_tick", "30"));
 
     private static ItemStack dust;

core/src/main/java/com/volmit/iris/core/tools/IrisCreator.java

@@ -22,6 +22,7 @@ import com.google.common.util.concurrent.AtomicDouble;
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.core.ServerConfigurator;
+import com.volmit.iris.core.nms.INMS;
 import com.volmit.iris.core.pregenerator.PregenTask;
 import com.volmit.iris.core.service.StudioSVC;
 import com.volmit.iris.engine.object.IrisDimension;
@@ -83,7 +84,11 @@ public class IrisCreator {
      * Benchmark mode
      */
     private boolean benchmark = false;
-    private boolean smartVanillaHeight = false;
+    /**
+     * Radius of chunks to pregenerate in the headless mode
+     * if set to -1, headless mode is disabled
+     */
+    private int headlessRadius = 10;
 
     public static boolean removeFromBukkitYml(String name) throws IOException {
         YamlConfiguration yml = YamlConfiguration.loadConfiguration(BUKKIT_YML);
@@ -127,7 +132,6 @@ public class IrisCreator {
             Iris.service(StudioSVC.class).installIntoWorld(sender, d.getLoadKey(), new File(Bukkit.getWorldContainer(), name()));
         }
 
-        PlatformChunkGenerator access;
         AtomicReference<World> world = new AtomicReference<>();
         AtomicDouble pp = new AtomicDouble(0);
         O<Boolean> done = new O<>();
@@ -137,34 +141,59 @@ public class IrisCreator {
                 .name(name)
                 .seed(seed)
                 .studio(studio)
-                .smartVanillaHeight(smartVanillaHeight)
                 .create();
         ServerConfigurator.installDataPacks(false);
 
-        access = (PlatformChunkGenerator) wc.generator();
-        PlatformChunkGenerator finalAccess1 = access;
+        PlatformChunkGenerator access = (PlatformChunkGenerator) wc.generator();
+        if (access == null) {
+            throw new IrisException("Access is null. Something bad happened.");
+        }
 
-        J.a(() ->
-        {
-            Supplier<Integer> g = () -> {
-                if (finalAccess1 == null || finalAccess1.getEngine() == null) {
-                    return 0;
+        if (headlessRadius > 0 && !benchmark) {
+            AtomicBoolean failed = new AtomicBoolean(false);
+            J.a(() -> {
+                int generated = access.getGenerated();
+                double total = Math.pow(headlessRadius * 2 + 1, 2);
+
+                while (generated < total) {
+                    if (failed.get()) return;
+
+                    double v = (double) generated / total;
+                    if (sender.isPlayer()) {
+                        sender.sendProgress(v, "Generating headless chunks");
+                        J.sleep(16);
+                    } else {
+                        sender.sendMessage(C.WHITE + "Generating headless chunks " + Form.pc(v) + ((C.GRAY + " (" + ((int) total - generated) + " Left)")));
+                        J.sleep(1000);
+                    }
+                    generated = access.getGenerated();
                 }
-                return finalAccess1.getEngine().getGenerated();
-            };
-            if(!benchmark) {
-                if (finalAccess1 == null) return;
-                int req = finalAccess1.getSpawnChunks().join();
+            });
 
-                while (g.get() < req) {
-                    double v = (double) g.get() / (double) req;
+            try {
+                access.prepareSpawnChunks(seed, headlessRadius);
+            } catch (Throwable e) {
+                Iris.error("Failed to prepare spawn chunks for " + name);
+                e.printStackTrace();
+                failed.set(true);
+            }
+        }
+
+        J.a(() -> {
+            if(!benchmark) {
+                int req = access.getSpawnChunks().join();
+
+                int generated = access.getGenerated();
+                while (generated < req) {
+                    double v = (double) generated / (double) req;
                     if (sender.isPlayer()) {
                         sender.sendProgress(v, "Generating");
                         J.sleep(16);
                     } else {
-                        sender.sendMessage(C.WHITE + "Generating " + Form.pc(v) + ((C.GRAY + " (" + (req - g.get()) + " Left)")));
+                        sender.sendMessage(C.WHITE + "Generating " + Form.pc(v) + ((C.GRAY + " (" + (req - generated) + " Left)")));
                         J.sleep(1000);
                     }
+                    generated = access.getGenerated();
                 }
             }
         });
@@ -172,7 +201,7 @@ public class IrisCreator {
 
         try {
             J.sfut(() -> {
-                world.set(wc.createWorld());
+                world.set(INMS.get().createWorld(wc));
             }).get();
         } catch (Throwable e) {
             e.printStackTrace();

core/src/main/java/com/volmit/iris/core/tools/IrisPackBenchmarking.java

@@ -2,13 +2,22 @@ package com.volmit.iris.core.tools;
 
 
 import com.volmit.iris.Iris;
+import com.volmit.iris.core.IrisSettings;
+import com.volmit.iris.core.loader.IrisData;
 import com.volmit.iris.core.pregenerator.PregenTask;
+import com.volmit.iris.core.pregenerator.methods.HeadlessPregenMethod;
+import com.volmit.iris.core.pregenerator.methods.HybridPregenMethod;
+import com.volmit.iris.core.service.StudioSVC;
+import com.volmit.iris.engine.IrisEngine;
 import com.volmit.iris.engine.framework.Engine;
+import com.volmit.iris.engine.framework.EngineTarget;
 import com.volmit.iris.engine.object.IrisDimension;
+import com.volmit.iris.engine.object.IrisWorld;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.exceptions.IrisException;
 import com.volmit.iris.util.format.Form;
+import com.volmit.iris.util.io.IO;
 import com.volmit.iris.util.scheduling.J;
 import com.volmit.iris.util.scheduling.PrecisionStopwatch;
 import lombok.Getter;
@@ -17,11 +26,6 @@ import org.bukkit.Bukkit;
 import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
-import java.nio.file.FileVisitResult;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.SimpleFileVisitor;
-import java.nio.file.attribute.BasicFileAttributes;
 import java.time.Clock;
 import java.time.LocalDateTime;
 import java.util.Collections;
@@ -33,13 +37,16 @@ public class IrisPackBenchmarking {
     public static boolean benchmarkInProgress = false;
     private final PrecisionStopwatch stopwatch = new PrecisionStopwatch();
     private final IrisDimension dimension;
-    private final int radius;
+    private final int diameter;
     private final boolean gui;
+    private final boolean headless;
+    private transient Engine engine;
 
-    public IrisPackBenchmarking(IrisDimension dimension, int radius, boolean gui) {
+    public IrisPackBenchmarking(IrisDimension dimension, int diameter, boolean headless, boolean gui) {
         instance = this;
         this.dimension = dimension;
-        this.radius = radius;
+        this.diameter = diameter;
+        this.headless = headless;
         this.gui = gui;
         runBenchmark();
     }
@@ -50,12 +57,9 @@ public class IrisPackBenchmarking {
                 .start(() -> {
                     Iris.info("Setting up benchmark environment ");
                     benchmarkInProgress = true;
-                    File file = new File("benchmark");
-                    if (file.exists()) {
-                        deleteDirectory(file.toPath());
-                    }
+                    IO.delete(new File(Bukkit.getWorldContainer(), "benchmark"));
                     createBenchmark();
-                    while (!IrisToolbelt.isIrisWorld(Bukkit.getWorld("benchmark"))) {
+                    while (!headless && !IrisToolbelt.isIrisWorld(Bukkit.getWorld("benchmark"))) {
                         J.sleep(1000);
                         Iris.debug("Iris PackBenchmark: Waiting...");
                     }
@@ -73,7 +77,6 @@ public class IrisPackBenchmarking {
     public void finishedBenchmark(KList<Integer> cps) {
         try {
             String time = Form.duration(stopwatch.getMillis());
-            Engine engine = IrisToolbelt.access(Bukkit.getWorld("benchmark")).getEngine();
             Iris.info("-----------------");
             Iris.info("Results:");
             Iris.info("- Total time: " + time);
@@ -114,12 +117,16 @@ public class IrisPackBenchmarking {
                 e.printStackTrace();
             }
 
-            J.s(() -> {
-                var world = Bukkit.getWorld("benchmark");
-                if (world == null) return;
-                IrisToolbelt.evacuate(world);
-                Bukkit.unloadWorld(world, true);
-            });
+            if (headless) {
+                engine.close();
+            } else {
+                J.s(() -> {
+                    var world = Bukkit.getWorld("benchmark");
+                    if (world == null) return;
+                    IrisToolbelt.evacuate(world);
+                    Bukkit.unloadWorld(world, true);
+                });
+            }
 
             stopwatch.end();
         } catch (Exception e) {
@@ -130,13 +137,34 @@ public class IrisPackBenchmarking {
 
     private void createBenchmark() {
         try {
-            IrisToolbelt.createWorld()
+            if (headless) {
+                Iris.info("Using headless benchmark!");
+                IrisWorld world = IrisWorld.builder()
+                        .name("benchmark")
+                        .minHeight(dimension.getMinHeight())
+                        .maxHeight(dimension.getMaxHeight())
+                        .seed(1337)
+                        .worldFolder(new File(Bukkit.getWorldContainer(), "benchmark"))
+                        .environment(dimension.getEnvironment())
+                        .build();
+                Iris.service(StudioSVC.class).installIntoWorld(
+                        Iris.getSender(),
+                        dimension.getLoadKey(),
+                        world.worldFolder());
+                var data = IrisData.get(new File(world.worldFolder(), "iris/pack"));
+                var dim = data.getDimensionLoader().load(dimension.getLoadKey());
+                engine = new IrisEngine(new EngineTarget(world, dim, data), false);
+                return;
+            }
+
+            engine = IrisToolbelt.access(IrisToolbelt.createWorld()
                     .dimension(dimension.getLoadKey())
                     .name("benchmark")
                     .seed(1337)
                     .studio(false)
                     .benchmark(true)
-                    .create();
+                    .create())
+                    .getEngine();
         } catch (IrisException e) {
             throw new RuntimeException(e);
         }
@@ -146,9 +174,15 @@ public class IrisPackBenchmarking {
         IrisToolbelt.pregenerate(PregenTask
                 .builder()
                 .gui(gui)
-                .width(radius)
-                .height(radius)
-                .build(), Bukkit.getWorld("benchmark")
+                .radiusX(diameter)
+                .radiusZ(diameter)
+                .build(), headless ?
+                new HeadlessPregenMethod(engine) :
+                new HybridPregenMethod(
+                        engine.getWorld().realWorld(),
+                        IrisSettings.getThreadCount(IrisSettings.get().getConcurrency().getParallelism())
+                ),
+                engine
         );
     }
 
@@ -178,26 +212,4 @@ public class IrisPackBenchmarking {
     private int findHighest(KList<Integer> list) {
         return Collections.max(list);
     }
-
-    private boolean deleteDirectory(Path dir) {
-        try {
-            Files.walkFileTree(dir, new SimpleFileVisitor<>() {
-                @Override
-                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
-                    Files.delete(file);
-                    return FileVisitResult.CONTINUE;
-                }
-
-                @Override
-                public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
-                    Files.delete(dir);
-                    return FileVisitResult.CONTINUE;
-                }
-            });
-            return true;
-        } catch (IOException e) {
-            e.printStackTrace();
-            return false;
-        }
-    }
 }

core/src/main/java/com/volmit/iris/core/tools/IrisWorldCreator.java

@@ -21,10 +21,13 @@ package com.volmit.iris.core.tools;
 import com.volmit.iris.core.loader.IrisData;
 import com.volmit.iris.engine.object.*;
 import com.volmit.iris.engine.platform.BukkitChunkGenerator;
+import com.volmit.iris.util.reflect.WrappedField;
 import org.bukkit.Bukkit;
 import org.bukkit.World;
 import org.bukkit.WorldCreator;
+import org.bukkit.WorldType;
 import org.bukkit.generator.ChunkGenerator;
+import sun.misc.Unsafe;
 
 import java.io.File;
 
@@ -32,7 +35,6 @@ public class IrisWorldCreator {
     private String name;
     private boolean studio = false;
     private String dimensionName = null;
-    private boolean smartVanillaHeight = false;
     private long seed = 1337;
 
     public IrisWorldCreator() {
@@ -64,11 +66,6 @@ public class IrisWorldCreator {
         return this;
     }
 
-    public IrisWorldCreator smartVanillaHeight(boolean smartVanillaHeight) {
-        this.smartVanillaHeight = smartVanillaHeight;
-        return this;
-    }
-
     public WorldCreator create() {
         IrisDimension dim = IrisData.loadAnyDimension(dimensionName);
 
@@ -82,7 +79,7 @@ public class IrisWorldCreator {
                 .build();
         ChunkGenerator g = new BukkitChunkGenerator(w, studio, studio
                 ? dim.getLoader().getDataFolder() :
-                new File(w.worldFolder(), "iris/pack"), dimensionName, smartVanillaHeight);
+                new File(w.worldFolder(), "iris/pack"), dimensionName);
 
 
         return new WorldCreator(name)

core/src/main/java/com/volmit/iris/core/wand/WandSelection.java

@@ -20,8 +20,6 @@ package com.volmit.iris.core.wand;
 
 import com.volmit.iris.util.data.Cuboid;
 import com.volmit.iris.util.math.M;
-import com.volmit.iris.util.math.RNG;
-import com.volmit.iris.util.misc.E;
 import org.bukkit.Location;
 import org.bukkit.Particle;
 import org.bukkit.entity.Player;
@@ -29,8 +27,9 @@ import org.bukkit.util.Vector;
 
 import java.awt.*;
 
+import static com.volmit.iris.util.data.registry.Particles.REDSTONE;
+
 public class WandSelection {
-    private static final Particle REDSTONE = E.getOrDefault(Particle.class, "REDSTONE", "DUST");
     private final Cuboid c;
     private final Player p;
     private static final double STEP = 0.10;

core/src/main/java/com/volmit/iris/engine/IrisEngine.java

@@ -21,10 +21,10 @@ package com.volmit.iris.engine;
 import com.google.common.util.concurrent.AtomicDouble;
 import com.google.gson.Gson;
 import com.volmit.iris.Iris;
-import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.core.ServerConfigurator;
 import com.volmit.iris.core.events.IrisEngineHotloadEvent;
 import com.volmit.iris.core.gui.PregeneratorJob;
+import com.volmit.iris.core.loader.ResourceLoader;
 import com.volmit.iris.core.nms.container.BlockPos;
 import com.volmit.iris.core.nms.container.Pair;
 import com.volmit.iris.core.project.IrisProject;
@@ -53,7 +53,6 @@ import com.volmit.iris.util.scheduling.PrecisionStopwatch;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.ToString;
-import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.block.Biome;
 import org.bukkit.block.data.BlockData;
@@ -63,11 +62,10 @@ import java.io.File;
 import java.io.IOException;
 import java.util.HashSet;
 import java.util.Set;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 
 @Data
 @EqualsAndHashCode(exclude = "context")
@@ -92,6 +90,7 @@ public class IrisEngine implements Engine {
     private final AtomicBoolean cleaning;
     private final ChronoLatch cleanLatch;
     private final SeedManager seedManager;
+    private CompletableFuture<Long> hash32;
     private EngineMode mode;
     private EngineEffects effects;
     private EngineExecutionEnvironment execution;
@@ -174,8 +173,17 @@ public class IrisEngine implements Engine {
             complex = new IrisComplex(this);
             execution = new IrisExecutionEnvironment(this);
             effects = new IrisEngineEffects(this);
+            hash32 = new CompletableFuture<>();
             setupMode();
             J.a(this::computeBiomeMaxes);
+            J.a(() -> {
+                File[] roots = getData().getLoaders()
+                        .values()
+                        .stream()
+                        .map(ResourceLoader::getRoot)
+                        .toArray(File[]::new);
+                hash32.complete(IO.hashRecursive(roots));
+            });
         } catch (Throwable e) {
             Iris.error("FAILED TO SETUP ENGINE!");
             e.printStackTrace();
@@ -296,6 +304,11 @@ public class IrisEngine implements Engine {
         return generated.get();
     }
 
+    @Override
+    public void addGenerated(int x, int z) {
+        generated.incrementAndGet();
+    }
+
     @Override
     public double getGeneratedPerSecond() {
         if (perSecondLatch.flip()) {

core/src/main/java/com/volmit/iris/engine/IrisWorldManager.java

@@ -62,6 +62,7 @@ import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
 import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.Predicate;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
@@ -299,28 +300,6 @@ public class IrisWorldManager extends EngineAssignedWorldManager {
             energy += 1.2;
         }
 
-        //@builder
-        IrisBiome biome = IrisSettings.get().getWorld().isAnbientEntitySpawningSystem()
-                ? getEngine().getSurfaceBiome(c) : null;
-        IrisEntitySpawn v = IrisSettings.get().getWorld().isAnbientEntitySpawningSystem()
-                ? spawnRandomly(Stream.concat(getData().getSpawnerLoader()
-                                .loadAll(getDimension().getEntitySpawners())
-                                .shuffleCopy(RNG.r).stream()
-                                .filter(this::canSpawn)
-                                .filter((i) -> i.isValid(biome))
-                                .flatMap((i) -> stream(i, initial)),
-                        Stream.concat(getData().getSpawnerLoader()
-                                        .loadAll(getEngine().getRegion(c.getX() << 4, c.getZ() << 4).getEntitySpawners())
-                                        .shuffleCopy(RNG.r).stream().filter(this::canSpawn)
-                                        .flatMap((i) -> stream(i, initial)),
-                                getData().getSpawnerLoader()
-                                        .loadAll(getEngine().getSurfaceBiome(c.getX() << 4, c.getZ() << 4).getEntitySpawners())
-                                        .shuffleCopy(RNG.r).stream().filter(this::canSpawn)
-                                        .flatMap((i) -> stream(i, initial))))
-                .collect(Collectors.toList()))
-                .popRandom(RNG.r) : null;
-        //@done
-
         if (IrisSettings.get().getWorld().isMarkerEntitySpawningSystem()) {
             getSpawnersFromMarkers(c).forEach((blockf, spawners) -> {
                 if (spawners.isEmpty()) {
@@ -335,94 +314,67 @@ public class IrisWorldManager extends EngineAssignedWorldManager {
             });
         }
 
-        if (v != null && v.getReferenceSpawner() != null) {
-            int maxEntCount = v.getReferenceSpawner().getMaxEntitiesPerChunk();
+        if (!IrisSettings.get().getWorld().isAnbientEntitySpawningSystem()) {
+            return;
+        }
 
-            for (Entity i : c.getEntities()) {
-                if (i instanceof LivingEntity) {
-                    if (-maxEntCount <= 0) {
-                        return;
-                    }
-                }
-            }
+        //@builder
+        Predicate<IrisSpawner> filter = i -> i.canSpawn(getEngine(), c.getX(), c.getZ());
+        ChunkCounter counter = new ChunkCounter(c.getEntities());
 
-            try {
-                spawn(c, v);
-            } catch (Throwable e) {
-                J.s(() -> spawn(c, v));
-            }
+        IrisBiome biome = getEngine().getSurfaceBiome(c);
+        IrisEntitySpawn v = spawnRandomly(Stream.concat(getData().getSpawnerLoader()
+                                .loadAll(getDimension().getEntitySpawners())
+                                .shuffleCopy(RNG.r)
+                                .stream()
+                                .filter(filter)
+                                .filter((i) -> i.isValid(biome)),
+                        Stream.concat(getData()
+                                        .getSpawnerLoader()
+                                        .loadAll(getEngine().getRegion(c.getX() << 4, c.getZ() << 4).getEntitySpawners())
+                                        .shuffleCopy(RNG.r)
+                                        .stream()
+                                        .filter(filter),
+                                getData().getSpawnerLoader()
+                                        .loadAll(getEngine().getSurfaceBiome(c.getX() << 4, c.getZ() << 4).getEntitySpawners())
+                                        .shuffleCopy(RNG.r)
+                                        .stream()
+                                        .filter(filter)))
+                .filter(counter)
+                .flatMap((i) -> stream(i, initial))
+                .collect(Collectors.toList()))
+                .getRandom();
+        //@done
+        if (v == null || v.getReferenceSpawner() == null)
+            return;
+
+        try {
+            spawn(c, v);
+        } catch (Throwable e) {
+            J.s(() -> spawn(c, v));
         }
     }
 
     private void spawn(Chunk c, IrisEntitySpawn i) {
-        boolean allow = true;
-
-        if (!i.getReferenceSpawner().getMaximumRatePerChunk().isInfinite()) {
-            allow = false;
-            IrisEngineChunkData cd = getEngine().getEngineData().getChunk(c.getX(), c.getZ());
-            IrisEngineSpawnerCooldown sc = null;
-            for (IrisEngineSpawnerCooldown j : cd.getCooldowns()) {
-                if (j.getSpawner().equals(i.getReferenceSpawner().getLoadKey())) {
-                    sc = j;
-                    break;
-                }
-            }
-
-            if (sc == null) {
-                sc = new IrisEngineSpawnerCooldown();
-                sc.setSpawner(i.getReferenceSpawner().getLoadKey());
-                cd.getCooldowns().add(sc);
-            }
-
-            if (sc.canSpawn(i.getReferenceSpawner().getMaximumRatePerChunk())) {
-                sc.spawn(getEngine());
-                allow = true;
-            }
-        }
-
-        if (allow) {
-            int s = i.spawn(getEngine(), c, RNG.r);
-            actuallySpawned += s;
-            if (s > 0) {
-                getCooldown(i.getReferenceSpawner()).spawn(getEngine());
-                energy -= s * ((i.getEnergyMultiplier() * i.getReferenceSpawner().getEnergyMultiplier() * 1));
-            }
+        IrisSpawner ref = i.getReferenceSpawner();
+        int s = i.spawn(getEngine(), c, RNG.r);
+        actuallySpawned += s;
+        if (s > 0) {
+            ref.spawn(getEngine(), c.getX(), c.getZ());
+            energy -= s * ((i.getEnergyMultiplier() * ref.getEnergyMultiplier() * 1));
         }
     }
 
-    private void spawn(IrisPosition c, IrisEntitySpawn i) {
-        boolean allow = true;
+    private void spawn(IrisPosition pos, IrisEntitySpawn i) {
+        IrisSpawner ref = i.getReferenceSpawner();
+        if (!ref.canSpawn(getEngine(), pos.getX() >> 4, pos.getZ()))
+            return;
 
-        if (!i.getReferenceSpawner().getMaximumRatePerChunk().isInfinite()) {
-            allow = false;
-            IrisEngineChunkData cd = getEngine().getEngineData().getChunk(c.getX() >> 4, c.getZ() >> 4);
-            IrisEngineSpawnerCooldown sc = null;
-            for (IrisEngineSpawnerCooldown j : cd.getCooldowns()) {
-                if (j.getSpawner().equals(i.getReferenceSpawner().getLoadKey())) {
-                    sc = j;
-                    break;
-                }
-            }
-
-            if (sc == null) {
-                sc = new IrisEngineSpawnerCooldown();
-                sc.setSpawner(i.getReferenceSpawner().getLoadKey());
-                cd.getCooldowns().add(sc);
-            }
-
-            if (sc.canSpawn(i.getReferenceSpawner().getMaximumRatePerChunk())) {
-                sc.spawn(getEngine());
-                allow = true;
-            }
-        }
-
-        if (allow) {
-            int s = i.spawn(getEngine(), c, RNG.r);
-            actuallySpawned += s;
-            if (s > 0) {
-                getCooldown(i.getReferenceSpawner()).spawn(getEngine());
-                energy -= s * ((i.getEnergyMultiplier() * i.getReferenceSpawner().getEnergyMultiplier() * 1));
-            }
+        int s = i.spawn(getEngine(), pos, RNG.r);
+        actuallySpawned += s;
+        if (s > 0) {
+            ref.spawn(getEngine(), pos.getX() >> 4, pos.getZ() >> 4);
+            energy -= s * ((i.getEnergyMultiplier() * ref.getEnergyMultiplier() * 1));
         }
     }
 
@@ -450,31 +402,6 @@ public class IrisWorldManager extends EngineAssignedWorldManager {
         return rarityTypes;
     }
 
-    public boolean canSpawn(IrisSpawner i) {
-        return i.isValid(getEngine().getWorld().realWorld())
-                && getCooldown(i).canSpawn(i.getMaximumRate());
-    }
-
-    private IrisEngineSpawnerCooldown getCooldown(IrisSpawner i) {
-        IrisEngineData ed = getEngine().getEngineData();
-        IrisEngineSpawnerCooldown cd = null;
-
-        for (IrisEngineSpawnerCooldown j : ed.getSpawnerCooldowns().copy()) {
-            if (j.getSpawner().equals(i.getLoadKey())) {
-                cd = j;
-            }
-        }
-
-        if (cd == null) {
-            cd = new IrisEngineSpawnerCooldown();
-            cd.setSpawner(i.getLoadKey());
-            cd.setLastSpawn(M.ms() - i.getMaximumRate().getInterval());
-            ed.getSpawnerCooldowns().add(cd);
-        }
-
-        return cd;
-    }
-
     @Override
     public void onTick() {
 
@@ -708,4 +635,27 @@ public class IrisWorldManager extends EngineAssignedWorldManager {
 
         return (double) entityCount / (getEngine().getWorld().realWorld().getLoadedChunks().length + 1) * 1.28;
     }
+
+    @Data
+    private static class ChunkCounter implements Predicate<IrisSpawner> {
+        private final Entity[] entities;
+        private transient int index = 0;
+        private transient int count = 0;
+
+        @Override
+        public boolean test(IrisSpawner spawner) {
+            int max = spawner.getMaxEntitiesPerChunk();
+            if (max <= count)
+                return false;
+
+            while (index < entities.length) {
+                if (entities[index++] instanceof LivingEntity) {
+                    if (++count >= max)
+                        return false;
+                }
+            }
+
+            return true;
+        }
+    }
 }

core/src/main/java/com/volmit/iris/engine/data/chunk/LinkedTerrainChunk.java

@@ -21,7 +21,7 @@ package com.volmit.iris.engine.data.chunk;
 import com.volmit.iris.core.nms.BiomeBaseInjector;
 import com.volmit.iris.core.nms.INMS;
 import com.volmit.iris.util.data.IrisBiomeStorage;
-import com.volmit.iris.util.data.IrisBlockData;
+import com.volmit.iris.util.data.IrisCustomData;
 import lombok.Setter;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
@@ -121,7 +121,7 @@ public class LinkedTerrainChunk implements TerrainChunk {
 
     @Override
     public synchronized void setBlock(int x, int y, int z, BlockData blockData) {
-        if (blockData instanceof IrisBlockData d)
+        if (blockData instanceof IrisCustomData d)
             blockData = d.getBase();
         rawChunkData.setBlock(x, y, z, blockData);
     }

core/src/main/java/com/volmit/iris/engine/data/chunk/MCATerrainChunk.java

@@ -20,7 +20,7 @@ package com.volmit.iris.engine.data.chunk;
 
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.nms.BiomeBaseInjector;
-import com.volmit.iris.util.data.IrisBlockData;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.nbt.mca.Chunk;
 import com.volmit.iris.util.nbt.mca.NBTWorld;
 import lombok.AllArgsConstructor;
@@ -89,7 +89,7 @@ public class MCATerrainChunk implements TerrainChunk {
         if (blockData == null) {
             Iris.error("NULL BD");
         }
-        if (blockData instanceof IrisBlockData data)
+        if (blockData instanceof IrisCustomData data)
             blockData = data.getBase();
 
         mcaChunk.setBlockStateAt(xx, y, zz, NBTWorld.getCompound(blockData), false);

core/src/main/java/com/volmit/iris/engine/decorator/IrisCeilingDecorator.java

@@ -18,18 +18,16 @@
 
 package com.volmit.iris.engine.decorator;
 
-import com.volmit.iris.engine.data.cache.Cache;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.object.IrisBiome;
 import com.volmit.iris.engine.object.IrisDecorationPart;
 import com.volmit.iris.engine.object.IrisDecorator;
-import com.volmit.iris.util.data.B;
 import com.volmit.iris.util.documentation.BlockCoordinates;
 import com.volmit.iris.util.hunk.Hunk;
+import com.volmit.iris.util.math.RNG;
 import org.bukkit.Material;
 import org.bukkit.block.BlockFace;
 import org.bukkit.block.data.BlockData;
-import org.bukkit.block.data.MultipleFacing;
 import org.bukkit.block.data.type.PointedDripstone;
 
 public class IrisCeilingDecorator extends IrisEngineDecorator {
@@ -40,12 +38,14 @@ public class IrisCeilingDecorator extends IrisEngineDecorator {
     @BlockCoordinates
     @Override
     public void decorate(int x, int z, int realX, int realX1, int realX_1, int realZ, int realZ1, int realZ_1, Hunk<BlockData> data, IrisBiome biome, int height, int max) {
-        IrisDecorator decorator = getDecorator(biome, realX, realZ);
+        RNG rng = getRNG(realX, realZ);
+        IrisDecorator decorator = getDecorator(rng, biome, realX, realZ);
+
         if (decorator != null) {
             if (!decorator.isStacking()) {
-                data.set(x, height, z, fixFaces(decorator.getBlockData100(biome, getRng(), realX, height, realZ, getData()), realX, height, realZ));
+                data.set(x, height, z, fixFaces(decorator.getBlockData100(biome, rng, realX, height, realZ, getData()), data, x, z, realX, height, realZ));
             } else {
-                int stack = decorator.getHeight(getRng().nextParallelRNG(Cache.key(realX, realZ)), realX, realZ, getData());
+                int stack = decorator.getHeight(rng, realX, realZ, getData());
                 if (decorator.isScaleStack()) {
                     stack = Math.min((int) Math.ceil((double) max * ((double) stack / 100)), decorator.getAbsoluteMaxStack());
                 } else {
@@ -53,7 +53,7 @@ public class IrisCeilingDecorator extends IrisEngineDecorator {
                 }
 
                 if (stack == 1) {
-                    data.set(x, height, z, decorator.getBlockDataForTop(biome, getRng(), realX, height, realZ, getData()));
+                    data.set(x, height, z, decorator.getBlockDataForTop(biome, rng, realX, height, realZ, getData()));
                     return;
                 }
 
@@ -66,8 +66,8 @@ public class IrisCeilingDecorator extends IrisEngineDecorator {
                     double threshold = (((double) i) / (double) (stack - 1));
 
                     BlockData bd = threshold >= decorator.getTopThreshold() ?
-                            decorator.getBlockDataForTop(biome, getRng(), realX, h, realZ, getData()) :
-                            decorator.getBlockData100(biome, getRng(), realX, h, realZ, getData());
+                            decorator.getBlockDataForTop(biome, rng, realX, h, realZ, getData()) :
+                            decorator.getBlockData100(biome, rng, realX, h, realZ, getData());
 
                     if (bd instanceof PointedDripstone) {
                         PointedDripstone.Thickness th = PointedDripstone.Thickness.BASE;
@@ -97,24 +97,4 @@ public class IrisCeilingDecorator extends IrisEngineDecorator {
             }
         }
     }
-
-    private BlockData fixFaces(BlockData b, int x, int y, int z) {
-        if (B.isVineBlock(b)) {
-            MultipleFacing data = (MultipleFacing) b.clone();
-            boolean found = false;
-            for (BlockFace f : BlockFace.values()) {
-                if (!f.isCartesian())
-                    continue;
-                Material m = getEngine().getMantle().get(x + f.getModX(), y + f.getModY(), z + f.getModZ()).getMaterial();
-                if (m.isSolid()) {
-                    found = true;
-                    data.setFace(f, m.isSolid());
-                }
-            }
-            if (!found)
-                data.setFace(BlockFace.UP, true);
-            return data;
-        }
-        return b;
-    }
 }

core/src/main/java/com/volmit/iris/engine/decorator/IrisEngineDecorator.java

@@ -19,7 +19,6 @@
 package com.volmit.iris.engine.decorator;
 
 import com.volmit.iris.Iris;
-import com.volmit.iris.engine.data.cache.Cache;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.framework.EngineAssignedComponent;
 import com.volmit.iris.engine.framework.EngineDecorator;
@@ -27,30 +26,42 @@ import com.volmit.iris.engine.object.IrisBiome;
 import com.volmit.iris.engine.object.IrisDecorationPart;
 import com.volmit.iris.engine.object.IrisDecorator;
 import com.volmit.iris.util.collection.KList;
+import com.volmit.iris.util.data.B;
+import com.volmit.iris.util.hunk.Hunk;
+import com.volmit.iris.util.documentation.BlockCoordinates;
 import com.volmit.iris.util.math.RNG;
 import lombok.Getter;
+import org.bukkit.block.BlockFace;
+import org.bukkit.block.BlockSupport;
+import org.bukkit.block.data.BlockData;
+import org.bukkit.block.data.MultipleFacing;
 
 public abstract class IrisEngineDecorator extends EngineAssignedComponent implements EngineDecorator {
-
-    @Getter
-    private final RNG rng;
-
     @Getter
     private final IrisDecorationPart part;
+    private final long seed;
+    private final long modX, modZ;
 
     public IrisEngineDecorator(Engine engine, String name, IrisDecorationPart part) {
         super(engine, name + " Decorator");
         this.part = part;
-        this.rng = new RNG(getSeed() + 29356788 - (part.ordinal() * 10439677L));
+        this.seed = getSeed() + 29356788 - (part.ordinal() * 10439677L);
+        this.modX = 29356788 ^ (part.ordinal() + 6);
+        this.modZ = 10439677 ^ (part.ordinal() + 1);
     }
 
-    protected IrisDecorator getDecorator(IrisBiome biome, double realX, double realZ) {
-        KList<IrisDecorator> v = new KList<>();
-        RNG rng = new RNG(Cache.key((int) realX, (int) realZ));
+    @BlockCoordinates
+    protected RNG getRNG(int x, int z) {
+        return new RNG(x * modX + z * modZ + seed);
+    }
 
+    protected IrisDecorator getDecorator(RNG rng, IrisBiome biome, double realX, double realZ) {
+        KList<IrisDecorator> v = new KList<>();
+
+        RNG gRNG = new RNG(seed);
         for (IrisDecorator i : biome.getDecorators()) {
             try {
-                if (i.getPartOf().equals(part) && i.getBlockData(biome, this.rng, realX, realZ, getData()) != null) {
+                if (i.getPartOf().equals(part) && i.getBlockData(biome, gRNG, realX, realZ, getData()) != null) {
                     v.add(i);
                 }
             } catch (Throwable e) {
@@ -65,4 +76,40 @@ public abstract class IrisEngineDecorator extends EngineAssignedComponent implem
 
         return null;
     }
+
+    protected BlockData fixFaces(BlockData b, Hunk<BlockData> hunk, int rX, int rZ, int x, int y, int z) {
+        if (B.isVineBlock(b)) {
+            MultipleFacing data = (MultipleFacing) b.clone();
+            data.getFaces().forEach(f -> data.setFace(f, false));
+
+            boolean found = false;
+            for (BlockFace f : BlockFace.values()) {
+                if (!f.isCartesian())
+                    continue;
+                int yy = y + f.getModY();
+
+                BlockData r = getEngine().getMantle().get(x + f.getModX(), yy, z + f.getModZ());
+                if (r.isFaceSturdy(f.getOppositeFace(), BlockSupport.FULL)) {
+                    found = true;
+                    data.setFace(f, true);
+                    continue;
+                }
+
+                int xx = rX + f.getModX();
+                int zz = rZ + f.getModZ();
+                if (xx < 0 || xx > 15 || zz < 0 || zz > 15 || yy < 0 || yy > hunk.getHeight())
+                    continue;
+
+                r = hunk.get(xx, yy, zz);
+                if (r.isFaceSturdy(f.getOppositeFace(), BlockSupport.FULL)) {
+                    found = true;
+                    data.setFace(f, true);
+                }
+            }
+            if (!found)
+                data.setFace(BlockFace.DOWN, true);
+            return data;
+        }
+        return b;
+    }
 }

core/src/main/java/com/volmit/iris/engine/decorator/IrisSeaFloorDecorator.java

@@ -18,13 +18,13 @@
 
 package com.volmit.iris.engine.decorator;
 
-import com.volmit.iris.engine.data.cache.Cache;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.object.IrisBiome;
 import com.volmit.iris.engine.object.IrisDecorationPart;
 import com.volmit.iris.engine.object.IrisDecorator;
 import com.volmit.iris.util.documentation.BlockCoordinates;
 import com.volmit.iris.util.hunk.Hunk;
+import com.volmit.iris.util.math.RNG;
 import org.bukkit.block.data.BlockData;
 
 public class IrisSeaFloorDecorator extends IrisEngineDecorator {
@@ -35,7 +35,8 @@ public class IrisSeaFloorDecorator extends IrisEngineDecorator {
     @BlockCoordinates
     @Override
     public void decorate(int x, int z, int realX, int realX1, int realX_1, int realZ, int realZ1, int realZ_1, Hunk<BlockData> data, IrisBiome biome, int height, int max) {
-        IrisDecorator decorator = getDecorator(biome, realX, realZ);
+        RNG rng = getRNG(realX, realZ);
+        IrisDecorator decorator = getDecorator(rng, biome, realX, realZ);
 
         if (decorator != null) {
             if (!decorator.isStacking()) {
@@ -44,17 +45,17 @@ public class IrisSeaFloorDecorator extends IrisEngineDecorator {
                     return;
                 }
                 if (height >= 0 || height < getEngine().getHeight()) {
-                    data.set(x, height, z, decorator.getBlockData100(biome, getRng(), realX, height, realZ, getData()));
+                    data.set(x, height, z, decorator.getBlockData100(biome, rng, realX, height, realZ, getData()));
                 }
             } else {
-                int stack = decorator.getHeight(getRng().nextParallelRNG(Cache.key(realX, realZ)), realX, realZ, getData());
+                int stack = decorator.getHeight(rng, realX, realZ, getData());
                 if (decorator.isScaleStack()) {
                     int maxStack = max - height;
                     stack = (int) Math.ceil((double) maxStack * ((double) stack / 100));
                 } else stack = Math.min(stack, max - height);
 
                 if (stack == 1) {
-                    data.set(x, height, z, decorator.getBlockDataForTop(biome, getRng(), realX, height, realZ, getData()));
+                    data.set(x, height, z, decorator.getBlockDataForTop(biome, rng, realX, height, realZ, getData()));
                     return;
                 }
 
@@ -66,8 +67,8 @@ public class IrisSeaFloorDecorator extends IrisEngineDecorator {
 
                     double threshold = ((double) i) / (stack - 1);
                     data.set(x, h, z, threshold >= decorator.getTopThreshold() ?
-                            decorator.getBlockDataForTop(biome, getRng(), realX, h, realZ, getData()) :
-                            decorator.getBlockData100(biome, getRng(), realX, h, realZ, getData()));
+                            decorator.getBlockDataForTop(biome, rng, realX, h, realZ, getData()) :
+                            decorator.getBlockData100(biome, rng, realX, h, realZ, getData()));
                 }
             }
         }

core/src/main/java/com/volmit/iris/engine/decorator/IrisSeaSurfaceDecorator.java

@@ -18,13 +18,13 @@
 
 package com.volmit.iris.engine.decorator;
 
-import com.volmit.iris.engine.data.cache.Cache;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.object.IrisBiome;
 import com.volmit.iris.engine.object.IrisDecorationPart;
 import com.volmit.iris.engine.object.IrisDecorator;
 import com.volmit.iris.util.documentation.BlockCoordinates;
 import com.volmit.iris.util.hunk.Hunk;
+import com.volmit.iris.util.math.RNG;
 import org.bukkit.block.data.BlockData;
 
 public class IrisSeaSurfaceDecorator extends IrisEngineDecorator {
@@ -35,22 +35,23 @@ public class IrisSeaSurfaceDecorator extends IrisEngineDecorator {
     @BlockCoordinates
     @Override
     public void decorate(int x, int z, int realX, int realX1, int realX_1, int realZ, int realZ1, int realZ_1, Hunk<BlockData> data, IrisBiome biome, int height, int max) {
-        IrisDecorator decorator = getDecorator(biome, realX, realZ);
+        RNG rng = getRNG(realX, realZ);
+        IrisDecorator decorator = getDecorator(rng, biome, realX, realZ);
 
         if (decorator != null) {
             if (!decorator.isStacking()) {
                 if (height >= 0 || height < getEngine().getHeight()) {
-                    data.set(x, height + 1, z, decorator.getBlockData100(biome, getRng(), realX, height, realZ, getData()));
+                    data.set(x, height + 1, z, decorator.getBlockData100(biome, rng, realX, height, realZ, getData()));
                 }
             } else {
-                int stack = decorator.getHeight(getRng().nextParallelRNG(Cache.key(realX, realZ)), realX, realZ, getData());
+                int stack = decorator.getHeight(rng, realX, realZ, getData());
                 if (decorator.isScaleStack()) {
                     int maxStack = max - height;
                     stack = (int) Math.ceil((double) maxStack * ((double) stack / 100));
                 }
 
                 if (stack == 1) {
-                    data.set(x, height, z, decorator.getBlockDataForTop(biome, getRng(), realX, height, realZ, getData()));
+                    data.set(x, height, z, decorator.getBlockDataForTop(biome, rng, realX, height, realZ, getData()));
                     return;
                 }
 
@@ -62,8 +63,8 @@ public class IrisSeaSurfaceDecorator extends IrisEngineDecorator {
 
                     double threshold = ((double) i) / (stack - 1);
                     data.set(x, h + 1, z, threshold >= decorator.getTopThreshold() ?
-                            decorator.getBlockDataForTop(biome, getRng().nextParallelRNG(i), realX, h, realZ, getData()) :
-                            decorator.getBlockData100(biome, getRng().nextParallelRNG(i), realX, h, realZ, getData()));
+                            decorator.getBlockDataForTop(biome, rng, realX, h, realZ, getData()) :
+                            decorator.getBlockData100(biome, rng, realX, h, realZ, getData()));
                 }
             }
         }

core/src/main/java/com/volmit/iris/engine/decorator/IrisShoreLineDecorator.java

@@ -18,13 +18,13 @@
 
 package com.volmit.iris.engine.decorator;
 
-import com.volmit.iris.engine.data.cache.Cache;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.object.IrisBiome;
 import com.volmit.iris.engine.object.IrisDecorationPart;
 import com.volmit.iris.engine.object.IrisDecorator;
 import com.volmit.iris.util.documentation.BlockCoordinates;
 import com.volmit.iris.util.hunk.Hunk;
+import com.volmit.iris.util.math.RNG;
 import org.bukkit.block.data.BlockData;
 
 public class IrisShoreLineDecorator extends IrisEngineDecorator {
@@ -42,7 +42,8 @@ public class IrisShoreLineDecorator extends IrisEngineDecorator {
                     Math.round(getComplex().getHeightStream().get(realX, realZ1)) < getComplex().getFluidHeight() ||
                     Math.round(getComplex().getHeightStream().get(realX, realZ_1)) < getComplex().getFluidHeight()
             ) {
-                IrisDecorator decorator = getDecorator(biome, realX, realZ);
+                RNG rng = getRNG(realX, realZ);
+                IrisDecorator decorator = getDecorator(rng, biome, realX, realZ);
 
                 if (decorator != null) {
                     if (!decorator.isForcePlace() && !decorator.getSlopeCondition().isDefault()
@@ -51,16 +52,16 @@ public class IrisShoreLineDecorator extends IrisEngineDecorator {
                     }
 
                     if (!decorator.isStacking()) {
-                        data.set(x, height + 1, z, decorator.getBlockData100(biome, getRng(), realX, height, realZ, getData()));
+                        data.set(x, height + 1, z, decorator.getBlockData100(biome, rng, realX, height, realZ, getData()));
                     } else {
-                        int stack = decorator.getHeight(getRng().nextParallelRNG(Cache.key(realX, realZ)), realX, realZ, getData());
+                        int stack = decorator.getHeight(rng, realX, realZ, getData());
                         if (decorator.isScaleStack()) {
                             int maxStack = max - height;
                             stack = (int) Math.ceil((double) maxStack * ((double) stack / 100));
                         } else stack = Math.min(max - height, stack);
 
                         if (stack == 1) {
-                            data.set(x, height, z, decorator.getBlockDataForTop(biome, getRng(), realX, height, realZ, getData()));
+                            data.set(x, height, z, decorator.getBlockDataForTop(biome, rng, realX, height, realZ, getData()));
                             return;
                         }
 
@@ -68,8 +69,8 @@ public class IrisShoreLineDecorator extends IrisEngineDecorator {
                             int h = height + i;
                             double threshold = ((double) i) / (stack - 1);
                             data.set(x, h + 1, z, threshold >= decorator.getTopThreshold() ?
-                                    decorator.getBlockDataForTop(biome, getRng(), realX, h, realZ, getData()) :
-                                    decorator.getBlockData100(biome, getRng(), realX, h, realZ, getData()));
+                                    decorator.getBlockDataForTop(biome, rng, realX, h, realZ, getData()) :
+                                    decorator.getBlockData100(biome, rng, realX, h, realZ, getData()));
                         }
                     }
                 }

core/src/main/java/com/volmit/iris/engine/decorator/IrisSurfaceDecorator.java

@@ -19,7 +19,6 @@
 package com.volmit.iris.engine.decorator;
 
 import com.volmit.iris.Iris;
-import com.volmit.iris.engine.data.cache.Cache;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.object.InferredType;
 import com.volmit.iris.engine.object.IrisBiome;
@@ -28,11 +27,11 @@ import com.volmit.iris.engine.object.IrisDecorator;
 import com.volmit.iris.util.data.B;
 import com.volmit.iris.util.documentation.BlockCoordinates;
 import com.volmit.iris.util.hunk.Hunk;
+import com.volmit.iris.util.math.RNG;
 import org.bukkit.Material;
 import org.bukkit.block.BlockFace;
 import org.bukkit.block.data.Bisected;
 import org.bukkit.block.data.BlockData;
-import org.bukkit.block.data.MultipleFacing;
 import org.bukkit.block.data.type.PointedDripstone;
 
 public class IrisSurfaceDecorator extends IrisEngineDecorator {
@@ -48,7 +47,8 @@ public class IrisSurfaceDecorator extends IrisEngineDecorator {
         }
 
         BlockData bd, bdx;
-        IrisDecorator decorator = getDecorator(biome, realX, realZ);
+        RNG rng = getRNG(realX, realZ);
+        IrisDecorator decorator = getDecorator(rng, biome, realX, realZ);
         bdx = data.get(x, height, z);
         boolean underwater = height < getDimension().getFluidHeight();
 
@@ -59,7 +59,7 @@ public class IrisSurfaceDecorator extends IrisEngineDecorator {
             }
 
             if (!decorator.isStacking()) {
-                bd = decorator.getBlockData100(biome, getRng(), realX, height, realZ, getData());
+                bd = decorator.getBlockData100(biome, rng, realX, height, realZ, getData());
 
                 if (!underwater) {
                     if (!canGoOn(bd, bdx) && (!decorator.isForcePlace() && decorator.getForceBlock() == null)) {
@@ -68,12 +68,12 @@ public class IrisSurfaceDecorator extends IrisEngineDecorator {
                 }
 
                 if (decorator.getForceBlock() != null) {
-                    data.set(x, height, z, fixFaces(decorator.getForceBlock().getBlockData(getData()), x, height, z));
+                    data.set(x, height, z, fixFaces(decorator.getForceBlock().getBlockData(getData()), data, x, z, realX, height, realZ));
                 } else if (!decorator.isForcePlace()) {
                     if (decorator.getWhitelist() != null && decorator.getWhitelist().stream().noneMatch(d -> d.getBlockData(getData()).equals(bdx))) {
                         return;
                     }
-                    if (decorator.getBlacklist() != null && decorator.getWhitelist().stream().anyMatch(d -> d.getBlockData(getData()).equals(bdx))) {
+                    if (decorator.getBlacklist() != null && decorator.getBlacklist().stream().anyMatch(d -> d.getBlockData(getData()).equals(bdx))) {
                         return;
                     }
                 }
@@ -91,14 +91,14 @@ public class IrisSurfaceDecorator extends IrisEngineDecorator {
                 }
 
                 if (B.isAir(data.get(x, height + 1, z))) {
-                    data.set(x, height + 1, z, fixFaces(bd, x, height + 1, z));
+                    data.set(x, height + 1, z, fixFaces(bd, data, x, z, realX, height + 1, realZ));
                 }
             } else {
                 if (height < getDimension().getFluidHeight()) {
                     max = getDimension().getFluidHeight();
                 }
 
-                int stack = decorator.getHeight(getRng().nextParallelRNG(Cache.key(realX, realZ)), realX, realZ, getData());
+                int stack = decorator.getHeight(rng, realX, realZ, getData());
 
                 if (decorator.isScaleStack()) {
                     stack = Math.min((int) Math.ceil((double) max * ((double) stack / 100)), decorator.getAbsoluteMaxStack());
@@ -107,7 +107,7 @@ public class IrisSurfaceDecorator extends IrisEngineDecorator {
                 }
 
                 if (stack == 1) {
-                    data.set(x, height, z, decorator.getBlockDataForTop(biome, getRng(), realX, height, realZ, getData()));
+                    data.set(x, height, z, decorator.getBlockDataForTop(biome, rng, realX, height, realZ, getData()));
                     return;
                 }
 
@@ -115,8 +115,8 @@ public class IrisSurfaceDecorator extends IrisEngineDecorator {
                     int h = height + i;
                     double threshold = ((double) i) / (stack - 1);
                     bd = threshold >= decorator.getTopThreshold() ?
-                            decorator.getBlockDataForTop(biome, getRng(), realX, h, realZ, getData()) :
-                            decorator.getBlockData100(biome, getRng(), realX, h, realZ, getData());
+                            decorator.getBlockDataForTop(biome, rng, realX, h, realZ, getData()) :
+                            decorator.getBlockData100(biome, rng, realX, h, realZ, getData());
 
                     if (bd == null) {
                         break;
@@ -158,24 +158,4 @@ public class IrisSurfaceDecorator extends IrisEngineDecorator {
             }
         }
     }
-
-    private BlockData fixFaces(BlockData b, int x, int y, int z) {
-        if (B.isVineBlock(b)) {
-            MultipleFacing data = (MultipleFacing) b.clone();
-            boolean found = false;
-            for (BlockFace f : BlockFace.values()) {
-                if (!f.isCartesian())
-                    continue;
-                Material m = getEngine().getMantle().get(x + f.getModX(), y + f.getModY(), z + f.getModZ()).getMaterial();
-                if (m.isSolid()) {
-                    found = true;
-                    data.setFace(f, m.isSolid());
-                }
-            }
-            if (!found)
-                data.setFace(BlockFace.UP, true);
-            return data;
-        }
-        return b;
-    }
 }

core/src/main/java/com/volmit/iris/engine/framework/Engine.java

@@ -42,7 +42,7 @@ import com.volmit.iris.util.context.ChunkContext;
 import com.volmit.iris.util.context.IrisContext;
 import com.volmit.iris.util.data.B;
 import com.volmit.iris.util.data.DataProvider;
-import com.volmit.iris.util.data.IrisBlockData;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.documentation.BlockCoordinates;
 import com.volmit.iris.util.documentation.ChunkCoordinates;
 import com.volmit.iris.util.format.C;
@@ -80,6 +80,7 @@ import java.awt.Color;
 import java.util.Arrays;
 import java.util.Set;
 import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -258,10 +259,8 @@ public interface Engine extends DataProvider, Fallible, LootProvider, BlockUpdat
         if (B.isUpdatable(data)) {
             getMantle().updateBlock(x, y, z);
         }
-        if (data instanceof IrisBlockData d) {
-            getMantle().getMantle().set(x, y, z, d.getCustom());
-        } else {
-            getMantle().getMantle().remove(x, y, z, Identifier.class);
+        if (data instanceof IrisCustomData) {
+            getMantle().getMantle().flag(x >> 4, z >> 4, MantleFlag.CUSTOM, true);
         }
     }
 
@@ -611,6 +610,11 @@ public interface Engine extends DataProvider, Fallible, LootProvider, BlockUpdat
 
     int getGenerated();
 
+    @ChunkCoordinates
+    void addGenerated(int x, int z);
+
+    CompletableFuture<Long> getHash32();
+
     default <T> IrisPosition lookForStreamResult(T find, ProceduralStream<T> stream, Function2<T, T, Boolean> matcher, long timeout) {
         AtomicInteger checked = new AtomicInteger();
         AtomicLong time = new AtomicLong(M.ms());

core/src/main/java/com/volmit/iris/engine/framework/placer/WorldObjectPlacer.java

@@ -13,6 +13,7 @@ import com.volmit.iris.engine.object.IrisLootTable;
 import com.volmit.iris.engine.object.TileData;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.data.B;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.math.RNG;
 import lombok.EqualsAndHashCode;
 import lombok.Getter;
@@ -78,7 +79,11 @@ public class WorldObjectPlacer implements IObjectPlacer {
             }
         }
 
-        block.setBlockData(d);
+
+        if (d instanceof IrisCustomData data) {
+            block.setBlockData(data.getBase());
+            Iris.warn("Tried to place custom block at " + x + ", " + y + ", " + z + " which is not supported!");
+        } else block.setBlockData(d);
     }
 
     @Override

core/src/main/java/com/volmit/iris/engine/jigsaw/PlannedStructure.java

@@ -25,7 +25,6 @@ import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.framework.placer.WorldObjectPlacer;
 import com.volmit.iris.engine.object.*;
 import com.volmit.iris.util.collection.KList;
-import com.volmit.iris.util.data.IrisBlockData;
 import com.volmit.iris.util.mantle.Mantle;
 import com.volmit.iris.util.math.Position2;
 import com.volmit.iris.util.math.RNG;
@@ -155,9 +154,6 @@ public class PlannedStructure {
         return v.place(xx, height, zz, placer, options, rng, (b, data) -> {
             e.set(b.getX(), b.getY(), b.getZ(), v.getLoadKey() + "@" + id);
             e.set(b.getX(), b.getY(), b.getZ(), container);
-            if (data instanceof IrisBlockData d) {
-                e.set(b.getX(), b.getY(), b.getZ(), d.getCustom());
-            }
         }, null, getData().getEngine() != null ? getData() : eng.getData()) != -1;
     }
 

core/src/main/java/com/volmit/iris/engine/mantle/EngineMantle.java

@@ -34,6 +34,7 @@ import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.context.ChunkContext;
 import com.volmit.iris.util.context.IrisContext;
 import com.volmit.iris.util.data.B;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.documentation.BlockCoordinates;
 import com.volmit.iris.util.documentation.ChunkCoordinates;
 import com.volmit.iris.util.hunk.Hunk;
@@ -104,7 +105,10 @@ public interface EngineMantle extends IObjectPlacer {
 
     @Override
     default void set(int x, int y, int z, BlockData d) {
-        getMantle().set(x, y, z, d == null ? AIR : d);
+        if (d instanceof IrisCustomData data) {
+            getMantle().set(x, y, z, data.getBase());
+            getMantle().set(x, y, z, data.getCustom());
+        } else getMantle().set(x, y, z, d == null ? AIR : d);
     }
 
     @Override

core/src/main/java/com/volmit/iris/engine/mantle/MantleWriter.java

@@ -29,6 +29,7 @@ import com.volmit.iris.engine.object.IrisPosition;
 import com.volmit.iris.engine.object.TileData;
 import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.collection.KSet;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.function.Function3;
 import com.volmit.iris.util.mantle.Mantle;
 import com.volmit.iris.util.mantle.MantleChunk;
@@ -166,7 +167,10 @@ public class MantleWriter implements IObjectPlacer, AutoCloseable {
 
     @Override
     public void set(int x, int y, int z, BlockData d) {
-        setData(x, y, z, d);
+        if (d instanceof IrisCustomData data) {
+            setData(x, y, z, data.getBase());
+            setData(x, y, z, data.getCustom());
+        } else setData(x, y, z, d);
     }
 
     @Override

core/src/main/java/com/volmit/iris/engine/mantle/components/MantleJigsawComponent.java

@@ -90,8 +90,10 @@ public class MantleJigsawComponent extends IrisMantleComponent {
     private boolean placeStructures(MantleWriter writer, long seed, int x, int z, KList<IrisJigsawStructurePlacement> structures,
             KSet<Position2> cachedRegions, KMap<String, KSet<Position2>> cache, KMap<Position2, Double> distanceCache) {
         IrisJigsawStructurePlacement i = pick(structures, seed, x, z);
-        if (i == null || checkMinDistances(i.collectMinDistances(), x, z, cachedRegions, cache, distanceCache))
-            return false;
+        try {
+            if (i == null || checkMinDistances(i.collectMinDistances(), x, z, cachedRegions, cache, distanceCache))
+                return false;
+        } catch (Throwable ignored) {}
         RNG rng = new RNG(seed);
         IrisPosition position = new IrisPosition((x << 4) + rng.nextInt(15), 0, (z << 4) + rng.nextInt(15));
         IrisJigsawStructure structure = getData().getJigsawStructureLoader().load(i.getStructure());
@@ -159,7 +161,7 @@ public class MantleJigsawComponent extends IrisMantleComponent {
     @ChunkCoordinates
     private IrisJigsawStructurePlacement pick(List<IrisJigsawStructurePlacement> structures, long seed, int x, int z) {
         return IRare.pick(structures.stream()
-                .filter(p -> p.shouldPlace(getDimension().getJigsawStructureDivisor(), jigsaw(), x, z))
+                .filter(p -> p.shouldPlace(getData(), getDimension().getJigsawStructureDivisor(), jigsaw(), x, z))
                 .toList(), new RNG(seed).nextDouble());
     }
 

core/src/main/java/com/volmit/iris/engine/mantle/components/MantleObjectComponent.java

@@ -29,7 +29,6 @@ import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.collection.KSet;
 import com.volmit.iris.util.context.ChunkContext;
 import com.volmit.iris.util.data.B;
-import com.volmit.iris.util.data.IrisBlockData;
 import com.volmit.iris.util.documentation.BlockCoordinates;
 import com.volmit.iris.util.documentation.ChunkCoordinates;
 import com.volmit.iris.util.format.Form;
@@ -116,9 +115,6 @@ public class MantleObjectComponent extends IrisMantleComponent {
                 if (objectPlacement.isDolphinTarget() && objectPlacement.isUnderwater() && B.isStorageChest(data)) {
                     writer.setData(b.getX(), b.getY(), b.getZ(), MatterStructurePOI.BURIED_TREASURE);
                 }
-                if (data instanceof IrisBlockData d) {
-                    writer.setData(b.getX(), b.getY(), b.getZ(), d.getCustom());
-                }
             }, null, getData());
         }
     }

core/src/main/java/com/volmit/iris/engine/mode/ModeOverworld.java

@@ -25,10 +25,7 @@ import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.framework.EngineMode;
 import com.volmit.iris.engine.framework.EngineStage;
 import com.volmit.iris.engine.framework.IrisEngineMode;
-import com.volmit.iris.engine.modifier.IrisCarveModifier;
-import com.volmit.iris.engine.modifier.IrisDepositModifier;
-import com.volmit.iris.engine.modifier.IrisPerfectionModifier;
-import com.volmit.iris.engine.modifier.IrisPostModifier;
+import com.volmit.iris.engine.modifier.*;
 import org.bukkit.block.data.BlockData;
 
 public class ModeOverworld extends IrisEngineMode implements EngineMode {
@@ -41,6 +38,7 @@ public class ModeOverworld extends IrisEngineMode implements EngineMode {
         var post = new IrisPostModifier(getEngine());
         var deposit = new IrisDepositModifier(getEngine());
         var perfection = new IrisPerfectionModifier(getEngine());
+        var custom = new IrisCustomModifier(getEngine());
         EngineStage sBiome = (x, z, k, p, m, c) -> biome.actuate(x, z, p, m, c);
         EngineStage sGenMatter = (x, z, k, p, m, c) -> generateMatter(x >> 4, z >> 4, m, c);
         EngineStage sTerrain = (x, z, k, p, m, c) -> terrain.actuate(x, z, k, m, c);
@@ -50,6 +48,7 @@ public class ModeOverworld extends IrisEngineMode implements EngineMode {
         EngineStage sPost = (x, z, k, p, m, c) -> post.modify(x, z, k, m, c);
         EngineStage sInsertMatter = (x, z, K, p, m, c) -> getMantle().insertMatter(x >> 4, z >> 4, BlockData.class, K, m);
         EngineStage sPerfection = (x, z, k, p, m, c) -> perfection.modify(x, z, k, m, c);
+        EngineStage sCustom = (x, z, k, p, m, c) -> custom.modify(x, z, k, m, c);
 
         registerStage(burst(
                 sGenMatter,
@@ -65,6 +64,6 @@ public class ModeOverworld extends IrisEngineMode implements EngineMode {
                 sDecorant
         ));
         registerStage(sPerfection);
-
+        registerStage(sCustom);
     }
 }

core/src/main/java/com/volmit/iris/engine/modifier/IrisCarveModifier.java

@@ -57,7 +57,7 @@ public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
     public void onModify(int x, int z, Hunk<BlockData> output, boolean multicore, ChunkContext context) {
         PrecisionStopwatch p = PrecisionStopwatch.start();
         Mantle mantle = getEngine().getMantle().getMantle();
-        MantleChunk mc = getEngine().getMantle().getMantle().getChunk(x, z);
+        MantleChunk mc = getEngine().getMantle().getMantle().getChunk(x, z).use();
         KMap<Long, KList<Integer>> positions = new KMap<>();
         KMap<IrisPosition, MatterCavern> walls = new KMap<>();
         Consumer4<Integer, Integer, Integer, MatterCavern> iterator = (xx, yy, zz, c) -> {
@@ -166,6 +166,7 @@ public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
         });
 
         getEngine().getMetrics().getDeposit().put(p.getMilliseconds());
+        mc.release();
     }
 
     private void processZone(Hunk<BlockData> output, MantleChunk mc, Mantle mantle, CaveZone zone, int rx, int rz, int xx, int zz) {
@@ -211,14 +212,6 @@ public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
 
         biome.setInferredType(InferredType.CAVE);
 
-        for (IrisDecorator i : biome.getDecorators()) {
-            if (i.getPartOf().equals(IrisDecorationPart.NONE) && B.isSolid(output.get(rx, zone.getFloor() - 1, rz))) {
-                decorant.getSurfaceDecorator().decorate(rx, rz, xx, xx, xx, zz, zz, zz, output, biome, zone.getFloor() - 1, zone.airThickness());
-            } else if (i.getPartOf().equals(IrisDecorationPart.CEILING) && B.isSolid(output.get(rx, zone.getCeiling() + 1, rz))) {
-                decorant.getCeilingDecorator().decorate(rx, rz, xx, xx, xx, zz, zz, zz, output, biome, zone.getCeiling(), zone.airThickness());
-            }
-        }
-
         KList<BlockData> blocks = biome.generateLayers(getDimension(), xx, zz, rng, 3, zone.floor, getData(), getComplex());
 
         for (int i = 0; i < zone.floor - 1; i++) {
@@ -260,6 +253,14 @@ public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
                 output.set(rx, zone.ceiling + i + 1, rz, b);
             }
         }
+
+        for (IrisDecorator i : biome.getDecorators()) {
+            if (i.getPartOf().equals(IrisDecorationPart.NONE) && B.isSolid(output.get(rx, zone.getFloor() - 1, rz))) {
+                decorant.getSurfaceDecorator().decorate(rx, rz, xx, xx, xx, zz, zz, zz, output, biome, zone.getFloor() - 1, zone.airThickness());
+            } else if (i.getPartOf().equals(IrisDecorationPart.CEILING) && B.isSolid(output.get(rx, zone.getCeiling() + 1, rz))) {
+                decorant.getCeilingDecorator().decorate(rx, rz, xx, xx, xx, zz, zz, zz, output, biome, zone.getCeiling(), zone.airThickness());
+            }
+        }
     }
 
     @Data

core/src/main/java/com/volmit/iris/engine/modifier/IrisCustomModifier.java

@@ -0,0 +1,43 @@
+package com.volmit.iris.engine.modifier;
+import com.volmit.iris.core.link.Identifier;
+import com.volmit.iris.engine.framework.Engine;
+import com.volmit.iris.engine.framework.EngineAssignedModifier;
+import com.volmit.iris.util.context.ChunkContext;
+import com.volmit.iris.util.data.IrisCustomData;
+import com.volmit.iris.util.hunk.Hunk;
+import com.volmit.iris.util.mantle.MantleFlag;
+import com.volmit.iris.util.parallel.BurstExecutor;
+import com.volmit.iris.util.parallel.MultiBurst;
+import org.bukkit.block.data.BlockData;
+public class IrisCustomModifier extends EngineAssignedModifier<BlockData> {
+    public IrisCustomModifier(Engine engine) {
+        super(engine, "Custom");
+    }
+    @Override
+    public void onModify(int x, int z, Hunk<BlockData> output, boolean multicore, ChunkContext context) {
+        var mc = getEngine().getMantle().getMantle().getChunk(x >> 4, z >> 4);
+        if (!mc.isFlagged(MantleFlag.CUSTOM_ACTIVE)) return;
+        mc.use();
+
+        BurstExecutor burst = MultiBurst.burst.burst(output.getHeight());
+        burst.setMulticore(multicore);
+        for (int y = 0; y < output.getHeight(); y++) {
+            int finalY = y;
+            burst.queue(() -> {
+                for (int rX = 0; rX < output.getWidth(); rX++) {
+                    for (int rZ = 0; rZ < output.getDepth(); rZ++) {
+                        BlockData b = output.get(rX, finalY, rZ);
+                        if (!(b instanceof IrisCustomData d)) continue;
+
+                        mc.getOrCreate(finalY >> 4)
+                                .slice(Identifier.class)
+                                .set(rX, finalY & 15, rZ, d.getCustom());
+                        output.set(rX, finalY, rZ, d.getBase());
+                    }
+                }
+            });
+        }
+        burst.complete();
+        mc.release();
+    }
+}

core/src/main/java/com/volmit/iris/engine/object/IrisBiome.java

@@ -200,7 +200,7 @@ public class IrisBiome extends IrisRegistrant implements IRare {
             KMap<String, Integer> l = new KMap<>();
 
             for (IrisBiomeGeneratorLink i : getGenerators()) {
-                l.put(i.getGenerator(), i.getMax(engine));
+                l.put(i.getGenerator(), i.getMax());
 
             }
 
@@ -216,7 +216,7 @@ public class IrisBiome extends IrisRegistrant implements IRare {
             KMap<String, Integer> l = new KMap<>();
 
             for (IrisBiomeGeneratorLink i : getGenerators()) {
-                l.put(i.getGenerator(), i.getMin(engine));
+                l.put(i.getGenerator(), i.getMin());
             }
 
             return l;
@@ -457,7 +457,7 @@ public class IrisBiome extends IrisRegistrant implements IRare {
             int maxHeight = 0;
 
             for (IrisBiomeGeneratorLink i : getGenerators()) {
-                maxHeight += i.getMax(engine);
+                maxHeight += i.getMax();
             }
 
             return maxHeight;
@@ -470,7 +470,7 @@ public class IrisBiome extends IrisRegistrant implements IRare {
             int maxHeight = 0;
 
             for (IrisBiomeGeneratorLink i : getGenerators()) {
-                maxHeight += i.getMax(engine);
+                maxHeight += i.getMax();
             }
 
             int gg = 0;

core/src/main/java/com/volmit/iris/engine/object/IrisBiomeGeneratorLink.java

@@ -18,9 +18,7 @@
 
 package com.volmit.iris.engine.object;
 
-import com.volmit.iris.Iris;
 import com.volmit.iris.engine.data.cache.AtomicCache;
-import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.object.annotations.*;
 import com.volmit.iris.util.data.DataProvider;
 import com.volmit.iris.util.interpolation.IrisInterpolation;
@@ -39,18 +37,16 @@ public class IrisBiomeGeneratorLink {
     @RegistryListResource(IrisGenerator.class)
     @Desc("The generator id")
     private String generator = "default";
-    @DependsOn({ "min", "max" })
+    @DependsOn({"min", "max"})
     @Required
     @MinNumber(-2032) // TODO: WARNING HEIGHT
     @MaxNumber(2032) // TODO: WARNING HEIGHT
     @Desc("The min block value (value + fluidHeight)")
-    @Getter(AccessLevel.NONE)
     private int min = 0;
-    @DependsOn({ "min", "max" })
+    @DependsOn({"min", "max"})
     @Required
     @MinNumber(-2032) // TODO: WARNING HEIGHT
     @MaxNumber(2032) // TODO: WARNING HEIGHT
-    @Getter(AccessLevel.NONE)
     @Desc("The max block value (value + fluidHeight)")
     private int max = 0;
 
@@ -66,70 +62,6 @@ public class IrisBiomeGeneratorLink {
         });
     }
 
-    private int[] getBiomeGeneratorsRaw(Engine engine) {
-        int max = engine.getDimension().getMinHeight();
-        int min = engine.getDimension().getMaxHeight();
-        for (IrisBiome biome : engine.getAllBiomes()) {
-            for (IrisBiomeGeneratorLink i : biome.getGenerators()) {
-                int biomeRawMax = i.getMaxRaw();
-                int biomeRawMin = i.getMinRaw();
-                if (max < biomeRawMax)
-                    max = biomeRawMax;
-                if (min > biomeRawMin)
-                    min = biomeRawMin;
-            }
-        }
-
-        return new int[] { min, max };
-    }
-
-    private int calculateHeight(Engine engine, int option) {
-        int dmx = engine.getDimension().getMaxHeight();
-        int dmn = engine.getDimension().getMinHeight();
-        int[] heights = getBiomeGeneratorsRaw(engine);
-        int gmx = heights[1];
-        int gmn = heights[0];
-
-        int mx = getMaxRaw();
-        int mn = getMinRaw();
-        if (engine.getDimension().isSmartVanillaHeight()) {
-            if (mx > 0)
-                mx = Math.min((int) (((float) mx / (float) gmx) * 300.0f), 300);
-            if (mx < 0)
-                mx = Math.min((int) (((float) mx / (float) gmn) * 300.0f), 56);
-
-            if (mn > 0)
-                mn = Math.min((int) (((float) mn / (float) gmx) * 300.0f), 300);
-            if (mn < 0)
-                mn = Math.min((int) (((float) mn / (float) gmn) * 300.0f), 56);
-        }
-
-        if (option == 1) {
-            return mx;
-        }
-        if (option == 0) {
-            return mn;
-        }
-        Iris.error("Fatal Generator error!");
-        return 0;
-    }
-
-    public int getMax(Engine engine) {
-        return calculateHeight(engine, 1);
-    }
-
-    public int getMin(Engine engine) {
-        return calculateHeight(engine, 0);
-    }
-
-    private int getMaxRaw() {
-        return max;
-    }
-
-    private int getMinRaw() {
-        return min;
-    }
-
     public double getHeight(DataProvider xg, double x, double z, long seed) {
         double g = getCachedGenerator(xg).getHeight(x, z, seed);
         g = g < 0 ? 0 : g;

core/src/main/java/com/volmit/iris/engine/object/IrisContextInjector.java

@@ -0,0 +1,77 @@
+package com.volmit.iris.engine.object;
+
+import com.volmit.iris.core.nms.INMS;
+import com.volmit.iris.core.nms.container.AutoClosing;
+import com.volmit.iris.util.misc.ServerProperties;
+import lombok.Getter;
+import org.bukkit.Bukkit;
+import org.bukkit.configuration.ConfigurationSection;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.world.WorldInitEvent;
+
+import java.util.List;
+
+import static com.volmit.iris.Iris.instance;
+
+public class IrisContextInjector implements Listener {
+    @Getter
+    private static boolean missingDimensionTypes = false;
+    private AutoClosing autoClosing = null;
+    private final int totalWorlds;
+    private int worldCounter = 0;
+
+    public IrisContextInjector() {
+        if (!Bukkit.getWorlds().isEmpty()) {
+            totalWorlds = 0;
+            return;
+        }
+
+        String levelName = ServerProperties.LEVEL_NAME;
+        List<String> irisWorlds = irisWorlds();
+        boolean overworld = irisWorlds.contains(levelName);
+        boolean nether = irisWorlds.contains(levelName + "_nether");
+        boolean end = irisWorlds.contains(levelName + "_end");
+
+        int i = 1;
+        if (Bukkit.getAllowNether()) i++;
+        if (Bukkit.getAllowEnd()) i++;
+
+        if (INMS.get().missingDimensionTypes(overworld, nether, end)) {
+            missingDimensionTypes = true;
+            totalWorlds = 0;
+            return;
+        }
+
+        if (overworld || nether || end) {
+            var pair = INMS.get().injectUncached(overworld, nether, end);
+            i += pair.getA() - 3;
+            autoClosing = pair.getB();
+        }
+
+        totalWorlds = i;
+        instance.registerListener(this);
+    }
+
+    @EventHandler
+    public void on(WorldInitEvent event) {
+        if (++worldCounter < totalWorlds) return;
+        if (autoClosing != null) {
+            autoClosing.close();
+            autoClosing = null;
+        }
+        instance.unregisterListener(this);
+    }
+
+    private List<String> irisWorlds() {
+        var config = YamlConfiguration.loadConfiguration(ServerProperties.BUKKIT_YML);
+        ConfigurationSection section = config.getConfigurationSection("worlds");
+        if (section == null) return List.of();
+
+        return section.getKeys(false)
+                .stream()
+                .filter(k -> section.getString(k + ".generator", "").startsWith("Iris"))
+                .toList();
+    }
+}

core/src/main/java/com/volmit/iris/engine/object/IrisDimension.java

@@ -19,6 +19,8 @@
 package com.volmit.iris.engine.object;
 
 import com.volmit.iris.Iris;
+import com.volmit.iris.core.IrisSettings;
+import com.volmit.iris.core.ServerConfigurator.DimensionHeight;
 import com.volmit.iris.core.loader.IrisData;
 import com.volmit.iris.core.loader.IrisRegistrant;
 import com.volmit.iris.core.nms.INMS;
@@ -26,6 +28,7 @@ import com.volmit.iris.core.nms.datapack.IDataFixer;
 import com.volmit.iris.engine.data.cache.AtomicCache;
 import com.volmit.iris.engine.object.annotations.*;
 import com.volmit.iris.util.collection.KList;
+import com.volmit.iris.util.collection.KSet;
 import com.volmit.iris.util.data.DataProvider;
 import com.volmit.iris.util.io.IO;
 import com.volmit.iris.util.json.JSONObject;
@@ -54,73 +57,6 @@ import java.io.IOException;
 public class IrisDimension extends IrisRegistrant {
     public static final BlockData STONE = Material.STONE.createBlockData();
     public static final BlockData WATER = Material.WATER.createBlockData();
-    private static final String DP_OVERWORLD_DEFAULT = """
-            {
-              "ambient_light": 0.0,
-              "bed_works": true,
-              "coordinate_scale": 1.0,
-              "effects": "minecraft:overworld",
-              "has_ceiling": false,
-              "has_raids": true,
-              "has_skylight": true,
-              "infiniburn": "#minecraft:infiniburn_overworld",
-              "monster_spawn_block_light_limit": 0,
-              "monster_spawn_light_level": {
-                "type": "minecraft:uniform",
-                "value": {
-                  "max_inclusive": 7,
-                  "min_inclusive": 0
-                }
-              },
-              "natural": true,
-              "piglin_safe": false,
-              "respawn_anchor_works": false,
-              "ultrawarm": false
-            }""";
-
-    private static final String DP_NETHER_DEFAULT = """
-            {
-              "ambient_light": 0.1,
-              "bed_works": false,
-              "coordinate_scale": 8.0,
-              "effects": "minecraft:the_nether",
-              "fixed_time": 18000,
-              "has_ceiling": true,
-              "has_raids": false,
-              "has_skylight": false,
-              "infiniburn": "#minecraft:infiniburn_nether",
-              "monster_spawn_block_light_limit": 15,
-              "monster_spawn_light_level": 7,
-              "natural": false,
-              "piglin_safe": true,
-              "respawn_anchor_works": true,
-              "ultrawarm": true
-            }""";
-
-    private static final String DP_END_DEFAULT = """
-            {
-              "ambient_light": 0.0,
-              "bed_works": false,
-              "coordinate_scale": 1.0,
-              "effects": "minecraft:the_end",
-              "fixed_time": 6000,
-              "has_ceiling": false,
-              "has_raids": true,
-              "has_skylight": false,
-              "infiniburn": "#minecraft:infiniburn_end",
-              "monster_spawn_block_light_limit": 0,
-              "monster_spawn_light_level": {
-                "type": "minecraft:uniform",
-                "value": {
-                  "max_inclusive": 7,
-                  "min_inclusive": 0
-                }
-              },
-              "natural": false,
-              "piglin_safe": false,
-              "respawn_anchor_works": false,
-              "ultrawarm": false
-            }""";
     private final transient AtomicCache<Position2> parallaxSize = new AtomicCache<>();
     private final transient AtomicCache<CNG> rockLayerGenerator = new AtomicCache<>();
     private final transient AtomicCache<CNG> fluidLayerGenerator = new AtomicCache<>();
@@ -234,8 +170,6 @@ public class IrisDimension extends IrisRegistrant {
     private IrisRange dimensionHeightEnd = new IrisRange(-64, 320);
     @Desc("Define the min and max Y bounds of this dimension. Please keep in mind that Iris internally generates from 0 to (max - min). \n\nFor example at -64 to 320, Iris is internally generating to 0 to 384, then on outputting chunks, it shifts it down by the min height (64 blocks). The default is -64 to 320. \n\nThe fluid height is placed at (fluid height + min height). So a fluid height of 63 would actually show up in the world at 1.")
     private IrisRange dimensionHeightNether = new IrisRange(-64, 320);
-    @Desc("Enable smart vanilla height")
-    private boolean smartVanillaHeight = false;
     @RegistryListResource(IrisBiome.class)
     @Desc("Keep this either undefined or empty. Setting any biome name into this will force iris to only generate the specified biome. Great for testing.")
     private String focus = "";
@@ -445,61 +379,35 @@ public class IrisDimension extends IrisRegistrant {
         return landBiomeStyle;
     }
 
-    public boolean installDataPack(IDataFixer fixer, DataProvider data, File datapacks, double ultimateMaxHeight, double ultimateMinHeight) {
-        boolean write = false;
-        boolean changed = false;
-
-        IO.delete(new File(datapacks, "iris/data/" + getLoadKey().toLowerCase()));
-
-        for (IrisBiome i : getAllBiomes(data)) {
-            if (i.isCustom()) {
-                write = true;
-
-                for (IrisBiomeCustom j : i.getCustomDerivitives()) {
-                    File output = new File(datapacks, "iris/data/" + getLoadKey().toLowerCase() + "/worldgen/biome/" + j.getId() + ".json");
-
-                    if (!output.exists()) {
-                        changed = true;
-                    }
-
-                    Iris.verbose("    Installing Data Pack Biome: " + output.getPath());
-                    output.getParentFile().mkdirs();
-                    try {
-                        IO.writeAll(output, j.generateJson(fixer));
-                    } catch (IOException e) {
-                        Iris.reportError(e);
-                        e.printStackTrace();
-                    }
-                }
-            }
-        }
-
-        if (!dimensionHeight.equals(new IrisRange(-64, 320)) && this.name.equalsIgnoreCase("overworld")) {
-            Iris.verbose("    Installing Data Pack Dimension Types: \"minecraft:overworld\", \"minecraft:the_nether\", \"minecraft:the_end\"");
-            dimensionHeight.setMax(ultimateMaxHeight);
-            dimensionHeight.setMin(ultimateMinHeight);
-            changed = writeDimensionType(fixer, changed, datapacks);
-        }
-
-        if (write) {
-            File mcm = new File(datapacks, "iris/pack.mcmeta");
-            try {
-                IO.writeAll(mcm, """
-                        {
-                            "pack": {
-                                "description": "Iris Data Pack. This pack contains all installed Iris Packs' resources.",
-                                "pack_format": {}
-                            }
+    public void installBiomes(IDataFixer fixer, DataProvider data, KList<File> folders, KSet<String> biomes) {
+        getAllBiomes(data)
+                .stream()
+                .filter(IrisBiome::isCustom)
+                .map(IrisBiome::getCustomDerivitives)
+                .flatMap(KList::stream)
+                .parallel()
+                .forEach(j -> {
+                    String json = j.generateJson(fixer);
+                    synchronized (biomes) {
+                        if (!biomes.add(j.getId())) {
+                            Iris.verbose("Duplicate Data Pack Biome: " + getLoadKey() + "/" + j.getId());
+                            return;
                         }
-                        """.replace("{}", INMS.get().getDataVersion().getPackFormat() + ""));
-            } catch (IOException e) {
-                Iris.reportError(e);
-                e.printStackTrace();
-            }
-            Iris.verbose("    Installing Data Pack MCMeta: " + mcm.getPath());
-        }
+                    }
 
-        return changed;
+                    for (File datapacks : folders) {
+                        File output = new File(datapacks, "iris/data/" + getLoadKey().toLowerCase() + "/worldgen/biome/" + j.getId() + ".json");
+
+                        Iris.verbose("    Installing Data Pack Biome: " + output.getPath());
+                        output.getParentFile().mkdirs();
+                        try {
+                            IO.writeAll(output, json);
+                        } catch (IOException e) {
+                            Iris.reportError(e);
+                            e.printStackTrace();
+                        }
+                    }
+                });
     }
 
     @Override
@@ -517,66 +425,55 @@ public class IrisDimension extends IrisRegistrant {
 
     }
 
-    public boolean writeDimensionType(IDataFixer fixer, boolean changed, File datapacks) {
-        File dimTypeOverworld = new File(datapacks, "iris/data/minecraft/dimension_type/overworld.json");
-        if (!dimTypeOverworld.exists())
-            changed = true;
-        dimTypeOverworld.getParentFile().mkdirs();
+    public static void writeShared(KList<File> folders, DimensionHeight height) {
+        Iris.verbose("    Installing Data Pack Dimension Types: \"iris:overworld\", \"iris:the_nether\", \"iris:the_end\"");
+        for (File datapacks : folders) {
+            write(datapacks, "overworld", height.overworldType());
+            write(datapacks, "the_nether", height.netherType());
+            write(datapacks, "the_end", height.endType());
+        }
+
+        String raw = """
+                        {
+                            "pack": {
+                                "description": "Iris Data Pack. This pack contains all installed Iris Packs' resources.",
+                                "pack_format": {}
+                            }
+                        }
+                        """.replace("{}", INMS.get().getDataVersion().getPackFormat() + "");
+
+        for (File datapacks : folders) {
+            File mcm = new File(datapacks, "iris/pack.mcmeta");
+            try {
+                IO.writeAll(mcm, raw);
+            } catch (IOException e) {
+                Iris.reportError(e);
+                e.printStackTrace();
+            }
+            Iris.verbose("    Installing Data Pack MCMeta: " + mcm.getPath());
+        }
+    }
+
+    private static void write(File datapacks, String type, String json) {
+        File dimType = new File(datapacks, "iris/data/iris/dimension_type/" + type + ".json");
+        File dimTypeVanilla = new File(datapacks, "iris/data/minecraft/dimension_type/" + type + ".json");
+
+        dimType.getParentFile().mkdirs();
         try {
-            IO.writeAll(dimTypeOverworld, generateDatapackJsonOverworld(fixer));
+            IO.writeAll(dimType, json);
         } catch (IOException e) {
             Iris.reportError(e);
             e.printStackTrace();
         }
 
-
-        File dimTypeNether = new File(datapacks, "iris/data/minecraft/dimension_type/the_nether.json");
-        if (!dimTypeNether.exists())
-            changed = true;
-        dimTypeNether.getParentFile().mkdirs();
-        try {
-            IO.writeAll(dimTypeNether, generateDatapackJsonNether(fixer));
-        } catch (IOException e) {
-            Iris.reportError(e);
-            e.printStackTrace();
+        if (IrisSettings.get().getGeneral().adjustVanillaHeight || dimTypeVanilla.exists()) {
+            dimTypeVanilla.getParentFile().mkdirs();
+            try {
+                IO.writeAll(dimTypeVanilla, json);
+            } catch (IOException e) {
+                Iris.reportError(e);
+                e.printStackTrace();
+            }
         }
-
-
-        File dimTypeEnd = new File(datapacks, "iris/data/minecraft/dimension_type/the_end.json");
-        if (!dimTypeEnd.exists())
-            changed = true;
-        dimTypeEnd.getParentFile().mkdirs();
-        try {
-            IO.writeAll(dimTypeEnd, generateDatapackJsonEnd(fixer));
-        } catch (IOException e) {
-            Iris.reportError(e);
-            e.printStackTrace();
-        }
-
-        return changed;
-    }
-
-    private String generateDatapackJsonOverworld(IDataFixer fixer) {
-        JSONObject obj = new JSONObject(DP_OVERWORLD_DEFAULT);
-        obj.put("min_y", dimensionHeight.getMin());
-        obj.put("height", dimensionHeight.getMax() - dimensionHeight.getMin());
-        obj.put("logical_height", logicalHeight);
-        return fixer.fixDimension(obj).toString(4);
-    }
-
-    private String generateDatapackJsonNether(IDataFixer fixer) {
-        JSONObject obj = new JSONObject(DP_NETHER_DEFAULT);
-        obj.put("min_y", dimensionHeightNether.getMin());
-        obj.put("height", dimensionHeightNether.getMax() - dimensionHeightNether.getMin());
-        obj.put("logical_height", logicalHeightNether);
-        return fixer.fixDimension(obj).toString(4);
-    }
-
-    private String generateDatapackJsonEnd(IDataFixer fixer) {
-        JSONObject obj = new JSONObject(DP_END_DEFAULT);
-        obj.put("min_y", dimensionHeightEnd.getMin());
-        obj.put("height", dimensionHeightEnd.getMax() - dimensionHeightEnd.getMin());
-        obj.put("logical_height", logicalHeightEnd);
-        return fixer.fixDimension(obj).toString(4);
     }
 }

core/src/main/java/com/volmit/iris/engine/object/IrisEngineChunkData.java

@@ -1,43 +0,0 @@
-/*
- * Iris is a World Generator for Minecraft Bukkit Servers
- * Copyright (c) 2022 Arcane Arts (Volmit Software)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.volmit.iris.engine.object;
-
-import com.volmit.iris.engine.framework.Engine;
-import com.volmit.iris.util.collection.KList;
-import lombok.Data;
-
-@Data
-public class IrisEngineChunkData {
-    private long chunk;
-    private KList<IrisEngineSpawnerCooldown> cooldowns = new KList<>();
-
-    public void cleanup(Engine engine) {
-        for (IrisEngineSpawnerCooldown i : getCooldowns().copy()) {
-            IrisSpawner sp = engine.getData().getSpawnerLoader().load(i.getSpawner());
-
-            if (sp == null || i.canSpawn(sp.getMaximumRate())) {
-                getCooldowns().remove(i);
-            }
-        }
-    }
-
-    public boolean isEmpty() {
-        return cooldowns.isEmpty();
-    }
-}

core/src/main/java/com/volmit/iris/engine/object/IrisEngineData.java

@@ -20,51 +20,31 @@ package com.volmit.iris.engine.object;
 
 import com.volmit.iris.engine.data.cache.Cache;
 import com.volmit.iris.engine.framework.Engine;
-import com.volmit.iris.util.collection.KList;
+import com.volmit.iris.util.collection.KMap;
 import lombok.Data;
+import lombok.EqualsAndHashCode;
 
 @Data
-public class IrisEngineData {
+@EqualsAndHashCode(callSuper = true)
+public class IrisEngineData extends IrisSpawnerCooldowns {
     private IrisEngineStatistics statistics = new IrisEngineStatistics();
-    private KList<IrisEngineSpawnerCooldown> spawnerCooldowns = new KList<>();
-    private KList<IrisEngineChunkData> chunks = new KList<>();
+    private KMap<Long, IrisSpawnerCooldowns> chunks = new KMap<>();
     private Long seed = null;
 
     public void removeChunk(int x, int z) {
-        long k = Cache.key(x, z);
-        chunks.removeWhere((i) -> i.getChunk() == k);
+        chunks.remove(Cache.key(x, z));
     }
 
-    public IrisEngineChunkData getChunk(int x, int z) {
-        long k = Cache.key(x, z);
-
-        for (IrisEngineChunkData i : chunks) {
-            if (i.getChunk() == k) {
-                return i;
-            }
-        }
-
-        IrisEngineChunkData c = new IrisEngineChunkData();
-        c.setChunk(k);
-        chunks.add(c);
-        return c;
+    public IrisSpawnerCooldowns getChunk(int x, int z) {
+        return chunks.computeIfAbsent(Cache.key(x, z), k -> new IrisSpawnerCooldowns());
     }
 
     public void cleanup(Engine engine) {
-        for (IrisEngineSpawnerCooldown i : getSpawnerCooldowns().copy()) {
-            IrisSpawner sp = engine.getData().getSpawnerLoader().load(i.getSpawner());
+        super.cleanup(engine);
 
-            if (sp == null || i.canSpawn(sp.getMaximumRate())) {
-                getSpawnerCooldowns().remove(i);
-            }
-        }
-
-        for (IrisEngineChunkData i : chunks.copy()) {
-            i.cleanup(engine);
-
-            if (i.isEmpty()) {
-                getChunks().remove(i);
-            }
-        }
+        chunks.values().removeIf(chunk -> {
+            chunk.cleanup(engine);
+            return chunk.isEmpty();
+        });
     }
 }

core/src/main/java/com/volmit/iris/engine/object/IrisEntity.java

@@ -29,7 +29,6 @@ import com.volmit.iris.util.format.C;
 import com.volmit.iris.util.json.JSONObject;
 import com.volmit.iris.util.math.M;
 import com.volmit.iris.util.math.RNG;
-import com.volmit.iris.util.misc.E;
 import com.volmit.iris.util.plugin.Chunks;
 import com.volmit.iris.util.plugin.VolmitSender;
 import com.volmit.iris.util.scheduling.J;
@@ -57,6 +56,8 @@ import java.util.concurrent.ExecutionException;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicReference;
 
+import static com.volmit.iris.util.data.registry.Particles.ITEM;
+
 @SuppressWarnings("ALL")
 @Accessors(chain = true)
 @NoArgsConstructor
@@ -66,7 +67,6 @@ import java.util.concurrent.atomic.AtomicReference;
 @Data
 @EqualsAndHashCode(callSuper = false)
 public class IrisEntity extends IrisRegistrant {
-    private static final Particle ITEM = E.getOrDefault(Particle.class, "ITEM_CRACK", "ITEM");
     @Required
     @Desc("The type of entity to spawn. To spawn a mythic mob, set this type to unknown and define mythic type.")
     private EntityType type = EntityType.UNKNOWN;

core/src/main/java/com/volmit/iris/engine/object/IrisExpression.java

@@ -24,6 +24,7 @@ import com.dfsek.paralithic.eval.parser.Scope;
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.loader.IrisRegistrant;
 import com.volmit.iris.engine.data.cache.AtomicCache;
+import com.volmit.iris.engine.object.IrisExpressionFunction.FunctionContext;
 import com.volmit.iris.engine.object.annotations.ArrayType;
 import com.volmit.iris.engine.object.annotations.Desc;
 import com.volmit.iris.engine.object.annotations.Required;
@@ -46,12 +47,14 @@ import lombok.experimental.Accessors;
 @Data
 @EqualsAndHashCode(callSuper = false)
 public class IrisExpression extends IrisRegistrant {
-    private static final Parser parser = new Parser();
-
     @ArrayType(type = IrisExpressionLoad.class, min = 1)
     @Desc("Variables to use in this expression")
     private KList<IrisExpressionLoad> variables = new KList<>();
 
+    @ArrayType(type = IrisExpressionFunction.class, min = 1)
+    @Desc("Functions to use in this expression")
+    private KList<IrisExpressionFunction> functions = new KList<>();
+
     @Required
     @Desc("The expression. Inherited variables are x, y and z. Avoid using those variable names.")
     private String expression;
@@ -62,6 +65,7 @@ public class IrisExpression extends IrisRegistrant {
     private Expression expression() {
         return expressionCache.aquire(() -> {
             Scope scope = new Scope(); // Create variable scope. This scope can hold both constants and invocation variables.
+            Parser parser = new Parser();
 
             try {
                 for (IrisExpressionLoad i : variables) {
@@ -76,6 +80,12 @@ public class IrisExpression extends IrisRegistrant {
                 Iris.error("Script Variable load error in " + getLoadFile().getPath());
             }
 
+            for (IrisExpressionFunction f : functions) {
+                if (!f.isValid()) continue;
+                f.setData(getLoader());
+                parser.registerFunction(f.getName(), f);
+            }
+
             try {
                 return parser.parse(getExpression(), scope);
             } catch (Throwable e) {
@@ -103,7 +113,7 @@ public class IrisExpression extends IrisRegistrant {
         g[m++] = z;
         g[m] = -1;
 
-        return expression().evaluate(g);
+        return expression().evaluate(new FunctionContext(rng), g);
     }
 
     public double evaluate(RNG rng, double x, double y, double z) {
@@ -117,7 +127,7 @@ public class IrisExpression extends IrisRegistrant {
         g[m++] = y;
         g[m] = z;
 
-        return expression().evaluate(g);
+        return expression().evaluate(new FunctionContext(rng), g);
     }
 
     @Override

core/src/main/java/com/volmit/iris/engine/object/IrisExpressionFunction.java

@@ -0,0 +1,101 @@
+package com.volmit.iris.engine.object;
+
+import com.dfsek.paralithic.functions.dynamic.Context;
+import com.dfsek.paralithic.functions.dynamic.DynamicFunction;
+import com.dfsek.paralithic.node.Statefulness;
+import com.volmit.iris.core.loader.IrisData;
+import com.volmit.iris.engine.object.annotations.Desc;
+import com.volmit.iris.engine.object.annotations.MinNumber;
+import com.volmit.iris.engine.object.annotations.Required;
+import com.volmit.iris.engine.object.annotations.Snippet;
+import com.volmit.iris.util.collection.KMap;
+import com.volmit.iris.util.math.RNG;
+import lombok.*;
+import lombok.experimental.Accessors;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+@Snippet("expression-function")
+@Accessors(chain = true)
+@NoArgsConstructor
+@AllArgsConstructor
+@Desc("Represents a function to use in your expression. Do not set the name to x, y, or z, also don't duplicate names.")
+@Data
+@EqualsAndHashCode(callSuper = false)
+public class IrisExpressionFunction implements DynamicFunction {
+    @Required
+    @Desc("The function to assign this value to. Do not set the name to x, y, or z")
+    private String name;
+
+    @Desc("If defined, this variable will use a generator style as it's value")
+    private IrisGeneratorStyle styleValue = null;
+
+    @Desc("If defined, iris will use an internal stream from the engine as it's value")
+    private IrisEngineStreamType engineStreamValue = null;
+
+    @MinNumber(2)
+    @Desc("Number of arguments for the function")
+    private int args = 2;
+
+    @Getter(AccessLevel.NONE)
+    @Setter(AccessLevel.NONE)
+    private transient final KMap<FunctionContext, Provider> cache = new KMap<>();
+    private transient IrisData data;
+
+    public boolean isValid() {
+        return styleValue != null || engineStreamValue != null;
+    }
+
+    @Override
+    public int getArgNumber() {
+        if (engineStreamValue != null) return 2;
+        return Math.max(args, 2);
+    }
+
+    @NotNull
+    @Override
+    public Statefulness statefulness() {
+        return Statefulness.STATEFUL;
+    }
+
+    @Override
+    public double eval(double... doubles) {
+        return 0;
+    }
+
+    @Override
+    public double eval(@Nullable Context raw, double... args) {
+        return cache.computeIfAbsent((FunctionContext) raw, context -> {
+            assert context != null;
+            if (engineStreamValue != null) {
+                var stream = engineStreamValue.get(data.getEngine());
+                return d -> stream.get(d[0], d[1]);
+            }
+
+            if (styleValue != null) {
+                return styleValue.createNoCache(context.rng, data)::noise;
+            }
+
+            return d -> Double.NaN;
+        }).eval(args);
+    }
+
+    public record FunctionContext(@NonNull RNG rng) implements Context {
+        @Override
+        public boolean equals(Object o) {
+            if (o == null || getClass() != o.getClass()) return false;
+            FunctionContext that = (FunctionContext) o;
+            return rng.getSeed() == that.rng.getSeed();
+        }
+
+        @Override
+        public int hashCode() {
+            return Long.hashCode(rng.getSeed());
+        }
+    }
+
+    @FunctionalInterface
+    private interface Provider {
+        double eval(double... args);
+    }
+}

core/src/main/java/com/volmit/iris/engine/object/IrisExpressionLoad.java

@@ -23,12 +23,11 @@ import com.volmit.iris.engine.data.cache.AtomicCache;
 import com.volmit.iris.engine.object.annotations.Desc;
 import com.volmit.iris.engine.object.annotations.Required;
 import com.volmit.iris.engine.object.annotations.Snippet;
+import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.math.RNG;
+import com.volmit.iris.util.noise.CNG;
 import com.volmit.iris.util.stream.ProceduralStream;
-import lombok.AllArgsConstructor;
-import lombok.Data;
-import lombok.EqualsAndHashCode;
-import lombok.NoArgsConstructor;
+import lombok.*;
 import lombok.experimental.Accessors;
 
 @Snippet("expression-load")
@@ -57,6 +56,9 @@ public class IrisExpressionLoad {
 
     private transient AtomicCache<ProceduralStream<Double>> streamCache = new AtomicCache<>();
     private transient AtomicCache<Double> valueCache = new AtomicCache<>();
+    @Getter(AccessLevel.NONE)
+    @Setter(AccessLevel.NONE)
+    private transient final KMap<Long, CNG> styleCache = new KMap<>();
 
     public double getValue(RNG rng, IrisData data, double x, double z) {
         if (engineValue != null) {
@@ -68,7 +70,8 @@ public class IrisExpressionLoad {
         }
 
         if (styleValue != null) {
-            return styleValue.create(rng, data).noise(x, z);
+            return styleCache.computeIfAbsent(rng.getSeed(), k -> styleValue.createNoCache(new RNG(k), data))
+                    .noise(x, z);
         }
 
         return staticValue;
@@ -84,7 +87,8 @@ public class IrisExpressionLoad {
         }
 
         if (styleValue != null) {
-            return styleValue.create(rng, data).noise(x, y, z);
+            return styleCache.computeIfAbsent(rng.getSeed(), k -> styleValue.createNoCache(new RNG(k), data))
+                    .noise(x, y, z);
         }
 
         return staticValue;

core/src/main/java/com/volmit/iris/engine/object/IrisHeadless.java

@@ -0,0 +1,325 @@
+/*
+ *  Iris is a World Generator for Minecraft Bukkit Servers
+ *  Copyright (c) 2024 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.volmit.iris.engine.object;
+
+import com.volmit.iris.Iris;
+import com.volmit.iris.core.nms.INMS;
+import com.volmit.iris.core.nms.headless.IRegion;
+import com.volmit.iris.core.nms.headless.IRegionStorage;
+import com.volmit.iris.core.nms.headless.SerializableChunk;
+import com.volmit.iris.core.pregenerator.PregenListener;
+import com.volmit.iris.engine.data.cache.Cache;
+import com.volmit.iris.engine.framework.Engine;
+import com.volmit.iris.engine.framework.EngineStage;
+import com.volmit.iris.engine.framework.WrongEngineBroException;
+import com.volmit.iris.util.collection.KMap;
+import com.volmit.iris.util.context.ChunkContext;
+import com.volmit.iris.util.context.IrisContext;
+import com.volmit.iris.util.documentation.BlockCoordinates;
+import com.volmit.iris.util.documentation.RegionCoordinates;
+import com.volmit.iris.util.hunk.Hunk;
+import com.volmit.iris.util.hunk.view.BiomeGridHunkHolder;
+import com.volmit.iris.util.hunk.view.SyncChunkDataHunkHolder;
+import com.volmit.iris.util.mantle.MantleFlag;
+import com.volmit.iris.util.math.M;
+import com.volmit.iris.util.math.Position2;
+import com.volmit.iris.util.parallel.MultiBurst;
+import com.volmit.iris.util.scheduling.J;
+import com.volmit.iris.util.scheduling.Looper;
+import com.volmit.iris.util.scheduling.PrecisionStopwatch;
+import org.bukkit.Material;
+import org.bukkit.block.data.BlockData;
+
+import java.io.IOException;
+import java.util.concurrent.*;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.concurrent.atomic.AtomicReferenceArray;
+import java.util.function.Consumer;
+
+public class IrisHeadless {
+    private final long KEEP_ALIVE = TimeUnit.SECONDS.toMillis(10L);
+    private final Engine engine;
+    private final IRegionStorage storage;
+    private final ExecutorService executor = Executors.newCachedThreadPool();
+    private final KMap<Long, Region> regions = new KMap<>();
+    private final AtomicInteger loadedChunks = new AtomicInteger();
+    private transient CompletingThread regionThread;
+    private transient boolean closed = false;
+
+    public IrisHeadless(Engine engine) {
+        this.engine = engine;
+        this.storage = INMS.get().createRegionStorage(engine);
+        if (storage == null) throw new IllegalStateException("Failed to create region storage!");
+        engine.getWorld().headless(this);
+        startRegionCleaner();
+    }
+
+    private void startRegionCleaner() {
+        var cleaner = new Looper() {
+            @Override
+            protected long loop() {
+                if (closed) return -1;
+                long time = M.ms() - KEEP_ALIVE;
+                regions.values()
+                        .stream()
+                        .filter(r -> r.lastEntry < time)
+                        .forEach(Region::submit);
+                return closed ? -1 : 1000;
+            }
+        };
+        cleaner.setName("Iris Region Cleaner - " + engine.getWorld().name());
+        cleaner.setPriority(Thread.MIN_PRIORITY);
+        cleaner.start();
+    }
+
+    public int getLoadedChunks() {
+        return loadedChunks.get();
+    }
+
+    /**
+     * Checks if the mca plate is fully generated or not.
+     *
+     * @param x coord of the chunk
+     * @param z coord of the chunk
+     * @return true if the chunk exists in .mca
+     */
+    public boolean exists(int x, int z) {
+        if (closed) return false;
+        if (engine.getWorld().hasRealWorld() && engine.getWorld().realWorld().isChunkLoaded(x, z))
+            return true;
+        return storage.exists(x, z);
+    }
+
+    public synchronized CompletableFuture<Void> generateRegion(MultiBurst burst, int x, int z, int maxConcurrent, PregenListener listener) {
+        if (closed) return CompletableFuture.completedFuture(null);
+        if (regionThread != null && !regionThread.future.isDone())
+            throw new IllegalStateException("Region generation already in progress");
+
+        regionThread = new CompletingThread(() -> {
+            boolean listening = listener != null;
+            Semaphore semaphore = new Semaphore(maxConcurrent);
+            CountDownLatch latch = new CountDownLatch(1024);
+
+            iterateRegion(x, z, pos -> {
+                try {
+                    semaphore.acquire();
+                } catch (InterruptedException e) {
+                    semaphore.release();
+                    return;
+                }
+
+                burst.complete(() -> {
+                    try {
+                        if (listening) listener.onChunkGenerating(pos.getX(), pos.getZ());
+                        generateChunk(pos.getX(), pos.getZ());
+                        if (listening) listener.onChunkGenerated(pos.getX(), pos.getZ());
+                    } finally {
+                        semaphore.release();
+                        latch.countDown();
+                    }
+                });
+            });
+            try {
+                latch.await();
+            } catch (InterruptedException ignored) {}
+            if (listening) listener.onRegionGenerated(x, z);
+        }, "Region Generator - " + x + "," + z, Thread.MAX_PRIORITY);
+
+        return regionThread.future;
+    }
+
+    @RegionCoordinates
+    private static void iterateRegion(int x, int z, Consumer<Position2> chunkPos) {
+        int cX = x << 5;
+        int cZ = z << 5;
+        for (int xx = 0; xx < 32; xx++) {
+            for (int zz = 0; zz < 32; zz++) {
+                chunkPos.accept(new Position2(cX + xx, cZ + zz));
+            }
+        }
+    }
+
+    public void generateChunk(int x, int z) {
+        if (closed || exists(x, z)) return;
+        try {
+            var chunk = storage.createChunk(x, z);
+            loadedChunks.incrementAndGet();
+
+            SyncChunkDataHunkHolder blocks = new SyncChunkDataHunkHolder(chunk);
+            BiomeGridHunkHolder biomes = new BiomeGridHunkHolder(chunk, chunk.getMinHeight(), chunk.getMaxHeight());
+            ChunkContext ctx = generate(engine, x << 4, z << 4, blocks, biomes);
+            blocks.apply();
+            biomes.apply();
+
+            storage.fillBiomes(chunk, ctx);
+            chunk.mark();
+
+            long key = Cache.key(x >> 5, z >> 5);
+            regions.computeIfAbsent(key, Region::new)
+                    .add(chunk);
+        } catch (Throwable e) {
+            loadedChunks.decrementAndGet();
+            Iris.error("Failed to generate " + x + ", " + z);
+            e.printStackTrace();
+        }
+    }
+
+    @BlockCoordinates
+    private ChunkContext generate(Engine engine, int x, int z, Hunk<BlockData> vblocks, Hunk<org.bukkit.block.Biome> vbiomes) throws WrongEngineBroException {
+        if (engine.isClosed()) {
+            throw new WrongEngineBroException();
+        }
+
+        engine.getContext().touch();
+        engine.getEngineData().getStatistics().generatedChunk();
+        ChunkContext ctx = null;
+        try {
+            PrecisionStopwatch p = PrecisionStopwatch.start();
+            Hunk<BlockData> blocks = vblocks.listen((xx, y, zz, t) -> engine.catchBlockUpdates(x + xx, y + engine.getMinHeight(), z + zz, t));
+
+            var dimension = engine.getDimension();
+            if (dimension.isDebugChunkCrossSections() && ((x >> 4) % dimension.getDebugCrossSectionsMod() == 0 || (z >> 4) % dimension.getDebugCrossSectionsMod() == 0)) {
+                for (int i = 0; i < 16; i++) {
+                    for (int j = 0; j < 16; j++) {
+                        blocks.set(i, 0, j, Material.CRYING_OBSIDIAN.createBlockData());
+                    }
+                }
+            } else {
+                ctx = new ChunkContext(x, z, engine.getComplex());
+                IrisContext.getOr(engine).setChunkContext(ctx);
+
+                for (EngineStage i : engine.getMode().getStages()) {
+                    i.generate(x, z, blocks, vbiomes, false, ctx);
+                }
+            }
+
+            engine.getMantle().getMantle().flag(x >> 4, z >> 4, MantleFlag.REAL, true);
+            engine.getMetrics().getTotal().put(p.getMilliseconds());
+            engine.addGenerated(x,z);
+        } catch (Throwable e) {
+            Iris.reportError(e);
+            engine.fail("Failed to generate " + x + ", " + z, e);
+        }
+        return ctx;
+    }
+
+    public void close() throws IOException {
+        if (closed) return;
+        try {
+            if (regionThread != null) {
+                regionThread.future.join();
+                regionThread = null;
+            }
+
+            regions.v().forEach(Region::submit);
+            Iris.info("Waiting for " + loadedChunks.get() + " chunks to unload...");
+            while (loadedChunks.get() > 0)
+                J.sleep(1);
+            Iris.info("All chunks unloaded");
+            executor.shutdown();
+            storage.close();
+            engine.getWorld().headless(null);
+        } finally {
+            closed = true;
+        }
+    }
+
+    private class Region implements Runnable {
+        private final int x, z;
+        private final long key;
+        private final AtomicReferenceArray<SerializableChunk> chunks = new AtomicReferenceArray<>(1024);
+        private final AtomicReference<Future<?>> full = new AtomicReference<>();
+        private transient int size;
+        private transient long lastEntry = M.ms();
+
+        public Region(long key) {
+            this.x = Cache.keyX(key);
+            this.z = Cache.keyZ(key);
+            this.key = key;
+        }
+
+        @Override
+        public void run() {
+            try (IRegion region = storage.getRegion(x, z, false)) {
+                assert region != null;
+
+                for (int i = 0; i < 1024; i++) {
+                    SerializableChunk chunk = chunks.get(i);
+                    if (chunk == null)
+                        continue;
+
+                    try {
+                        region.write(chunk);
+                    } catch (Throwable e) {
+                        Iris.error("Failed to save chunk " + chunk.getPos());
+                        e.printStackTrace();
+                    }
+                    loadedChunks.decrementAndGet();
+                }
+            } catch (Throwable e) {
+                Iris.error("Failed to load region file " + x + ", " + z);
+                e.printStackTrace();
+                loadedChunks.addAndGet(-size);
+            }
+        }
+
+        public synchronized void add(SerializableChunk chunk) {
+            lastEntry = M.ms();
+            if (chunks.getAndSet(index(chunk.getPos()), chunk) != null)
+                throw new IllegalStateException("Chunk " + chunk.getPos() + " already exists");
+            if (++size < 1024)
+                return;
+            submit();
+        }
+
+        public void submit() {
+            regions.remove(key);
+            full.getAndUpdate(future -> {
+                if (future != null) return future;
+                return executor.submit(this);
+            });
+        }
+
+        private int index(Position2 chunk) {
+            int x = chunk.getX() & 31;
+            int z = chunk.getZ() & 31;
+            return z * 32 + x;
+        }
+    }
+
+    private static class CompletingThread extends Thread {
+        private final CompletableFuture<Void> future = new CompletableFuture<>();
+
+        private CompletingThread(Runnable task, String name, int priority) {
+            super(task, name);
+            setPriority(priority);
+            start();
+        }
+
+        @Override
+        public void run() {
+            try {
+                super.run();
+            } finally {
+                future.complete(null);
+            }
+        }
+    }
+}

core/src/main/java/com/volmit/iris/engine/object/IrisJigsawStructure.java

@@ -139,6 +139,14 @@ public class IrisJigsawStructure extends IrisRegistrant {
                     loadPiece(i, pools, pieces);
                 }
 
+                if (pieces.isEmpty()) {
+                    int max = 0;
+                    for (String i : getPieces()) {
+                        max = Math.max(max, getLoader().getJigsawPieceLoader().load(i).getMax2dDimension());
+                    }
+                    return max;
+                }
+
                 int avg = 0;
 
                 for (String i : pieces) {

core/src/main/java/com/volmit/iris/engine/object/IrisJigsawStructurePlacement.java

@@ -19,13 +19,8 @@
 package com.volmit.iris.engine.object;
 
 import com.volmit.iris.Iris;
-import com.volmit.iris.engine.object.annotations.ArrayType;
-import com.volmit.iris.engine.object.annotations.Desc;
-import com.volmit.iris.engine.object.annotations.MaxNumber;
-import com.volmit.iris.engine.object.annotations.MinNumber;
-import com.volmit.iris.engine.object.annotations.RegistryListResource;
-import com.volmit.iris.engine.object.annotations.Required;
-import com.volmit.iris.engine.object.annotations.Snippet;
+import com.volmit.iris.core.loader.IrisData;
+import com.volmit.iris.engine.object.annotations.*;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.documentation.ChunkCoordinates;
@@ -54,6 +49,7 @@ public class IrisJigsawStructurePlacement implements IRare {
     private int rarity = 100;
 
     @Required
+    @DependsOn({"spacing", "separation"})
     @Desc("The salt to use when generating the structure (to differentiate structures)")
     @MinNumber(Long.MIN_VALUE)
     @MaxNumber(Long.MAX_VALUE)
@@ -61,16 +57,26 @@ public class IrisJigsawStructurePlacement implements IRare {
 
     @Required
     @MinNumber(0)
+    @DependsOn({"salt", "separation"})
     @Desc("Average distance in chunks between two neighboring generation attempts")
     private int spacing = -1;
 
     @Required
     @MinNumber(0)
+    @DependsOn({"salt", "spacing"})
     @Desc("Minimum distance in chunks between two neighboring generation attempts\nThe maximum distance of two neighboring generation attempts is 2*spacing - separation")
     private int separation = -1;
 
     @Desc("The method used to spread the structure")
-    private SpreadType spreadType = SpreadType.TRIANGULAR;
+    private SpreadType spreadType = SpreadType.LINEAR;
+
+    @DependsOn({"spreadType"})
+    @Desc("The noise style to use when spreadType is set to 'NOISE'\nThis ignores the spacing and separation parameters")
+    private IrisGeneratorStyle style = new IrisGeneratorStyle();
+
+    @DependsOn({"spreadType", "style"})
+    @Desc("Threshold for noise style")
+    private double threshold = 0.5;
 
     @ArrayType(type = IrisJigsawMinDistance.class)
     @Desc("List of minimum distances to check for")
@@ -89,20 +95,29 @@ public class IrisJigsawStructurePlacement implements IRare {
     }
 
     private void calculateMissing(double divisor, long seed) {
-        seed = seed + hashCode();
+        if (salt != 0 && separation > 0 && spacing > 0)
+            return;
+        seed *= (long) structure.hashCode() * rarity;
         if (salt == 0) {
-            salt = new RNG(seed).nextLong(Integer.MIN_VALUE, Integer.MAX_VALUE);
+            salt = new RNG(seed).l(Integer.MIN_VALUE, Integer.MAX_VALUE);
         }
 
         if (separation == -1 || spacing == -1) {
             separation = (int) Math.round(rarity / divisor);
-            spacing = new RNG(seed).nextInt(separation, separation * 2);
+            spacing = new RNG(seed).i(separation, separation * 2);
         }
     }
 
     @ChunkCoordinates
-    public boolean shouldPlace(double divisor, long seed, int x, int z) {
+    public boolean shouldPlace(IrisData data, double divisor, long seed, int x, int z) {
         calculateMissing(divisor, seed);
+        if (spreadType != SpreadType.NOISE)
+            return shouldPlaceSpread(seed, x, z);
+
+        return style.create(new RNG(seed + salt), data).noise(x, z) > threshold;
+    }
+
+    private boolean shouldPlaceSpread(long seed, int x, int z) {
         if (separation > spacing) {
             separation = spacing;
             Iris.warn("JigsawStructurePlacement: separation must be less than or equal to spacing");
@@ -123,7 +138,9 @@ public class IrisJigsawStructurePlacement implements IRare {
         @Desc("Linear spread")
         LINEAR(RNG::i),
         @Desc("Triangular spread")
-        TRIANGULAR((rng, bound) -> (rng.i(bound) + rng.i(bound)) / 2);
+        TRIANGULAR((rng, bound) -> (rng.i(bound) + rng.i(bound)) / 2),
+        @Desc("Noise based spread\nThis ignores the spacing and separation parameters")
+        NOISE((rng, bound) -> 0);
         private final SpreadMethod method;
 
         SpreadType(SpreadMethod method) {

core/src/main/java/com/volmit/iris/engine/object/IrisObject.java

@@ -29,7 +29,7 @@ import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.context.IrisContext;
 import com.volmit.iris.util.data.B;
-import com.volmit.iris.util.data.IrisBlockData;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.format.Form;
 import com.volmit.iris.util.interpolation.IrisInterpolation;
 import com.volmit.iris.util.json.JSONObject;
@@ -53,8 +53,6 @@ import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockFace;
-import org.bukkit.block.BlockState;
-import org.bukkit.block.TileState;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.block.data.MultipleFacing;
 import org.bukkit.block.data.Waterlogged;
@@ -943,7 +941,7 @@ public class IrisObject extends IrisRegistrant {
                             if (j.isExact() ? k.matches(data) : k.getMaterial().equals(data.getMaterial())) {
                                 BlockData newData = j.getReplace(rng, i.getX() + x, i.getY() + y, i.getZ() + z, rdata).clone();
 
-                                if (newData.getMaterial() == data.getMaterial() && !(newData instanceof IrisBlockData || data instanceof IrisBlockData))
+                                if (newData.getMaterial() == data.getMaterial() && !(newData instanceof IrisCustomData || data instanceof IrisCustomData))
                                     data = data.merge(newData);
                                 else
                                     data = newData;
@@ -1012,8 +1010,9 @@ public class IrisObject extends IrisRegistrant {
                 }
 
                 boolean wouldReplace = B.isSolid(placer.get(xx, yy, zz)) && B.isVineBlock(data);
+                boolean place = !data.getMaterial().equals(Material.AIR) && !data.getMaterial().equals(Material.CAVE_AIR) && !wouldReplace;
 
-                if (!data.getMaterial().equals(Material.AIR) && !data.getMaterial().equals(Material.CAVE_AIR) && !wouldReplace) {
+                if (data instanceof IrisCustomData || place) {
                     placer.set(xx, yy, zz, data);
                     if (tile != null) {
                         placer.setTile(xx, yy, zz, tile);

core/src/main/java/com/volmit/iris/engine/object/IrisRange.java

@@ -50,4 +50,10 @@ public class IrisRange {
     public boolean contains(int v) {
         return v >= min && v <= max;
     }
+
+    public IrisRange merge(IrisRange other) {
+        min = Math.min(min, other.min);
+        max = Math.max(max, other.max);
+        return this;
+    }
 }

core/src/main/java/com/volmit/iris/engine/object/IrisRate.java

@@ -43,7 +43,7 @@ public class IrisRate {
     }
 
     public long getInterval() {
-        long t = per.getMilliseconds() / (amount == 0 ? 1 : amount);
+        long t = per.toMilliseconds() / (amount == 0 ? 1 : amount);
         return Math.abs(t <= 0 ? 1 : t);
     }
 

core/src/main/java/com/volmit/iris/engine/object/IrisSpawner.java

@@ -19,6 +19,7 @@
 package com.volmit.iris.engine.object;
 
 import com.volmit.iris.core.loader.IrisRegistrant;
+import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.object.annotations.ArrayType;
 import com.volmit.iris.engine.object.annotations.Desc;
 import com.volmit.iris.util.collection.KList;
@@ -95,6 +96,37 @@ public class IrisSpawner extends IrisRegistrant {
         return timeBlock.isWithin(world) && weather.is(world);
     }
 
+    public boolean canSpawn(Engine engine) {
+        if (!isValid(engine.getWorld().realWorld()))
+            return false;
+
+        var rate = getMaximumRate();
+        return rate.isInfinite() || engine.getEngineData().getCooldown(this).canSpawn(rate);
+    }
+
+    public boolean canSpawn(Engine engine, int x, int z) {
+        if (!canSpawn(engine))
+            return false;
+
+        var rate = getMaximumRatePerChunk();
+        return rate.isInfinite() || engine.getEngineData().getChunk(x, z).getCooldown(this).canSpawn(rate);
+    }
+
+    public void spawn(Engine engine) {
+        if (getMaximumRate().isInfinite())
+            return;
+
+        engine.getEngineData().getCooldown(this).spawn(engine);
+    }
+
+    public void spawn(Engine engine, int x, int z) {
+        spawn(engine);
+        if (getMaximumRatePerChunk().isInfinite())
+            return;
+
+        engine.getEngineData().getChunk(x, z).getCooldown(this).spawn(engine);
+    }
+
     @Override
     public String getFolderName() {
         return "spawners";

core/src/main/java/com/volmit/iris/engine/object/IrisSpawnerCooldowns.java

@@ -0,0 +1,34 @@
+package com.volmit.iris.engine.object;
+
+import com.volmit.iris.engine.framework.Engine;
+import com.volmit.iris.util.collection.KMap;
+import lombok.EqualsAndHashCode;
+import lombok.NonNull;
+
+@EqualsAndHashCode
+public class IrisSpawnerCooldowns {
+    private final KMap<String, IrisEngineSpawnerCooldown> cooldowns = new KMap<>();
+
+    public IrisEngineSpawnerCooldown getCooldown(@NonNull IrisSpawner spawner) {
+        return getCooldown(spawner.getLoadKey());
+    }
+
+    public IrisEngineSpawnerCooldown getCooldown(@NonNull String loadKey) {
+        return cooldowns.computeIfAbsent(loadKey, k -> {
+            IrisEngineSpawnerCooldown cd = new IrisEngineSpawnerCooldown();
+            cd.setSpawner(loadKey);
+            return cd;
+        });
+    }
+
+    public void cleanup(Engine engine) {
+        cooldowns.values().removeIf(cd -> {
+            IrisSpawner sp = engine.getData().getSpawnerLoader().load(cd.getSpawner());
+            return sp == null || cd.canSpawn(sp.getMaximumRate());
+        });
+    }
+
+    public boolean isEmpty() {
+        return cooldowns.isEmpty();
+    }
+}

core/src/main/java/com/volmit/iris/engine/object/IrisWorld.java

@@ -48,6 +48,7 @@ public class IrisWorld {
     private long seed;
     private World.Environment environment;
     private World realWorld;
+    private IrisHeadless headless;
     private int minHeight;
     private int maxHeight;
 

core/src/main/java/com/volmit/iris/engine/object/TileData.java

@@ -35,7 +35,6 @@ import java.io.IOException;
 
 @SuppressWarnings("ALL")
 @Getter
-@ToString
 @EqualsAndHashCode
 @AllArgsConstructor
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
@@ -137,4 +136,9 @@ public class TileData implements Cloneable {
         clone.properties = properties.copy(); //TODO make a deep copy
         return clone;
     }
+
+    @Override
+    public String toString() {
+        return material.getKey() + gson.toJson(properties);
+    }
 }

core/src/main/java/com/volmit/iris/engine/platform/BukkitChunkGenerator.java

@@ -21,6 +21,8 @@ package com.volmit.iris.engine.platform;
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.loader.IrisData;
 import com.volmit.iris.core.nms.INMS;
+import com.volmit.iris.core.pregenerator.EmptyListener;
+import com.volmit.iris.core.pregenerator.methods.HeadlessPregenMethod;
 import com.volmit.iris.core.service.StudioSVC;
 import com.volmit.iris.engine.IrisEngine;
 import com.volmit.iris.engine.data.chunk.TerrainChunk;
@@ -32,10 +34,13 @@ import com.volmit.iris.engine.object.StudioMode;
 import com.volmit.iris.engine.platform.studio.StudioGenerator;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.data.IrisBiomeStorage;
+import com.volmit.iris.util.format.C;
+import com.volmit.iris.util.format.Form;
 import com.volmit.iris.util.hunk.Hunk;
 import com.volmit.iris.util.hunk.view.BiomeGridHunkHolder;
 import com.volmit.iris.util.hunk.view.ChunkDataHunkHolder;
 import com.volmit.iris.util.io.ReactiveFolder;
+import com.volmit.iris.util.plugin.VolmitSender;
 import com.volmit.iris.util.scheduling.ChronoLatch;
 import com.volmit.iris.util.scheduling.J;
 import com.volmit.iris.util.scheduling.Looper;
@@ -58,8 +63,6 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.io.File;
-import java.io.FileWriter;
-import java.io.IOException;
 import java.lang.reflect.Field;
 import java.util.List;
 import java.util.Random;
@@ -86,7 +89,6 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
     private final boolean studio;
     private final AtomicInteger a = new AtomicInteger(0);
     private final CompletableFuture<Integer> spawnChunks = new CompletableFuture<>();
-    private final boolean smartVanillaHeight;
     private Engine engine;
     private Looper hotloader;
     private StudioMode lastMode;
@@ -96,7 +98,7 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
 
     private boolean initialized = false;
 
-    public BukkitChunkGenerator(IrisWorld world, boolean studio, File dataLocation, String dimensionKey, boolean smartVanillaHeight) {
+    public BukkitChunkGenerator(IrisWorld world, boolean studio, File dataLocation, String dimensionKey) {
         setup = new AtomicBoolean(false);
         studioGenerator = null;
         dummyBiomeProvider = new DummyBiomeProvider();
@@ -108,7 +110,6 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
         this.dataLocation = dataLocation;
         this.dimensionKey = dimensionKey;
         this.folder = new ReactiveFolder(dataLocation, (_a, _b, _c) -> hotload());
-        this.smartVanillaHeight = smartVanillaHeight;
         Bukkit.getServer().getPluginManager().registerEvents(this, Iris.instance);
     }
 
@@ -186,14 +187,6 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
                 throw new RuntimeException("Missing Dimension: " + dimensionKey);
             }
         }
-        if (smartVanillaHeight) {
-            dimension.setSmartVanillaHeight(true);
-            try (FileWriter writer = new FileWriter(data.getDimensionLoader().fileFor(dimension))) {
-                writer.write(data.getGson().toJson(dimension));
-            } catch (IOException e) {
-                e.printStackTrace();
-            }
-        }
 
         lastMode = StudioMode.NORMAL;
         engine = new IrisEngine(new EngineTarget(world, dimension, data), studio);
@@ -264,6 +257,10 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
     }
 
     private Engine getEngine(WorldInfo world) {
+        return getEngine(world.getSeed());
+    }
+
+    private Engine getEngine(long seed) {
         if (setup.get()) {
             return getEngine();
         }
@@ -276,7 +273,7 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
             }
 
 
-            getWorld().setRawWorldSeed(world.getSeed());
+            getWorld().setRawWorldSeed(seed);
             setupEngine();
             setup.set(true);
             this.hotloader = studio ? new Looper() {
@@ -347,6 +344,21 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
         getEngine(world);
     }
 
+    @Override
+    public void prepareSpawnChunks(long seed, int radius) {
+        if (radius < 0 || new File(world.worldFolder(), "level.dat").exists())
+            return;
+        var engine = getEngine(seed);
+        var headless = new HeadlessPregenMethod(engine, 4);
+
+        for (int x = -radius; x <= radius; x++) {
+            for (int z = -radius; z <= radius; z++) {
+                headless.generateChunk(x, z, EmptyListener.INSTANCE);
+            }
+        }
+        headless.close();
+    }
+
     @Override
     public void generateNoise(@NotNull WorldInfo world, @NotNull Random random, int x, int z, @NotNull ChunkGenerator.ChunkData d) {
         try {

core/src/main/java/com/volmit/iris/engine/platform/PlatformChunkGenerator.java

@@ -49,4 +49,12 @@ public interface PlatformChunkGenerator extends Hotloadable, DataProvider {
     void touch(World world);
 
     CompletableFuture<Integer> getSpawnChunks();
+
+    void prepareSpawnChunks(long seed, int radius);
+
+    default int getGenerated() {
+        Engine engine = getEngine();
+        if (engine == null) return 0;
+        return engine.getGenerated();
+    }
 }

core/src/main/java/com/volmit/iris/util/data/B.java

@@ -22,10 +22,9 @@ import com.volmit.iris.Iris;
 import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.core.link.Identifier;
 import com.volmit.iris.core.service.ExternalDataSVC;
-import com.volmit.iris.engine.object.IrisCompat;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.collection.KMap;
-import com.volmit.iris.util.misc.E;
+import com.volmit.iris.util.data.registry.Materials;
 import com.volmit.iris.util.scheduling.ChronoLatch;
 import it.unimi.dsi.fastutil.ints.*;
 import org.bukkit.Bukkit;
@@ -47,7 +46,7 @@ public class B {
     private static final KMap<String, BlockData> custom = new KMap<>();
 
     private static final Material AIR_MATERIAL = Material.AIR;
-    private static final Material SHORT_GRASS = E.getOrDefault(Material.class, "GRASS", "SHORT_GRASS");
+    private static final Material SHORT_GRASS = Materials.GRASS;
     private static final BlockData AIR = AIR_MATERIAL.createBlockData();
     private static final IntSet foliageCache = buildFoliageCache();
     private static final IntSet deepslateCache = buildDeepslateCache();

core/src/main/java/com/volmit/iris/util/data/IrisCustomData.java

@@ -15,7 +15,7 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 @Data
-public class IrisBlockData implements BlockData {
+public class IrisCustomData implements BlockData {
 	private final @NonNull BlockData base;
 	private final @NotNull Identifier custom;
 
@@ -40,12 +40,12 @@ public class IrisBlockData implements BlockData {
 	@NotNull
 	@Override
 	public BlockData merge(@NotNull BlockData blockData) {
-		return new IrisBlockData(base.merge(blockData), custom);
+		return new IrisCustomData(base.merge(blockData), custom);
 	}
 
 	@Override
 	public boolean matches(@Nullable BlockData blockData) {
-		if (blockData instanceof IrisBlockData b)
+		if (blockData instanceof IrisCustomData b)
 			return custom.equals(b.custom) && base.matches(b.base);
 		return base.matches(blockData);
 	}
@@ -53,7 +53,7 @@ public class IrisBlockData implements BlockData {
 	@NotNull
 	@Override
 	public BlockData clone() {
-		return new IrisBlockData(base.clone(), custom);
+		return new IrisCustomData(base.clone(), custom);
 	}
 
 	@NotNull

core/src/main/java/com/volmit/iris/util/data/registry/Attributes.java

@@ -0,0 +1,7 @@
+package com.volmit.iris.util.data.registry;
+
+import org.bukkit.attribute.Attribute;
+
+public class Attributes {
+    public static final Attribute MAX_HEALTH = RegistryUtil.find(Attribute.class, "generic_max_health", "max_health");
+}

core/src/main/java/com/volmit/iris/util/data/registry/Materials.java

@@ -0,0 +1,9 @@
+package com.volmit.iris.util.data.registry;
+
+import org.bukkit.Material;
+
+import static com.volmit.iris.util.data.registry.RegistryUtil.find;
+
+public class Materials {
+    public static final Material GRASS = find(Material.class, "grass", "short_grass");
+}

core/src/main/java/com/volmit/iris/util/data/registry/Particles.java

@@ -0,0 +1,11 @@
+package com.volmit.iris.util.data.registry;
+
+import org.bukkit.Particle;
+
+import static com.volmit.iris.util.data.registry.RegistryUtil.find;
+
+public class Particles {
+    public static final Particle CRIT_MAGIC = find(Particle.class, "crit_magic", "crit");
+    public static final Particle REDSTONE = find(Particle.class,  "redstone", "dust");
+    public static final Particle ITEM = find(Particle.class,  "item_crack", "item");
+}

core/src/main/java/com/volmit/iris/util/data/registry/RegistryUtil.java

@@ -0,0 +1,209 @@
+package com.volmit.iris.util.data.registry;
+
+import com.volmit.iris.core.nms.container.Pair;
+import com.volmit.iris.engine.data.cache.AtomicCache;
+import lombok.NonNull;
+import org.bukkit.Bukkit;
+import org.bukkit.Keyed;
+import org.bukkit.NamespacedKey;
+import org.bukkit.Registry;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Modifier;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+
+@SuppressWarnings("unchecked")
+public class RegistryUtil {
+    private static final AtomicCache<RegistryLookup> registryLookup = new AtomicCache<>();
+    private static final Map<Class<?>, Map<NamespacedKey, Keyed>> KEYED_REGISTRY = new HashMap<>();
+    private static final Map<Class<?>, Map<NamespacedKey, Object>> ENUM_REGISTRY = new HashMap<>();
+    private static final Map<Class<?>, Registry<Keyed>> REGISTRY = new HashMap<>();
+
+    @NonNull
+    public static <T> T find(@NonNull Class<T> typeClass, @NonNull String... keys) {
+        return find(typeClass, defaultLookup(), keys);
+    }
+
+    @NonNull
+    public static <T> T find(@NonNull Class<T> typeClass, @Nullable Lookup<T> lookup, @NonNull String... keys) {
+        return find(typeClass, lookup, Arrays.stream(keys).map(NamespacedKey::minecraft).toArray(NamespacedKey[]::new));
+    }
+
+    public static <T> T find(@NonNull Class<T> typeClass, @NonNull NamespacedKey... keys) {
+        return find(typeClass, defaultLookup(), keys);
+    }
+
+    @NonNull
+    public static <T> T find(@NonNull Class<T> typeClass, @Nullable Lookup<T> lookup, @NonNull NamespacedKey... keys) {
+        if (keys.length == 0) throw new IllegalArgumentException("Need at least one key");
+        Registry<Keyed> registry = null;
+        if (Keyed.class.isAssignableFrom(typeClass)) {
+            registry = getRegistry(typeClass.asSubclass(Keyed.class));
+        }
+        if (registry == null) {
+            registry = REGISTRY.computeIfAbsent(typeClass, t -> Arrays.stream(Registry.class.getDeclaredFields())
+                    .filter(field -> Modifier.isStatic(field.getModifiers()) && Modifier.isPublic(field.getModifiers()))
+                    .filter(field -> Registry.class.isAssignableFrom(field.getType()))
+                    .filter(field -> ((ParameterizedType) field.getGenericType()).getActualTypeArguments()[0].equals(t))
+                    .map(field -> {
+                        try {
+                            return (Registry<Keyed>) field.get(null);
+                        } catch (IllegalAccessException e) {
+                            return null;
+                        }
+                    })
+                    .filter(Objects::nonNull)
+                    .findFirst()
+                    .orElse(null));
+        }
+
+        if (registry != null) {
+            for (NamespacedKey key : keys) {
+                Keyed value = registry.get(key);
+                if (value != null)
+                    return (T) value;
+            }
+        }
+
+        if (lookup != null)
+            return lookup.find(typeClass, keys);
+        throw new IllegalArgumentException("No element found for keys: " + Arrays.toString(keys));
+    }
+
+    @NonNull
+    public static <T> T findByField(@NonNull Class<T> typeClass, @NonNull NamespacedKey... keys) {
+        var values = KEYED_REGISTRY.computeIfAbsent(typeClass, RegistryUtil::getKeyedValues);
+        for (NamespacedKey key : keys) {
+            var value = values.get(key);
+            if (value != null)
+                return (T) value;
+        }
+        throw new IllegalArgumentException("No element found for keys: " + Arrays.toString(keys));
+    }
+
+    @NonNull
+    public static <T> T findByEnum(@NonNull Class<T> typeClass, @NonNull NamespacedKey... keys) {
+        var values = ENUM_REGISTRY.computeIfAbsent(typeClass, RegistryUtil::getEnumValues);
+        for (NamespacedKey key : keys) {
+            var value = values.get(key);
+            if (value != null)
+                return (T) value;
+        }
+        throw new IllegalArgumentException("No element found for keys: " + Arrays.toString(keys));
+    }
+
+    @NonNull
+    public static <T> Lookup<T> defaultLookup() {
+        return Lookup.combine(RegistryUtil::findByField, RegistryUtil::findByEnum);
+    }
+
+    private static Map<NamespacedKey, Keyed> getKeyedValues(@NonNull Class<?> typeClass) {
+        return Arrays.stream(typeClass.getDeclaredFields())
+                .filter(field -> Modifier.isPublic(field.getModifiers()) && Modifier.isStatic(field.getModifiers()))
+                .filter(field -> Keyed.class.isAssignableFrom(field.getType()))
+                .map(field -> {
+                    try {
+                        return (Keyed) field.get(null);
+                    } catch (Throwable e) {
+                        return null;
+                    }
+                })
+                .filter(Objects::nonNull)
+                .collect(Collectors.toMap(Keyed::getKey, Function.identity()));
+    }
+
+    private static Map<NamespacedKey, Object> getEnumValues(@NonNull Class<?> typeClass) {
+        return Arrays.stream(typeClass.getDeclaredFields())
+                .filter(field -> Modifier.isPublic(field.getModifiers()) && Modifier.isStatic(field.getModifiers()))
+                .filter(field -> typeClass.isAssignableFrom(field.getType()))
+                .map(field -> {
+                    try {
+                        return new Pair<>(NamespacedKey.minecraft(field.getName().toLowerCase()), field.get(null));
+                    } catch (Throwable e) {
+                        return null;
+                    }
+                })
+                .filter(Objects::nonNull)
+                .collect(Collectors.toMap(Pair::getA, Pair::getB));
+
+    }
+
+    @FunctionalInterface
+    public interface Lookup<T> {
+        @NonNull
+        T find(@NonNull Class<T> typeClass, @NonNull NamespacedKey... keys);
+
+        static <T> Lookup<T> combine(@NonNull Lookup<T>... lookups) {
+            if (lookups.length == 0) throw new IllegalArgumentException("Need at least one lookup");
+            return (typeClass, keys) -> {
+                for (Lookup<T> lookup : lookups) {
+                    try {
+                        return lookup.find(typeClass, keys);
+                    } catch (IllegalArgumentException ignored) {}
+                }
+                throw new IllegalArgumentException("No element found for keys: " + Arrays.toString(keys));
+            };
+        }
+    }
+
+    @Nullable
+    private static <T extends Keyed> Registry<T> getRegistry(@NotNull Class<T> type) {
+        RegistryLookup lookup = registryLookup.aquire(() -> {
+            RegistryLookup bukkit;
+            try {
+                bukkit = Bukkit::getRegistry;
+            } catch (Throwable ignored) {
+                bukkit = null;
+            }
+            return new DefaultRegistryLookup(bukkit);
+        });
+        return lookup.find(type);
+    }
+
+    private interface RegistryLookup {
+        @Nullable
+        <T extends Keyed> Registry<T> find(@NonNull Class<T> type);
+    }
+
+    private static class DefaultRegistryLookup implements RegistryLookup {
+        private final RegistryLookup bukkit;
+        private final Map<Type, Object> registries;
+
+        private DefaultRegistryLookup(RegistryLookup bukkit) {
+            this.bukkit = bukkit;
+            registries = Arrays.stream(Registry.class.getDeclaredFields())
+                    .filter(field -> Modifier.isPublic(field.getModifiers()) && Modifier.isStatic(field.getModifiers()))
+                    .filter(field -> Registry.class.isAssignableFrom(field.getType()))
+                    .map(field -> {
+                        var type = ((ParameterizedType) field.getGenericType()).getActualTypeArguments()[0];
+                        try {
+                            return new Pair<>(type, field.get(null));
+                        } catch (Throwable e) {
+                            return null;
+                        }
+                    })
+                    .filter(Objects::nonNull)
+                    .collect(Collectors.toMap(Pair::getA, Pair::getB, (a, b) -> a));
+        }
+
+        @Nullable
+        @Override
+        public <T extends Keyed> Registry<T> find(@NonNull Class<T> type) {
+            if (bukkit == null) return (Registry<T>) registries.get(type);
+            try {
+                return bukkit.find(type);
+            } catch (Throwable e) {
+                return (Registry<T>) registries.get(type);
+            }
+        }
+    }
+}

core/src/main/java/com/volmit/iris/util/hunk/view/ChunkDataHunkView.java

@@ -19,7 +19,7 @@
 package com.volmit.iris.util.hunk.view;
 
 import com.volmit.iris.util.data.B;
-import com.volmit.iris.util.data.IrisBlockData;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.hunk.Hunk;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.generator.ChunkGenerator.ChunkData;
@@ -73,7 +73,7 @@ public class ChunkDataHunkView implements Hunk<BlockData> {
         }
 
         try {
-            if (t instanceof IrisBlockData d)
+            if (t instanceof IrisCustomData d)
                 t = d.getBase();
             chunk.setBlock(x, y + chunk.getMinHeight(), z, t);
         } catch (Throwable ignored) {

core/src/main/java/com/volmit/iris/util/hunk/view/SyncChunkDataHunkHolder.java

@@ -0,0 +1,48 @@
+package com.volmit.iris.util.hunk.view;
+
+import com.volmit.iris.Iris;
+import com.volmit.iris.util.hunk.storage.ArrayHunk;
+import org.bukkit.Material;
+import org.bukkit.block.data.BlockData;
+import org.bukkit.generator.ChunkGenerator;
+
+public class SyncChunkDataHunkHolder extends ArrayHunk<BlockData> {
+    private static final BlockData AIR = Material.AIR.createBlockData();
+    private final ChunkGenerator.ChunkData chunk;
+    private final Thread mainThread = Thread.currentThread();
+
+    public SyncChunkDataHunkHolder(ChunkGenerator.ChunkData chunk) {
+        super(16, chunk.getMaxHeight() - chunk.getMinHeight(), 16);
+        this.chunk = chunk;
+    }
+
+    @Override
+    public void setRaw(int x, int y, int z, BlockData data) {
+        if (Thread.currentThread() != mainThread)
+            Iris.warn("SyncChunkDataHunkHolder is not on the main thread");
+        super.setRaw(x, y, z, data);
+    }
+
+    @Override
+    public BlockData getRaw(int x, int y, int z) {
+        if (Thread.currentThread() != mainThread)
+            Iris.warn("SyncChunkDataHunkHolder is not on the main thread");
+        BlockData b = super.getRaw(x, y, z);
+
+        return b != null ? b : AIR;
+    }
+
+    public void apply() {
+        for (int i = getHeight()-1; i >= 0; i--) {
+            for (int j = 0; j < getWidth(); j++) {
+                for (int k = 0; k < getDepth(); k++) {
+                    BlockData b = super.getRaw(j, i, k);
+
+                    if (b != null) {
+                        chunk.setBlock(j, i + chunk.getMinHeight(), k, b);
+                    }
+                }
+            }
+        }
+    }
+}

core/src/main/java/com/volmit/iris/util/io/IO.java

@@ -111,10 +111,12 @@ public class IO {
         return "¯\\_(ツ)_/¯";
     }
 
-    public static String hashRecursive(File base) {
+    public static long hashRecursive(File... bases) {
         LinkedList<File> files = new LinkedList<>();
         Set<File> processed = new HashSet<>();
-        files.add(base);
+        Arrays.parallelSort(bases, Comparator.comparing(File::getName));
+        files.addAll(Arrays.asList(bases));
+
         try {
             CRC32 crc = new CRC32();
             while (!files.isEmpty()) {
@@ -141,13 +143,13 @@ public class IO {
                 }
             }
 
-            return Long.toHexString(crc.getValue());
+            return crc.getValue();
         } catch (Throwable e) {
             Iris.reportError(e);
             e.printStackTrace();
         }
 
-        return "";
+        return 0;
     }
 
     public static String hash(File b) {

core/src/main/java/com/volmit/iris/util/mantle/MantleChunk.java

@@ -26,7 +26,6 @@ import com.volmit.iris.util.matter.IrisMatter;
 import com.volmit.iris.util.matter.Matter;
 import com.volmit.iris.util.matter.MatterSlice;
 import lombok.Getter;
-import lombok.Synchronized;
 
 import java.io.ByteArrayOutputStream;
 import java.io.DataOutputStream;
@@ -117,17 +116,16 @@ public class MantleChunk {
         ref.decrementAndGet();
     }
 
-    @Synchronized
     public void flag(MantleFlag flag, boolean f) {
         flags.set(flag.ordinal(), f ? 1 : 0);
     }
 
-    @Synchronized
     public void raiseFlag(MantleFlag flag, Runnable r) {
-        if (!isFlagged(flag)) {
-            flag(flag, true);
-            r.run();
+        synchronized (this) {
+            if (!isFlagged(flag)) flag(flag, true);
+            else return;
         }
+        r.run();
     }
 
     public boolean isFlagged(MantleFlag flag) {

core/src/main/java/com/volmit/iris/util/mantle/MantleFlag.java

@@ -35,7 +35,8 @@ public enum MantleFlag {
     ETCHED,
     TILE,
     CUSTOM,
-    DISCOVERED;
+    DISCOVERED,
+    CUSTOM_ACTIVE;
 
     static StateList getStateList() {
         return new StateList(MantleFlag.values());

core/src/main/java/com/volmit/iris/util/math/Position2.java

@@ -21,6 +21,8 @@ package com.volmit.iris.util.math;
 import com.volmit.iris.engine.object.IrisPosition;
 import org.bukkit.util.Vector;
 
+import java.util.function.BiFunction;
+
 public class Position2 {
     private int x;
     private int z;
@@ -94,4 +96,8 @@ public class Position2 {
     public IrisPosition toIris() {
         return new IrisPosition(x, 23, z);
     }
+
+    public <T> T convert(BiFunction<Integer, Integer, T> constructor) {
+        return constructor.apply(x, z);
+    }
 }

core/src/main/java/com/volmit/iris/util/math/Spiraler.java

@@ -63,7 +63,7 @@ public class Spiraler {
 
     public void next() {
         if ((-sizeX / 2 <= x) && (x <= sizeX / 2) && (-sizeZ / 2 <= z) && (z <= sizeZ / 2)) {
-            spiraled.on(x + ox, z + ox);
+            spiraled.on(x + ox, z + oz);
         }
 
         if ((x == z) || ((x < 0) && (x == -z)) || ((x > 0) && (x == 1 - z))) {

core/src/main/java/com/volmit/iris/util/matter/slices/BlockMatter.java

@@ -18,7 +18,7 @@
 
 package com.volmit.iris.util.matter.slices;
 
-import com.volmit.iris.util.data.IrisBlockData;
+import com.volmit.iris.util.data.IrisCustomData;
 import com.volmit.iris.util.data.palette.Palette;
 import com.volmit.iris.util.matter.Sliced;
 import org.bukkit.Bukkit;
@@ -41,7 +41,7 @@ public class BlockMatter extends RawMatter<BlockData> {
     public BlockMatter(int width, int height, int depth) {
         super(width, height, depth, BlockData.class);
         registerWriter(World.class, ((w, d, x, y, z) -> {
-            if (d instanceof IrisBlockData c)
+            if (d instanceof IrisCustomData c)
                 w.getBlockAt(x, y, z).setBlockData(c.getBase());
             else w.getBlockAt(x, y, z).setBlockData(d);
         }));

core/src/main/java/com/volmit/iris/util/misc/E.java

@@ -1,12 +0,0 @@
-package com.volmit.iris.util.misc;
-
-public class E {
-
-    public static <T extends Enum<T>> T getOrDefault(Class<T> enumClass, String name, String fallback) {
-        try {
-            return Enum.valueOf(enumClass, name);
-        } catch (Throwable e) {
-            return Enum.valueOf(enumClass, fallback);
-        }
-    }
-}