Opti pass 1

core/plugins/Iris/cache/instance

@@ -1 +1 @@
-149256635
+-1511497018

core/src/main/java/art/arcane/iris/core/pregenerator/IrisPregenerator.java

@@ -195,7 +195,6 @@ public class IrisPregenerator {
 
     private void init() {
         generator.init();
-        generator.save();
     }
 
     private void shutdown() {

core/src/main/java/art/arcane/iris/core/pregenerator/PregenTask.java

@@ -20,6 +20,7 @@ package art.arcane.iris.core.pregenerator;
 
 import art.arcane.volmlib.util.collection.KList;
 import art.arcane.volmlib.util.collection.KMap;
+import art.arcane.volmlib.util.math.PowerOfTwoCoordinates;
 import art.arcane.volmlib.util.math.Position2;
 import art.arcane.volmlib.util.math.Spiraled;
 import art.arcane.volmlib.util.math.Spiraler;
@@ -31,8 +32,7 @@ import java.util.Comparator;
 @Builder
 @Data
 public class PregenTask {
-    private static final Position2 ZERO = new Position2(0, 0);
-    private static final KMap<Position2, KList<Position2>> ORDERS = new KMap<>();
+    private static final KMap<Long, int[]> ORDERS = new KMap<>();
 
     @Builder.Default
     private final boolean gui = false;
@@ -54,16 +54,28 @@ public class PregenTask {
     }
 
     public static void iterateRegion(int xr, int zr, Spiraled s, Position2 pull) {
-        for (Position2 i : ORDERS.computeIfAbsent(pull, PregenTask::computeOrder)) {
-            s.on(i.getX() + (xr << 5), i.getZ() + (zr << 5));
+        iterateRegion(xr, zr, s, pull.getX(), pull.getZ());
+    }
+
+    public static void iterateRegion(int xr, int zr, Spiraled s, int pullX, int pullZ) {
+        for (int packed : orderForPull(pullX, pullZ)) {
+            s.on(PowerOfTwoCoordinates.unpackLocal32X(packed) + PowerOfTwoCoordinates.regionToChunk(xr), PowerOfTwoCoordinates.unpackLocal32Z(packed) + PowerOfTwoCoordinates.regionToChunk(zr));
         }
     }
 
     public static void iterateRegion(int xr, int zr, Spiraled s) {
-        iterateRegion(xr, zr, s, new Position2(-(xr << 5), -(zr << 5)));
+        iterateRegion(xr, zr, s, -PowerOfTwoCoordinates.regionToChunk(xr), -PowerOfTwoCoordinates.regionToChunk(zr));
     }
 
-    private static KList<Position2> computeOrder(Position2 pull) {
+    private static int[] orderForPull(int pullX, int pullZ) {
+        long key = orderKey(pullX, pullZ);
+        return ORDERS.computeIfAbsent(key, PregenTask::computeOrder);
+    }
+
+    private static int[] computeOrder(long key) {
+        int pullX = (int) (key >> 32);
+        int pullZ = (int) key;
+        Position2 pull = new Position2(pullX, pullZ);
         KList<Position2> p = new KList<>();
         new Spiraler(33, 33, (x, z) -> {
             int xx = (x + 15);
@@ -76,18 +88,30 @@ public class PregenTask {
         }).drain();
         p.sort(Comparator.comparing((i) -> i.distance(pull)));
 
-        return p;
+        int[] packed = new int[p.size()];
+        for (int index = 0; index < p.size(); index++) {
+            Position2 position = p.get(index);
+            packed[index] = PowerOfTwoCoordinates.packLocal32(position.getX(), position.getZ());
+        }
+
+        return packed;
+    }
+
+    private static long orderKey(int pullX, int pullZ) {
+        long high = (long) pullX << 32;
+        long low = pullZ & 0xFFFFFFFFL;
+        return high | low;
     }
 
     public void iterateRegions(Spiraled s) {
-        var bound = bounds.region();
+        Bound 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();
+        })).setOffset(PowerOfTwoCoordinates.blockToRegionFloor(center.getX()), PowerOfTwoCoordinates.blockToRegionFloor(center.getZ())).drain();
     }
 
     public void iterateChunks(int rX, int rZ, Spiraled s) {
-        var bound = bounds.chunk();
+        Bound bound = bounds.chunk();
         iterateRegion(rX, rZ, ((x, z) -> {
             if (bound.check(x, z)) s.on(x, z);
         }));
@@ -103,11 +127,11 @@ public class PregenTask {
         }
 
         KList<RegionChunkCursor> cursors = new KList<>();
+        Bound bound = bounds.chunk();
         iterateRegions((regionX, regionZ) -> {
-            KList<Position2> chunks = new KList<>();
-            iterateChunks(regionX, regionZ, (chunkX, chunkZ) -> chunks.add(new Position2(chunkX, chunkZ)));
-            if (!chunks.isEmpty()) {
-                cursors.add(new RegionChunkCursor(regionX, regionZ, chunks));
+            RegionChunkCursor cursor = new RegionChunkCursor(regionX, regionZ, bound);
+            if (cursor.hasNext()) {
+                cursors.add(cursor);
             }
         });
 
@@ -120,16 +144,18 @@ public class PregenTask {
                 }
 
                 hasProgress = true;
-                Position2 chunk = cursor.next();
-                if (chunk == null) {
+                long chunk = cursor.next();
+                if (chunk == Long.MIN_VALUE) {
                     continue;
                 }
+                int chunkX = (int) (chunk >> 32);
+                int chunkZ = (int) chunk;
 
                 boolean shouldContinue = spiraled.on(
                         cursor.getRegionX(),
                         cursor.getRegionZ(),
-                        chunk.getX(),
-                        chunk.getZ(),
+                        chunkX,
+                        chunkZ,
                         cursor.getIndex() == 1,
                         !cursor.hasNext()
                 );
@@ -155,8 +181,18 @@ public class PregenTask {
             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));
+            chunk = new Bound(
+                    PowerOfTwoCoordinates.blockToChunkFloor(minX),
+                    PowerOfTwoCoordinates.blockToChunkFloor(minZ),
+                    PowerOfTwoCoordinates.ceilDivPow2(maxX, PowerOfTwoCoordinates.CHUNK_BITS),
+                    PowerOfTwoCoordinates.ceilDivPow2(maxZ, PowerOfTwoCoordinates.CHUNK_BITS)
+            );
+            region = new Bound(
+                    PowerOfTwoCoordinates.blockToRegionFloor(minX),
+                    PowerOfTwoCoordinates.blockToRegionFloor(minZ),
+                    PowerOfTwoCoordinates.ceilDivPow2(maxX, PowerOfTwoCoordinates.REGION_BITS),
+                    PowerOfTwoCoordinates.ceilDivPow2(maxZ, PowerOfTwoCoordinates.REGION_BITS)
+            );
         }
 
         public Bound chunk() {
@@ -199,28 +235,60 @@ public class PregenTask {
     private static final class RegionChunkCursor {
         private final int regionX;
         private final int regionZ;
-        private final KList<Position2> chunks;
-        private int index;
+        private final Bound bound;
+        private final int[] order;
+        private final int chunkOffsetX;
+        private final int chunkOffsetZ;
+        private int scanIndex;
+        private int emittedIndex;
+        private int currentChunkX;
+        private int currentChunkZ;
+        private boolean hasCurrent;
 
-        private RegionChunkCursor(int regionX, int regionZ, KList<Position2> chunks) {
+        private RegionChunkCursor(int regionX, int regionZ, Bound bound) {
             this.regionX = regionX;
             this.regionZ = regionZ;
-            this.chunks = chunks;
-            this.index = 0;
+            this.bound = bound;
+            this.chunkOffsetX = PowerOfTwoCoordinates.regionToChunk(regionX);
+            this.chunkOffsetZ = PowerOfTwoCoordinates.regionToChunk(regionZ);
+            this.order = orderForPull(-chunkOffsetX, -chunkOffsetZ);
+            this.scanIndex = 0;
+            this.emittedIndex = 0;
+            advance();
         }
 
         private boolean hasNext() {
-            return index < chunks.size();
+            return hasCurrent;
         }
 
-        private Position2 next() {
+        private long next() {
             if (!hasNext()) {
-                return null;
+                return Long.MIN_VALUE;
             }
 
-            Position2 value = chunks.get(index);
-            index++;
-            return value;
+            long high = (long) currentChunkX << 32;
+            long low = currentChunkZ & 0xFFFFFFFFL;
+            emittedIndex++;
+            advance();
+            return high | low;
+        }
+
+        private void advance() {
+            hasCurrent = false;
+            while (scanIndex < order.length) {
+                int local = order[scanIndex];
+                scanIndex++;
+                int chunkX = chunkOffsetX + PowerOfTwoCoordinates.unpackLocal32X(local);
+                int chunkZ = chunkOffsetZ + PowerOfTwoCoordinates.unpackLocal32Z(local);
+                if (!bound.check(chunkX, chunkZ)) {
+                    continue;
+                }
+
+                currentChunkX = chunkX;
+                currentChunkZ = chunkZ;
+                hasCurrent = true;
+                return;
+            }
         }
 
         private int getRegionX() {
@@ -232,7 +300,7 @@ public class PregenTask {
         }
 
         private int getIndex() {
-            return index;
+            return emittedIndex;
         }
     }
 }

core/src/main/java/art/arcane/iris/core/pregenerator/cache/PregenCacheImpl.java

@@ -5,6 +5,7 @@ import art.arcane.volmlib.util.data.Varint;
 import art.arcane.volmlib.util.documentation.ChunkCoordinates;
 import art.arcane.volmlib.util.documentation.RegionCoordinates;
 import art.arcane.volmlib.util.io.IO;
+import art.arcane.volmlib.util.math.PowerOfTwoCoordinates;
 import it.unimi.dsi.fastutil.longs.Long2ObjectLinkedOpenHashMap;
 import net.jpountz.lz4.LZ4BlockInputStream;
 import net.jpountz.lz4.LZ4BlockOutputStream;
@@ -39,19 +40,22 @@ public class PregenCacheImpl implements PregenCache {
     @Override
     @ChunkCoordinates
     public boolean isChunkCached(int x, int z) {
-        return getPlate(x >> 10, z >> 10).isCached(
-                (x >> 5) & 31,
-                (z >> 5) & 31,
-                region -> region.isCached(x & 31, z & 31)
+        return getPlate(PowerOfTwoCoordinates.floorDivPow2(x, 10), PowerOfTwoCoordinates.floorDivPow2(z, 10)).isCached(
+                PowerOfTwoCoordinates.localMaskPow2(PowerOfTwoCoordinates.floorDivPow2(x, 5), PowerOfTwoCoordinates.REGION_CHUNK_BITS),
+                PowerOfTwoCoordinates.localMaskPow2(PowerOfTwoCoordinates.floorDivPow2(z, 5), PowerOfTwoCoordinates.REGION_CHUNK_BITS),
+                region -> region.isCached(
+                        PowerOfTwoCoordinates.localMaskPow2(x, PowerOfTwoCoordinates.REGION_CHUNK_BITS),
+                        PowerOfTwoCoordinates.localMaskPow2(z, PowerOfTwoCoordinates.REGION_CHUNK_BITS)
+                )
         );
     }
 
     @Override
     @RegionCoordinates
     public boolean isRegionCached(int x, int z) {
-        return getPlate(x >> 5, z >> 5).isCached(
-                x & 31,
-                z & 31,
+        return getPlate(PowerOfTwoCoordinates.floorDivPow2(x, 5), PowerOfTwoCoordinates.floorDivPow2(z, 5)).isCached(
+                PowerOfTwoCoordinates.localMaskPow2(x, PowerOfTwoCoordinates.REGION_CHUNK_BITS),
+                PowerOfTwoCoordinates.localMaskPow2(z, PowerOfTwoCoordinates.REGION_CHUNK_BITS),
                 Region::isCached
         );
     }
@@ -59,19 +63,22 @@ public class PregenCacheImpl implements PregenCache {
     @Override
     @ChunkCoordinates
     public void cacheChunk(int x, int z) {
-        getPlate(x >> 10, z >> 10).cache(
-                (x >> 5) & 31,
-                (z >> 5) & 31,
-                region -> region.cache(x & 31, z & 31)
+        getPlate(PowerOfTwoCoordinates.floorDivPow2(x, 10), PowerOfTwoCoordinates.floorDivPow2(z, 10)).cache(
+                PowerOfTwoCoordinates.localMaskPow2(PowerOfTwoCoordinates.floorDivPow2(x, 5), PowerOfTwoCoordinates.REGION_CHUNK_BITS),
+                PowerOfTwoCoordinates.localMaskPow2(PowerOfTwoCoordinates.floorDivPow2(z, 5), PowerOfTwoCoordinates.REGION_CHUNK_BITS),
+                region -> region.cache(
+                        PowerOfTwoCoordinates.localMaskPow2(x, PowerOfTwoCoordinates.REGION_CHUNK_BITS),
+                        PowerOfTwoCoordinates.localMaskPow2(z, PowerOfTwoCoordinates.REGION_CHUNK_BITS)
+                )
         );
     }
 
     @Override
     @RegionCoordinates
     public void cacheRegion(int x, int z) {
-        getPlate(x >> 5, z >> 5).cache(
-                x & 31,
-                z & 31,
+        getPlate(PowerOfTwoCoordinates.floorDivPow2(x, 5), PowerOfTwoCoordinates.floorDivPow2(z, 5)).cache(
+                PowerOfTwoCoordinates.localMaskPow2(x, PowerOfTwoCoordinates.REGION_CHUNK_BITS),
+                PowerOfTwoCoordinates.localMaskPow2(z, PowerOfTwoCoordinates.REGION_CHUNK_BITS),
                 Region::cache
         );
     }
@@ -215,7 +222,7 @@ public class PregenCacheImpl implements PregenCache {
                 return false;
             }
 
-            int index = x * 32 + z;
+            int index = PowerOfTwoCoordinates.packLocal32(x, z);
             Region region = regions[index];
             if (region == null) {
                 region = new Region();
@@ -240,7 +247,7 @@ public class PregenCacheImpl implements PregenCache {
                 return true;
             }
 
-            Region region = regions[x * 32 + z];
+            Region region = regions[PowerOfTwoCoordinates.packLocal32(x, z)];
             if (region == null) {
                 return false;
             }
@@ -294,7 +301,7 @@ public class PregenCacheImpl implements PregenCache {
                 return false;
             }
 
-            int index = x * 32 + z;
+            int index = PowerOfTwoCoordinates.packLocal32(x, z);
             int wordIndex = index >> 6;
             long bit = 1L << (index & 63);
             boolean current = (value[wordIndex] & bit) != 0L;
@@ -317,7 +324,7 @@ public class PregenCacheImpl implements PregenCache {
         }
 
         private boolean isCached(int x, int z) {
-            int index = x * 32 + z;
+            int index = PowerOfTwoCoordinates.packLocal32(x, z);
             if (count == SIZE) {
                 return true;
             }

core/src/main/java/art/arcane/iris/core/pregenerator/methods/AsyncPregenMethod.java

@@ -35,14 +35,17 @@ import io.papermc.lib.PaperLib;
 import org.bukkit.Chunk;
 import org.bukkit.World;
 
+import java.lang.reflect.Method;
 import java.lang.reflect.InvocationTargetException;
 import java.util.Locale;
 import java.util.Map;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
 
@@ -59,6 +62,9 @@ public class AsyncPregenMethod implements PregeneratorMethod {
     private final int effectiveWorkerThreads;
     private final int recommendedRuntimeConcurrencyCap;
     private final int configuredMaxConcurrency;
+    private final Method directChunkAtAsyncUrgentMethod;
+    private final Method directChunkAtAsyncMethod;
+    private final String chunkAccessMode;
     private final Executor executor;
     private final Semaphore semaphore;
     private final int threads;
@@ -90,10 +96,16 @@ public class AsyncPregenMethod implements PregeneratorMethod {
         IrisSettings.IrisSettingsPregen pregen = IrisSettings.get().getPregen();
         this.runtimeSchedulerMode = IrisRuntimeSchedulerMode.resolve(pregen);
         this.foliaRuntime = runtimeSchedulerMode == IrisRuntimeSchedulerMode.FOLIA;
+        ChunkAsyncMethodSelection chunkAsyncMethodSelection = resolveChunkAsyncMethodSelection(world);
+        this.directChunkAtAsyncUrgentMethod = chunkAsyncMethodSelection.urgentMethod();
+        this.directChunkAtAsyncMethod = chunkAsyncMethodSelection.standardMethod();
+        this.chunkAccessMode = chunkAsyncMethodSelection.mode();
         int detectedWorkerPoolThreads = resolveWorkerPoolThreads();
         int detectedCpuThreads = Math.max(1, Runtime.getRuntime().availableProcessors());
         int configuredWorldGenThreads = Math.max(1, IrisSettings.get().getConcurrency().getWorldGenThreads());
-        int workerThreadsForCap = Math.max(detectedCpuThreads, Math.max(configuredWorldGenThreads, Math.max(1, detectedWorkerPoolThreads)));
+        int workerThreadsForCap = foliaRuntime
+                ? resolveFoliaConcurrencyWorkerThreads(detectedWorkerPoolThreads, detectedCpuThreads, configuredWorldGenThreads)
+                : resolvePaperLikeConcurrencyWorkerThreads(detectedWorkerPoolThreads, detectedCpuThreads, configuredWorldGenThreads);
         if (foliaRuntime) {
             this.paperLikeBackendMode = IrisPaperLikeBackendMode.AUTO;
             this.backendMode = "folia-region";
@@ -156,11 +168,14 @@ public class AsyncPregenMethod implements PregeneratorMethod {
 
     private void unloadAndSaveAllChunks() {
         if (foliaRuntime) {
-            // Folia requires world/chunk mutations to be region-owned; periodic global unload/save is unsafe.
             lastUse.clear();
             return;
         }
 
+        if (lastUse.isEmpty()) {
+            return;
+        }
+
         try {
             J.sfut(() -> {
                 if (world == null) {
@@ -169,6 +184,7 @@ public class AsyncPregenMethod implements PregeneratorMethod {
                 }
 
                 long minTime = M.ms() - 10_000;
+                AtomicBoolean unloaded = new AtomicBoolean(false);
                 lastUse.entrySet().removeIf(i -> {
                     final Chunk chunk = i.getKey();
                     final Long lastUseTime = i.getValue();
@@ -176,11 +192,14 @@ public class AsyncPregenMethod implements PregeneratorMethod {
                         return true;
                     if (lastUseTime < minTime) {
                         chunk.unload();
+                        unloaded.set(true);
                         return true;
                     }
                     return false;
                 });
-                world.save();
+                if (unloaded.get()) {
+                    world.save();
+                }
             }).get();
         } catch (Throwable e) {
             e.printStackTrace();
@@ -294,6 +313,14 @@ public class AsyncPregenMethod implements PregeneratorMethod {
         return recommendedCap;
     }
 
+    static int resolvePaperLikeConcurrencyWorkerThreads(int detectedWorkerPoolThreads, int detectedCpuThreads, int configuredWorldGenThreads) {
+        if (detectedWorkerPoolThreads > 0) {
+            return detectedWorkerPoolThreads;
+        }
+
+        return Math.max(1, Math.max(detectedCpuThreads, configuredWorldGenThreads));
+    }
+
     static int computeFoliaRecommendedCap(int workerThreads) {
         int normalizedWorkers = Math.max(1, workerThreads);
         int recommendedCap = normalizedWorkers * 4;
@@ -308,6 +335,10 @@ public class AsyncPregenMethod implements PregeneratorMethod {
         return recommendedCap;
     }
 
+    static int resolveFoliaConcurrencyWorkerThreads(int detectedWorkerPoolThreads, int detectedCpuThreads, int configuredWorldGenThreads) {
+        return Math.max(detectedCpuThreads, Math.max(configuredWorldGenThreads, Math.max(1, detectedWorkerPoolThreads)));
+    }
+
     static int applyRuntimeConcurrencyCap(int maxConcurrency, boolean foliaRuntime, int workerThreads) {
         int normalizedMaxConcurrency = Math.max(1, maxConcurrency);
         int recommendedCap = foliaRuntime
@@ -407,6 +438,7 @@ public class AsyncPregenMethod implements PregeneratorMethod {
         Iris.info("Async pregen init: world=" + world.getName()
                 + ", mode=" + runtimeSchedulerMode.name().toLowerCase(Locale.ROOT)
                 + ", backend=" + backendMode
+                + ", chunkAccess=" + chunkAccessMode
                 + ", threads=" + threads
                 + ", adaptiveLimit=" + adaptiveInFlightLimit.get()
                 + ", workerPoolThreads=" + workerPoolThreads
@@ -487,6 +519,96 @@ public class AsyncPregenMethod implements PregeneratorMethod {
         executor.generate(x, z, listener);
     }
 
+    private CompletableFuture<Chunk> requestChunkAsync(int x, int z) {
+        Throwable failure = null;
+
+        if (directChunkAtAsyncUrgentMethod != null) {
+            try {
+                return invokeChunkFuture(directChunkAtAsyncUrgentMethod, x, z, true, urgent);
+            } catch (Throwable e) {
+                failure = e;
+            }
+        }
+
+        if (directChunkAtAsyncMethod != null) {
+            try {
+                return invokeChunkFuture(directChunkAtAsyncMethod, x, z, true, urgent);
+            } catch (Throwable e) {
+                if (failure == null) {
+                    failure = e;
+                }
+            }
+        }
+
+        try {
+            CompletableFuture<Chunk> future = PaperLib.getChunkAtAsync(world, x, z, true, urgent);
+            if (future != null) {
+                return future;
+            }
+        } catch (Throwable e) {
+            if (failure == null) {
+                failure = e;
+            }
+        }
+
+        if (failure == null) {
+            failure = new IllegalStateException("Chunk async access returned no future.");
+        }
+
+        return CompletableFuture.failedFuture(new IllegalStateException("Failed to request async chunk " + x + "," + z + " in world " + world.getName(), failure));
+    }
+
+    @SuppressWarnings("unchecked")
+    private CompletableFuture<Chunk> invokeChunkFuture(Method method, int x, int z, boolean generate, boolean urgentRequest) throws Throwable {
+        Object result;
+        try {
+            if (method.getParameterCount() == 4) {
+                result = method.invoke(world, x, z, generate, urgentRequest);
+            } else {
+                result = method.invoke(world, x, z, generate);
+            }
+        } catch (InvocationTargetException e) {
+            throw e.getCause() == null ? e : e.getCause();
+        }
+
+        if (result instanceof CompletableFuture<?>) {
+            return (CompletableFuture<Chunk>) result;
+        }
+
+        throw new IllegalStateException("Chunk async method returned a non-future result.");
+    }
+
+    private static ChunkAsyncMethodSelection resolveChunkAsyncMethodSelection(World world) {
+        if (world == null) {
+            return new ChunkAsyncMethodSelection(null, null, "paperlib");
+        }
+
+        Class<?> worldClass = world.getClass();
+        Method urgentMethod = resolveChunkAsyncMethod(worldClass, int.class, int.class, boolean.class, boolean.class);
+        Method standardMethod = resolveChunkAsyncMethod(worldClass, int.class, int.class, boolean.class);
+        if (urgentMethod != null) {
+            return new ChunkAsyncMethodSelection(urgentMethod, standardMethod, "world#getChunkAtAsync(int,int,boolean,boolean)");
+        }
+        if (standardMethod != null) {
+            return new ChunkAsyncMethodSelection(null, standardMethod, "world#getChunkAtAsync(int,int,boolean)");
+        }
+        return new ChunkAsyncMethodSelection(null, null, "paperlib");
+    }
+
+    private static Method resolveChunkAsyncMethod(Class<?> worldClass, Class<?>... parameterTypes) {
+        try {
+            return worldClass.getMethod("getChunkAtAsync", parameterTypes);
+        } catch (NoSuchMethodException ignored) {
+        }
+
+        try {
+            return World.class.getMethod("getChunkAtAsync", parameterTypes);
+        } catch (NoSuchMethodException ignored) {
+        }
+
+        return null;
+    }
+
     @Override
     public Mantle getMantle() {
         if (IrisToolbelt.isIrisWorld(world)) {
@@ -547,14 +669,14 @@ public class AsyncPregenMethod implements PregeneratorMethod {
         @Override
         public void generate(int x, int z, PregenListener listener) {
             try {
-                PaperLib.getChunkAtAsync(world, x, z, true, urgent)
+                requestChunkAsync(x, z)
                         .orTimeout(timeoutSeconds, TimeUnit.SECONDS)
                         .whenComplete((chunk, throwable) -> completeFoliaChunk(x, z, listener, chunk, throwable));
                 return;
             } catch (Throwable ignored) {
             }
 
-            if (!J.runRegion(world, x, z, () -> PaperLib.getChunkAtAsync(world, x, z, true, urgent)
+            if (!J.runRegion(world, x, z, () -> requestChunkAsync(x, z)
                     .orTimeout(timeoutSeconds, TimeUnit.SECONDS)
                     .whenComplete((chunk, throwable) -> completeFoliaChunk(x, z, listener, chunk, throwable)))) {
                 markFinished(false);
@@ -598,7 +720,7 @@ public class AsyncPregenMethod implements PregeneratorMethod {
             service.submit(() -> {
                 boolean success = false;
                 try {
-                    Chunk i = PaperLib.getChunkAtAsync(world, x, z, true, urgent)
+                    Chunk i = requestChunkAsync(x, z)
                             .orTimeout(timeoutSeconds, TimeUnit.SECONDS)
                             .exceptionally(e -> onChunkFutureFailure(x, z, e))
                             .get();
@@ -632,7 +754,7 @@ public class AsyncPregenMethod implements PregeneratorMethod {
     private class TicketExecutor implements Executor {
         @Override
         public void generate(int x, int z, PregenListener listener) {
-            PaperLib.getChunkAtAsync(world, x, z, true, urgent)
+            requestChunkAsync(x, z)
                     .orTimeout(timeoutSeconds, TimeUnit.SECONDS)
                     .exceptionally(e -> onChunkFutureFailure(x, z, e))
                     .thenAccept(i -> {
@@ -653,4 +775,7 @@ public class AsyncPregenMethod implements PregeneratorMethod {
                     });
         }
     }
+
+    private record ChunkAsyncMethodSelection(Method urgentMethod, Method standardMethod, String mode) {
+    }
 }

core/src/main/java/art/arcane/iris/core/service/IrisEngineSVC.java

@@ -14,8 +14,10 @@ import art.arcane.volmlib.util.math.RNG;
 import art.arcane.iris.util.common.plugin.IrisService;
 import art.arcane.iris.util.common.plugin.VolmitSender;
 import art.arcane.volmlib.util.scheduling.Looper;
+import art.arcane.iris.util.project.stream.utility.CachedDoubleStream2D;
 import art.arcane.iris.util.project.stream.utility.CachedStream2D;
 import art.arcane.iris.util.project.stream.utility.CachedStream3D;
+import art.arcane.iris.core.gui.PregeneratorJob;
 import lombok.Synchronized;
 import org.bukkit.Bukkit;
 import org.bukkit.World;
@@ -98,7 +100,7 @@ public class IrisEngineSVC implements IrisService {
         double total = 0D;
         int count = 0;
         for (var cache : preservation.getCaches()) {
-            if (!(cache instanceof CachedStream2D<?>)) {
+            if (!(cache instanceof CachedStream2D<?>) && !(cache instanceof CachedDoubleStream2D)) {
                 continue;
             }
 
@@ -126,6 +128,7 @@ public class IrisEngineSVC implements IrisService {
             var type = switch (cache) {
                 case ResourceLoader<?> ignored -> 0;
                 case CachedStream2D<?> ignored -> 1;
+                case CachedDoubleStream2D ignored -> 1;
                 case CachedStream3D<?> ignored -> 2;
                 default -> 3;
             };
@@ -250,6 +253,10 @@ public class IrisEngineSVC implements IrisService {
         return false;
     }
 
+    static boolean shouldSkipMantleReductionForMaintenance(boolean maintenanceActive, boolean pregeneratorTargetsWorld) {
+        return maintenanceActive && !pregeneratorTargetsWorld;
+    }
+
     private final class Registered {
         private final String name;
         private final PlatformChunkGenerator access;
@@ -286,7 +293,7 @@ public class IrisEngineSVC implements IrisService {
                             || !shouldReduce(engine))
                         return;
                     World engineWorld = engine.getWorld().realWorld();
-                    if (engineWorld != null && IrisToolbelt.isWorldMaintenanceActive(engineWorld)) {
+                    if (shouldSkipForMaintenance(engineWorld)) {
                         return;
                     }
 
@@ -313,7 +320,7 @@ public class IrisEngineSVC implements IrisService {
                             || !shouldReduce(engine))
                         return;
                     World engineWorld = engine.getWorld().realWorld();
-                    if (engineWorld != null && IrisToolbelt.isWorldMaintenanceActive(engineWorld)) {
+                    if (shouldSkipForMaintenance(engineWorld)) {
                         return;
                     }
 
@@ -363,7 +370,32 @@ public class IrisEngineSVC implements IrisService {
         }
 
         private boolean shouldReduce(Engine engine) {
-            return !engine.isStudio() || IrisSettings.get().getPerformance().isTrimMantleInStudio();
+            if (!engine.isStudio() || IrisSettings.get().getPerformance().isTrimMantleInStudio()) {
+                return true;
+            }
+
+            World world = engine.getWorld().realWorld();
+            if (world == null) {
+                return false;
+            }
+
+            PregeneratorJob pregeneratorJob = PregeneratorJob.getInstance();
+            return pregeneratorJob != null && pregeneratorJob.targetsWorld(world);
+        }
+
+        private boolean shouldSkipForMaintenance(@Nullable World world) {
+            if (world == null) {
+                return false;
+            }
+
+            boolean maintenanceActive = IrisToolbelt.isWorldMaintenanceActive(world);
+            if (!maintenanceActive) {
+                return false;
+            }
+
+            PregeneratorJob pregeneratorJob = PregeneratorJob.getInstance();
+            boolean pregeneratorTargetsWorld = pregeneratorJob != null && pregeneratorJob.targetsWorld(world);
+            return shouldSkipMantleReductionForMaintenance(maintenanceActive, pregeneratorTargetsWorld);
         }
     }
 }

core/src/main/java/art/arcane/iris/engine/IrisComplex.java

@@ -200,11 +200,11 @@ public class IrisComplex implements DataProvider {
         heightStream = ProceduralStream.of((x, z) -> {
             IrisBiome b = focusBiome != null ? focusBiome : baseBiomeStream.get(x, z);
             return getHeight(engine, b, x, z, engine.getSeedManager().getHeight());
-        }, Interpolated.DOUBLE).cache2D("heightStream", engine, cacheSize).waste("Height Stream");
+        }, Interpolated.DOUBLE).cache2DDouble("heightStream", engine, cacheSize).waste("Height Stream");
         roundedHeighteightStream = heightStream.contextInjecting((c, x, z) -> IrisContext.getOr(engine).getChunkContext().getHeight().get(x, z))
                 .round().waste("Rounded Height Stream");
         slopeStream = heightStream.contextInjecting((c, x, z) -> IrisContext.getOr(engine).getChunkContext().getHeight().get(x, z))
-                .slope(3).cache2D("slopeStream", engine, cacheSize).waste("Slope Stream");
+                .slope(3).cache2DDouble("slopeStream", engine, cacheSize).waste("Slope Stream");
         trueBiomeStream = focusBiome != null ? ProceduralStream.of((x, y) -> focusBiome, Interpolated.of(a -> 0D,
                         b -> focusBiome))
                 .cache2D("trueBiomeStream-focus", engine, cacheSize) : heightStream
@@ -215,7 +215,7 @@ public class IrisComplex implements DataProvider {
         trueBiomeDerivativeStream = trueBiomeStream.contextInjecting((c, x, z) -> IrisContext.getOr(engine).getChunkContext().getBiome().get(x, z))
                 .convert(IrisBiome::getDerivative).cache2D("trueBiomeDerivativeStream", engine, cacheSize).waste("True Biome Derivative Stream");
         heightFluidStream = heightStream.contextInjecting((c, x, z) -> IrisContext.getOr(engine).getChunkContext().getHeight().get(x, z))
-                .max(fluidHeight).cache2D("heightFluidStream", engine, cacheSize).waste("Height Fluid Stream");
+                .max(fluidHeight).cache2DDouble("heightFluidStream", engine, cacheSize).waste("Height Fluid Stream");
         maxHeightStream = ProceduralStream.ofDouble((x, z) -> height).waste("Max Height Stream");
         terrainSurfaceDecoration = trueBiomeStream.contextInjecting((c, x, z) -> IrisContext.getOr(engine).getChunkContext().getBiome().get(x, z))
                 .convertAware2D((b, xx, zz) -> decorateFor(b, xx, zz, IrisDecorationPart.NONE)).cache2D("terrainSurfaceDecoration", engine, cacheSize).waste("Surface Decoration Stream");

core/src/main/java/art/arcane/iris/engine/IrisWorldManager.java

@@ -37,6 +37,7 @@ import art.arcane.volmlib.util.mantle.runtime.Mantle;
 import art.arcane.volmlib.util.mantle.runtime.MantleChunk;
 import art.arcane.volmlib.util.mantle.flag.MantleFlag;
 import art.arcane.volmlib.util.math.M;
+import art.arcane.volmlib.util.math.PowerOfTwoCoordinates;
 import art.arcane.volmlib.util.math.Position2;
 import art.arcane.volmlib.util.math.RNG;
 import art.arcane.volmlib.util.matter.Matter;
@@ -219,8 +220,8 @@ public class IrisWorldManager extends EngineAssignedWorldManager {
             }
 
             J.runEntity(player, () -> {
-                int centerX = player.getLocation().getBlockX() >> 4;
-                int centerZ = player.getLocation().getBlockZ() >> 4;
+                int centerX = PowerOfTwoCoordinates.blockToChunkFloor(player.getLocation().getBlockX());
+                int centerZ = PowerOfTwoCoordinates.blockToChunkFloor(player.getLocation().getBlockZ());
                 int radius = 1;
                 for (int x = -radius; x <= radius; x++) {
                     for (int z = -radius; z <= radius; z++) {
@@ -278,8 +279,8 @@ public class IrisWorldManager extends EngineAssignedWorldManager {
             }
 
             J.runEntity(player, () -> {
-                int centerX = player.getLocation().getBlockX() >> 4;
-                int centerZ = player.getLocation().getBlockZ() >> 4;
+                int centerX = PowerOfTwoCoordinates.blockToChunkFloor(player.getLocation().getBlockX());
+                int centerZ = PowerOfTwoCoordinates.blockToChunkFloor(player.getLocation().getBlockZ());
                 int radius = 1;
 
                 for (int x = -radius; x <= radius; x++) {
@@ -632,12 +633,12 @@ public class IrisWorldManager extends EngineAssignedWorldManager {
                                 .filter((i) -> i.isValid(biome)),
                         Stream.concat(getData()
                                         .getSpawnerLoader()
-                                        .loadAll(getEngine().getRegion(c.getX() << 4, c.getZ() << 4).getEntitySpawners())
+                                        .loadAll(getEngine().getRegion(PowerOfTwoCoordinates.chunkToBlock(c.getX()), PowerOfTwoCoordinates.chunkToBlock(c.getZ())).getEntitySpawners())
                                         .shuffleCopy(RNG.r)
                                         .stream()
                                         .filter(filter),
                                 getData().getSpawnerLoader()
-                                        .loadAll(getEngine().getSurfaceBiome(c.getX() << 4, c.getZ() << 4).getEntitySpawners())
+                                        .loadAll(getEngine().getSurfaceBiome(PowerOfTwoCoordinates.chunkToBlock(c.getX()), PowerOfTwoCoordinates.chunkToBlock(c.getZ())).getEntitySpawners())
                                         .shuffleCopy(RNG.r)
                                         .stream()
                                         .filter(filter)))
@@ -668,13 +669,13 @@ public class IrisWorldManager extends EngineAssignedWorldManager {
 
     private void spawn(IrisPosition pos, IrisEntitySpawn i) {
         IrisSpawner ref = i.getReferenceSpawner();
-        if (!ref.canSpawn(getEngine(), pos.getX() >> 4, pos.getZ() >> 4))
+        if (!ref.canSpawn(getEngine(), PowerOfTwoCoordinates.blockToChunkFloor(pos.getX()), PowerOfTwoCoordinates.blockToChunkFloor(pos.getZ())))
             return;
 
         int s = i.spawn(getEngine(), pos, RNG.r);
         actuallySpawned += s;
         if (s > 0) {
-            ref.spawn(getEngine(), pos.getX() >> 4, pos.getZ() >> 4);
+            ref.spawn(getEngine(), PowerOfTwoCoordinates.blockToChunkFloor(pos.getX()), PowerOfTwoCoordinates.blockToChunkFloor(pos.getZ()));
             energy -= s * ((i.getEnergyMultiplier() * ref.getEnergyMultiplier() * 1));
         }
     }

core/src/main/java/art/arcane/iris/engine/mantle/components/IrisCaveCarver3D.java

@@ -26,6 +26,7 @@ import art.arcane.iris.engine.object.IrisCaveProfile;
 import art.arcane.iris.engine.object.IrisRange;
 import art.arcane.iris.util.project.noise.CNG;
 import art.arcane.volmlib.util.mantle.runtime.MantleChunk;
+import art.arcane.volmlib.util.math.PowerOfTwoCoordinates;
 import art.arcane.volmlib.util.math.RNG;
 import art.arcane.volmlib.util.matter.Matter;
 import art.arcane.volmlib.util.matter.MatterCavern;
@@ -55,8 +56,11 @@ public class IrisCaveCarver3D {
     private final MatterCavern carveAir;
     private final MatterCavern carveLava;
     private final MatterCavern carveForcedAir;
+    private final double normalizationFactor;
     private final double baseWeight;
     private final double detailWeight;
+    private final double detailMinContribution;
+    private final double detailMaxContribution;
     private final double warpStrength;
     private final boolean hasWarp;
     private final boolean hasModules;
@@ -93,8 +97,11 @@ public class IrisCaveCarver3D {
 
         this.modules = moduleStates.toArray(new ModuleState[0]);
         double normalization = weight <= 0 ? 1 : weight;
+        normalizationFactor = normalization;
         inverseNormalization = 1D / normalization;
         hasModules = modules.length > 0;
+        detailMinContribution = -detailWeight;
+        detailMaxContribution = detailWeight;
     }
 
     public int carve(MantleWriter writer, int chunkX, int chunkZ) {
@@ -178,8 +185,8 @@ public class IrisCaveCarver3D {
                 return 0;
             }
 
-            int x0 = chunkX << 4;
-            int z0 = chunkZ << 4;
+            int x0 = PowerOfTwoCoordinates.chunkToBlock(chunkX);
+            int z0 = PowerOfTwoCoordinates.chunkToBlock(chunkZ);
             int[] columnMaxY = scratch.columnMaxY;
             int[] surfaceBreakFloorY = scratch.surfaceBreakFloorY;
             boolean[] surfaceBreakColumn = scratch.surfaceBreakColumn;
@@ -193,7 +200,7 @@ public class IrisCaveCarver3D {
                 int x = x0 + lx;
                 for (int lz = 0; lz < 16; lz++) {
                     int z = z0 + lz;
-                    int index = (lx << 4) | lz;
+                    int index = PowerOfTwoCoordinates.packLocal16(lx, lz);
                     int columnSurfaceY;
                     if (precomputedSurfaceHeights != null && precomputedSurfaceHeights.length > index) {
                         columnSurfaceY = precomputedSurfaceHeights[index];
@@ -202,7 +209,7 @@ public class IrisCaveCarver3D {
                     }
                     int clearanceTopY = Math.min(maxY, Math.max(minY, columnSurfaceY - surfaceClearance));
                     boolean breakColumn = allowSurfaceBreak
-                            && signed(surfaceBreakDensity.noiseFast2D(x, z)) >= surfaceBreakNoiseThreshold;
+                            && surfaceBreakDensity.noiseFastSigned2D(x, z) >= surfaceBreakNoiseThreshold;
                     int columnTopY = breakColumn
                             ? Math.min(maxY, Math.max(minY, columnSurfaceY))
                             : clearanceTopY;
@@ -399,13 +406,14 @@ public class IrisCaveCarver3D {
         }
 
         int[] planeColumnIndices = scratch.planeColumnIndices;
-        double[] planeDensity = scratch.planeDensity;
-        int minSection = minY >> 4;
-        int maxSection = maxY >> 4;
+        double[] planeThresholdLimit = scratch.planeThresholdLimit;
+        boolean[] planeCarve = scratch.planeCarve;
+        int minSection = PowerOfTwoCoordinates.floorDivPow2(minY, 4);
+        int maxSection = PowerOfTwoCoordinates.floorDivPow2(maxY, 4);
 
         for (int sectionIndex = minSection; sectionIndex <= maxSection; sectionIndex++) {
-            int sectionMinY = Math.max(minY, sectionIndex << 4);
-            int sectionMaxY = Math.min(maxY, (sectionIndex << 4) + 15);
+            int sectionMinY = Math.max(minY, PowerOfTwoCoordinates.chunkToBlock(sectionIndex));
+            int sectionMaxY = Math.min(maxY, PowerOfTwoCoordinates.chunkToBlock(sectionIndex) + 15);
             MatterSlice<MatterCavern> cavernSlice = resolveCavernSlice(scratch, chunk, sectionIndex);
 
             for (int y = sectionMinY; y <= sectionMaxY; y++) {
@@ -415,7 +423,14 @@ public class IrisCaveCarver3D {
                         continue;
                     }
 
-                    planeColumnIndices[planeCount] = activeColumnIndices[activeIndex];
+                    int columnIndex = activeColumnIndices[activeIndex];
+                    planeColumnIndices[planeCount] = columnIndex;
+                    double localThreshold = passThreshold[columnIndex];
+                    if (surfaceBreakColumn[columnIndex] && y >= surfaceBreakFloorY[columnIndex]) {
+                        localThreshold += surfaceBreakThresholdBoost;
+                    }
+                    localThreshold -= verticalEdgeFade[y - minY];
+                    planeThresholdLimit[planeCount] = localThreshold * normalizationFactor;
                     planeCount++;
                 }
 
@@ -423,24 +438,19 @@ public class IrisCaveCarver3D {
                     continue;
                 }
 
-                fillDensityPlane(x0, z0, y, planeColumnIndices, planeCount, planeDensity);
+                classifyDensityPlane(x0, z0, y, planeColumnIndices, planeThresholdLimit, planeCount, planeCarve);
                 int fadeIndex = y - minY;
                 int localY = y & 15;
                 MatterCavern matter = matterByY[fadeIndex];
 
                 if (skipExistingCarved) {
                     for (int planeIndex = 0; planeIndex < planeCount; planeIndex++) {
-                        int columnIndex = planeColumnIndices[planeIndex];
-                        double localThreshold = passThreshold[columnIndex];
-                        if (surfaceBreakColumn[columnIndex] && y >= surfaceBreakFloorY[columnIndex]) {
-                            localThreshold += surfaceBreakThresholdBoost;
-                        }
-                        localThreshold -= verticalEdgeFade[fadeIndex];
-                        if (planeDensity[planeIndex] > localThreshold) {
+                        if (!planeCarve[planeIndex]) {
                             continue;
                         }
 
-                        int localX = columnIndex >> 4;
+                        int columnIndex = planeColumnIndices[planeIndex];
+                        int localX = PowerOfTwoCoordinates.unpackLocal16X(columnIndex);
                         int localZ = columnIndex & 15;
                         if (cavernSlice.get(localX, localY, localZ) != null) {
                             continue;
@@ -453,17 +463,12 @@ public class IrisCaveCarver3D {
                 }
 
                 for (int planeIndex = 0; planeIndex < planeCount; planeIndex++) {
-                    int columnIndex = planeColumnIndices[planeIndex];
-                    double localThreshold = passThreshold[columnIndex];
-                    if (surfaceBreakColumn[columnIndex] && y >= surfaceBreakFloorY[columnIndex]) {
-                        localThreshold += surfaceBreakThresholdBoost;
-                    }
-                    localThreshold -= verticalEdgeFade[fadeIndex];
-                    if (planeDensity[planeIndex] > localThreshold) {
+                    if (!planeCarve[planeIndex]) {
                         continue;
                     }
 
-                    int localX = columnIndex >> 4;
+                    int columnIndex = planeColumnIndices[planeIndex];
+                    int localX = PowerOfTwoCoordinates.unpackLocal16X(columnIndex);
                     int localZ = columnIndex & 15;
                     cavernSlice.set(localX, localY, localZ, matter);
                     carved++;
@@ -519,7 +524,7 @@ public class IrisCaveCarver3D {
                 int lz1 = lz + 1;
                 int activeColumns = 0;
 
-                int index00 = (lx << 4) | lz;
+                int index00 = PowerOfTwoCoordinates.packLocal16(lx, lz);
                 if (!Double.isNaN(passThreshold[index00])) {
                     tileIndices[activeColumns] = index00;
                     tileLocalX[activeColumns] = lx;
@@ -528,7 +533,7 @@ public class IrisCaveCarver3D {
                     activeColumns++;
                 }
 
-                int index01 = (lx << 4) | lz1;
+                int index01 = PowerOfTwoCoordinates.packLocal16(lx, lz1);
                 if (!Double.isNaN(passThreshold[index01])) {
                     tileIndices[activeColumns] = index01;
                     tileLocalX[activeColumns] = lx;
@@ -537,7 +542,7 @@ public class IrisCaveCarver3D {
                     activeColumns++;
                 }
 
-                int index10 = (lx1 << 4) | lz;
+                int index10 = PowerOfTwoCoordinates.packLocal16(lx1, lz);
                 if (!Double.isNaN(passThreshold[index10])) {
                     tileIndices[activeColumns] = index10;
                     tileLocalX[activeColumns] = lx1;
@@ -546,7 +551,7 @@ public class IrisCaveCarver3D {
                     activeColumns++;
                 }
 
-                int index11 = (lx1 << 4) | lz1;
+                int index11 = PowerOfTwoCoordinates.packLocal16(lx1, lz1);
                 if (!Double.isNaN(passThreshold[index11])) {
                     tileIndices[activeColumns] = index11;
                     tileLocalX[activeColumns] = lx1;
@@ -574,7 +579,7 @@ public class IrisCaveCarver3D {
                     int stampMaxY = Math.min(maxY, y + 1);
                     for (int yy = y; yy <= stampMaxY; yy++) {
                         MatterCavern matter = matterByY[yy - minY];
-                        MatterSlice<MatterCavern> cavernSlice = resolveCavernSlice(scratch, chunk, yy >> 4);
+                        MatterSlice<MatterCavern> cavernSlice = resolveCavernSlice(scratch, chunk, PowerOfTwoCoordinates.floorDivPow2(yy, 4));
                         int localY = yy & 15;
                         int fadeIndex = yy - minY;
                         for (int columnIndex = 0; columnIndex < activeColumns; columnIndex++) {
@@ -640,7 +645,7 @@ public class IrisCaveCarver3D {
             int x = x0 + lx;
             for (int lz = 0; lz < 16; lz++) {
                 int z = z0 + lz;
-                int index = (lx << 4) | lz;
+                int index = PowerOfTwoCoordinates.packLocal16(lx, lz);
                 double columnWeight = clampedWeights[index];
                 if (columnWeight <= minWeight) {
                     continue;
@@ -669,7 +674,7 @@ public class IrisCaveCarver3D {
                     int carveMaxY = Math.min(columnTopY, y + sampleStep - 1);
                     for (int yy = y; yy <= carveMaxY; yy++) {
                         MatterCavern matter = matterByY[yy - minY];
-                        MatterSlice<MatterCavern> cavernSlice = resolveCavernSlice(scratch, chunk, yy >> 4);
+                        MatterSlice<MatterCavern> cavernSlice = resolveCavernSlice(scratch, chunk, PowerOfTwoCoordinates.floorDivPow2(yy, 4));
                         int localY = yy & 15;
                         if (skipExistingCarved) {
                             if (cavernSlice.get(lx, localY, lz) == null) {
@@ -719,153 +724,234 @@ public class IrisCaveCarver3D {
         return sampleDensityWarpModules(x, y, z);
     }
 
-    private void fillDensityPlane(int x0, int z0, int y, int[] planeColumnIndices, int planeCount, double[] planeDensity) {
+    private void classifyDensityPlane(int x0, int z0, int y, int[] planeColumnIndices, double[] planeThresholdLimit, int planeCount, boolean[] planeCarve) {
         if (!hasWarp) {
             if (!hasModules) {
-                fillDensityPlaneNoWarpNoModules(x0, z0, y, planeColumnIndices, planeCount, planeDensity);
+                classifyDensityPlaneNoWarpNoModules(x0, z0, y, planeColumnIndices, planeThresholdLimit, planeCount, planeCarve);
                 return;
             }
 
-            fillDensityPlaneNoWarpModules(x0, z0, y, planeColumnIndices, planeCount, planeDensity);
+            classifyDensityPlaneNoWarpModules(x0, z0, y, planeColumnIndices, planeThresholdLimit, planeCount, planeCarve);
             return;
         }
 
         if (!hasModules) {
-            fillDensityPlaneWarpOnly(x0, z0, y, planeColumnIndices, planeCount, planeDensity);
+            classifyDensityPlaneWarpOnly(x0, z0, y, planeColumnIndices, planeThresholdLimit, planeCount, planeCarve);
             return;
         }
 
-        fillDensityPlaneWarpModules(x0, z0, y, planeColumnIndices, planeCount, planeDensity);
+        classifyDensityPlaneWarpModules(x0, z0, y, planeColumnIndices, planeThresholdLimit, planeCount, planeCarve);
     }
 
-    private void fillDensityPlaneNoWarpNoModules(int x0, int z0, int y, int[] planeColumnIndices, int planeCount, double[] planeDensity) {
+    private void classifyDensityPlaneNoWarpNoModules(int x0, int z0, int y, int[] planeColumnIndices, double[] planeThresholdLimit, int planeCount, boolean[] planeCarve) {
         CNG localBaseDensity = baseDensity;
         CNG localDetailDensity = detailDensity;
         double localBaseWeight = baseWeight;
         double localDetailWeight = detailWeight;
-        double normalization = inverseNormalization;
+        double detailMin = detailMinContribution;
+        double detailMax = detailMaxContribution;
 
         for (int planeIndex = 0; planeIndex < planeCount; planeIndex++) {
             int columnIndex = planeColumnIndices[planeIndex];
-            int x = x0 + (columnIndex >> 4);
+            int x = x0 + PowerOfTwoCoordinates.unpackLocal16X(columnIndex);
             int z = z0 + (columnIndex & 15);
-            double density = signed(localBaseDensity.noiseFast3D(x, y, z)) * localBaseWeight;
-            density += signed(localDetailDensity.noiseFast3D(x, y, z)) * localDetailWeight;
-            planeDensity[planeIndex] = density * normalization;
-        }
-    }
-
-    private void fillDensityPlaneNoWarpModules(int x0, int z0, int y, int[] planeColumnIndices, int planeCount, double[] planeDensity) {
-        CNG localBaseDensity = baseDensity;
-        CNG localDetailDensity = detailDensity;
-        ModuleState[] localModules = modules;
-        double localBaseWeight = baseWeight;
-        double localDetailWeight = detailWeight;
-        double normalization = inverseNormalization;
-
-        for (int planeIndex = 0; planeIndex < planeCount; planeIndex++) {
-            int columnIndex = planeColumnIndices[planeIndex];
-            int x = x0 + (columnIndex >> 4);
-            int z = z0 + (columnIndex & 15);
-            double density = signed(localBaseDensity.noiseFast3D(x, y, z)) * localBaseWeight;
-            density += signed(localDetailDensity.noiseFast3D(x, y, z)) * localDetailWeight;
-            for (int moduleIndex = 0; moduleIndex < localModules.length; moduleIndex++) {
-                ModuleState module = localModules[moduleIndex];
-                if (y < module.minY || y > module.maxY) {
-                    continue;
-                }
-
-                double moduleDensity = signed(module.density.noiseFast3D(x, y, z)) - module.threshold;
-                if (module.invert) {
-                    moduleDensity = -moduleDensity;
-                }
-
-                density += moduleDensity * module.weight;
+            double thresholdLimit = planeThresholdLimit[planeIndex];
+            double density = localBaseDensity.noiseFastSigned3D(x, y, z) * localBaseWeight;
+            if ((density + detailMin) > thresholdLimit) {
+                planeCarve[planeIndex] = false;
+                continue;
+            }
+            if ((density + detailMax) <= thresholdLimit) {
+                planeCarve[planeIndex] = true;
+                continue;
             }
 
-            planeDensity[planeIndex] = density * normalization;
+            density += localDetailDensity.noiseFastSigned3D(x, y, z) * localDetailWeight;
+            planeCarve[planeIndex] = density <= thresholdLimit;
         }
     }
 
-    private void fillDensityPlaneWarpOnly(int x0, int z0, int y, int[] planeColumnIndices, int planeCount, double[] planeDensity) {
+    private void classifyDensityPlaneNoWarpModules(int x0, int z0, int y, int[] planeColumnIndices, double[] planeThresholdLimit, int planeCount, boolean[] planeCarve) {
+        CNG localBaseDensity = baseDensity;
+        CNG localDetailDensity = detailDensity;
+        Scratch scratch = SCRATCH.get();
+        int activeModuleCount = prepareActiveModules(scratch, y);
+        if (activeModuleCount == 0) {
+            classifyDensityPlaneNoWarpNoModules(x0, z0, y, planeColumnIndices, planeThresholdLimit, planeCount, planeCarve);
+            return;
+        }
+
+        ModuleState[] localModules = scratch.activeModules;
+        double[] remainingMin = scratch.activeModuleRemainingMin;
+        double[] remainingMax = scratch.activeModuleRemainingMax;
+        double localBaseWeight = baseWeight;
+        double localDetailWeight = detailWeight;
+        double detailMin = detailMinContribution;
+        double detailMax = detailMaxContribution;
+
+        for (int planeIndex = 0; planeIndex < planeCount; planeIndex++) {
+            int columnIndex = planeColumnIndices[planeIndex];
+            int x = x0 + PowerOfTwoCoordinates.unpackLocal16X(columnIndex);
+            int z = z0 + (columnIndex & 15);
+            double thresholdLimit = planeThresholdLimit[planeIndex];
+            double density = localBaseDensity.noiseFastSigned3D(x, y, z) * localBaseWeight;
+            if ((density + detailMin + remainingMin[0]) > thresholdLimit) {
+                planeCarve[planeIndex] = false;
+                continue;
+            }
+            if ((density + detailMax + remainingMax[0]) <= thresholdLimit) {
+                planeCarve[planeIndex] = true;
+                continue;
+            }
+
+            density += localDetailDensity.noiseFastSigned3D(x, y, z) * localDetailWeight;
+            if ((density + remainingMin[0]) > thresholdLimit) {
+                planeCarve[planeIndex] = false;
+                continue;
+            }
+            if ((density + remainingMax[0]) <= thresholdLimit) {
+                planeCarve[planeIndex] = true;
+                continue;
+            }
+
+            for (int moduleIndex = 0; moduleIndex < activeModuleCount; moduleIndex++) {
+                ModuleState module = localModules[moduleIndex];
+                density += module.sample(x, y, z);
+                if ((density + remainingMin[moduleIndex + 1]) > thresholdLimit) {
+                    density = Double.POSITIVE_INFINITY;
+                    break;
+                }
+                if ((density + remainingMax[moduleIndex + 1]) <= thresholdLimit) {
+                    density = Double.NEGATIVE_INFINITY;
+                    break;
+                }
+            }
+
+            planeCarve[planeIndex] = density <= thresholdLimit;
+        }
+    }
+
+    private void classifyDensityPlaneWarpOnly(int x0, int z0, int y, int[] planeColumnIndices, double[] planeThresholdLimit, int planeCount, boolean[] planeCarve) {
         CNG localBaseDensity = baseDensity;
         CNG localDetailDensity = detailDensity;
         CNG localWarpDensity = warpDensity;
         double localBaseWeight = baseWeight;
         double localDetailWeight = detailWeight;
         double localWarpStrength = warpStrength;
-        double normalization = inverseNormalization;
+        double detailMin = detailMinContribution;
+        double detailMax = detailMaxContribution;
 
         for (int planeIndex = 0; planeIndex < planeCount; planeIndex++) {
             int columnIndex = planeColumnIndices[planeIndex];
-            double x = x0 + (columnIndex >> 4);
+            double x = x0 + PowerOfTwoCoordinates.unpackLocal16X(columnIndex);
             double z = z0 + (columnIndex & 15);
-            double warpA = signed(localWarpDensity.noiseFast3D(x, y, z));
-            double warpB = signed(localWarpDensity.noiseFast3D(x + 31.37D, y - 17.21D, z + 23.91D));
+            double thresholdLimit = planeThresholdLimit[planeIndex];
+            double warpA = localWarpDensity.noiseFastSigned3D(x, y, z);
+            double warpB = localWarpDensity.noiseFastSigned3D(x + 31.37D, y - 17.21D, z + 23.91D);
             double warpedX = x + (warpA * localWarpStrength);
             double warpedY = y + (warpB * localWarpStrength);
             double warpedZ = z + ((warpA - warpB) * 0.5D * localWarpStrength);
-            double density = signed(localBaseDensity.noiseFast3D(warpedX, warpedY, warpedZ)) * localBaseWeight;
-            density += signed(localDetailDensity.noiseFast3D(warpedX, warpedY, warpedZ)) * localDetailWeight;
-            planeDensity[planeIndex] = density * normalization;
+            double density = localBaseDensity.noiseFastSigned3D(warpedX, warpedY, warpedZ) * localBaseWeight;
+            if ((density + detailMin) > thresholdLimit) {
+                planeCarve[planeIndex] = false;
+                continue;
+            }
+            if ((density + detailMax) <= thresholdLimit) {
+                planeCarve[planeIndex] = true;
+                continue;
+            }
+
+            density += localDetailDensity.noiseFastSigned3D(warpedX, warpedY, warpedZ) * localDetailWeight;
+            planeCarve[planeIndex] = density <= thresholdLimit;
         }
     }
 
-    private void fillDensityPlaneWarpModules(int x0, int z0, int y, int[] planeColumnIndices, int planeCount, double[] planeDensity) {
+    private void classifyDensityPlaneWarpModules(int x0, int z0, int y, int[] planeColumnIndices, double[] planeThresholdLimit, int planeCount, boolean[] planeCarve) {
         CNG localBaseDensity = baseDensity;
         CNG localDetailDensity = detailDensity;
         CNG localWarpDensity = warpDensity;
-        ModuleState[] localModules = modules;
+        Scratch scratch = SCRATCH.get();
+        int activeModuleCount = prepareActiveModules(scratch, y);
+        if (activeModuleCount == 0) {
+            classifyDensityPlaneWarpOnly(x0, z0, y, planeColumnIndices, planeThresholdLimit, planeCount, planeCarve);
+            return;
+        }
+
+        ModuleState[] localModules = scratch.activeModules;
+        double[] remainingMin = scratch.activeModuleRemainingMin;
+        double[] remainingMax = scratch.activeModuleRemainingMax;
         double localBaseWeight = baseWeight;
         double localDetailWeight = detailWeight;
         double localWarpStrength = warpStrength;
-        double normalization = inverseNormalization;
+        double detailMin = detailMinContribution;
+        double detailMax = detailMaxContribution;
 
         for (int planeIndex = 0; planeIndex < planeCount; planeIndex++) {
             int columnIndex = planeColumnIndices[planeIndex];
-            double x = x0 + (columnIndex >> 4);
+            double x = x0 + PowerOfTwoCoordinates.unpackLocal16X(columnIndex);
             double z = z0 + (columnIndex & 15);
-            double warpA = signed(localWarpDensity.noiseFast3D(x, y, z));
-            double warpB = signed(localWarpDensity.noiseFast3D(x + 31.37D, y - 17.21D, z + 23.91D));
+            double thresholdLimit = planeThresholdLimit[planeIndex];
+            double warpA = localWarpDensity.noiseFastSigned3D(x, y, z);
+            double warpB = localWarpDensity.noiseFastSigned3D(x + 31.37D, y - 17.21D, z + 23.91D);
             double warpedX = x + (warpA * localWarpStrength);
             double warpedY = y + (warpB * localWarpStrength);
             double warpedZ = z + ((warpA - warpB) * 0.5D * localWarpStrength);
-            double density = signed(localBaseDensity.noiseFast3D(warpedX, warpedY, warpedZ)) * localBaseWeight;
-            density += signed(localDetailDensity.noiseFast3D(warpedX, warpedY, warpedZ)) * localDetailWeight;
-            for (int moduleIndex = 0; moduleIndex < localModules.length; moduleIndex++) {
-                ModuleState module = localModules[moduleIndex];
-                if (y < module.minY || y > module.maxY) {
-                    continue;
-                }
-
-                double moduleDensity = signed(module.density.noiseFast3D(warpedX, warpedY, warpedZ)) - module.threshold;
-                if (module.invert) {
-                    moduleDensity = -moduleDensity;
-                }
-
-                density += moduleDensity * module.weight;
+            double density = localBaseDensity.noiseFastSigned3D(warpedX, warpedY, warpedZ) * localBaseWeight;
+            if ((density + detailMin + remainingMin[0]) > thresholdLimit) {
+                planeCarve[planeIndex] = false;
+                continue;
+            }
+            if ((density + detailMax + remainingMax[0]) <= thresholdLimit) {
+                planeCarve[planeIndex] = true;
+                continue;
             }
 
-            planeDensity[planeIndex] = density * normalization;
+            density += localDetailDensity.noiseFastSigned3D(warpedX, warpedY, warpedZ) * localDetailWeight;
+            if ((density + remainingMin[0]) > thresholdLimit) {
+                planeCarve[planeIndex] = false;
+                continue;
+            }
+            if ((density + remainingMax[0]) <= thresholdLimit) {
+                planeCarve[planeIndex] = true;
+                continue;
+            }
+
+            for (int moduleIndex = 0; moduleIndex < activeModuleCount; moduleIndex++) {
+                ModuleState module = localModules[moduleIndex];
+                density += module.sample(warpedX, warpedY, warpedZ);
+                if ((density + remainingMin[moduleIndex + 1]) > thresholdLimit) {
+                    density = Double.POSITIVE_INFINITY;
+                    break;
+                }
+                if ((density + remainingMax[moduleIndex + 1]) <= thresholdLimit) {
+                    density = Double.NEGATIVE_INFINITY;
+                    break;
+                }
+            }
+
+            planeCarve[planeIndex] = density <= thresholdLimit;
         }
     }
 
     private double sampleDensityNoWarpNoModules(int x, int y, int z) {
-        double density = signed(baseDensity.noiseFast3D(x, y, z)) * baseWeight;
-        density += signed(detailDensity.noiseFast3D(x, y, z)) * detailWeight;
+        double density = baseDensity.noiseFastSigned3D(x, y, z) * baseWeight;
+        density += detailDensity.noiseFastSigned3D(x, y, z) * detailWeight;
         return density * inverseNormalization;
     }
 
     private double sampleDensityNoWarpModules(int x, int y, int z) {
-        double density = signed(baseDensity.noiseFast3D(x, y, z)) * baseWeight;
-        density += signed(detailDensity.noiseFast3D(x, y, z)) * detailWeight;
-        for (int moduleIndex = 0; moduleIndex < modules.length; moduleIndex++) {
-            ModuleState module = modules[moduleIndex];
-            if (y < module.minY || y > module.maxY) {
-                continue;
-            }
+        Scratch scratch = SCRATCH.get();
+        int activeModuleCount = prepareActiveModules(scratch, y);
+        if (activeModuleCount == 0) {
+            return sampleDensityNoWarpNoModules(x, y, z);
+        }
 
-            double moduleDensity = signed(module.density.noiseFast3D(x, y, z)) - module.threshold;
+        ModuleState[] localModules = scratch.activeModules;
+        double density = baseDensity.noiseFastSigned3D(x, y, z) * baseWeight;
+        density += detailDensity.noiseFastSigned3D(x, y, z) * detailWeight;
+        for (int moduleIndex = 0; moduleIndex < activeModuleCount; moduleIndex++) {
+            ModuleState module = localModules[moduleIndex];
+            double moduleDensity = module.density.noiseFastSigned3D(x, y, z) - module.threshold;
             if (module.invert) {
                 moduleDensity = -moduleDensity;
             }
@@ -877,31 +963,34 @@ public class IrisCaveCarver3D {
     }
 
     private double sampleDensityWarpOnly(int x, int y, int z) {
-        double warpA = signed(warpDensity.noiseFast3D(x, y, z));
-        double warpB = signed(warpDensity.noiseFast3D(x + 31.37D, y - 17.21D, z + 23.91D));
+        double warpA = warpDensity.noiseFastSigned3D(x, y, z);
+        double warpB = warpDensity.noiseFastSigned3D(x + 31.37D, y - 17.21D, z + 23.91D);
         double warpedX = x + (warpA * warpStrength);
         double warpedY = y + (warpB * warpStrength);
         double warpedZ = z + ((warpA - warpB) * 0.5D * warpStrength);
-        double density = signed(baseDensity.noiseFast3D(warpedX, warpedY, warpedZ)) * baseWeight;
-        density += signed(detailDensity.noiseFast3D(warpedX, warpedY, warpedZ)) * detailWeight;
+        double density = baseDensity.noiseFastSigned3D(warpedX, warpedY, warpedZ) * baseWeight;
+        density += detailDensity.noiseFastSigned3D(warpedX, warpedY, warpedZ) * detailWeight;
         return density * inverseNormalization;
     }
 
     private double sampleDensityWarpModules(int x, int y, int z) {
-        double warpA = signed(warpDensity.noiseFast3D(x, y, z));
-        double warpB = signed(warpDensity.noiseFast3D(x + 31.37D, y - 17.21D, z + 23.91D));
+        Scratch scratch = SCRATCH.get();
+        int activeModuleCount = prepareActiveModules(scratch, y);
+        if (activeModuleCount == 0) {
+            return sampleDensityWarpOnly(x, y, z);
+        }
+
+        ModuleState[] localModules = scratch.activeModules;
+        double warpA = warpDensity.noiseFastSigned3D(x, y, z);
+        double warpB = warpDensity.noiseFastSigned3D(x + 31.37D, y - 17.21D, z + 23.91D);
         double warpedX = x + (warpA * warpStrength);
         double warpedY = y + (warpB * warpStrength);
         double warpedZ = z + ((warpA - warpB) * 0.5D * warpStrength);
-        double density = signed(baseDensity.noiseFast3D(warpedX, warpedY, warpedZ)) * baseWeight;
-        density += signed(detailDensity.noiseFast3D(warpedX, warpedY, warpedZ)) * detailWeight;
-        for (int moduleIndex = 0; moduleIndex < modules.length; moduleIndex++) {
-            ModuleState module = modules[moduleIndex];
-            if (y < module.minY || y > module.maxY) {
-                continue;
-            }
-
-            double moduleDensity = signed(module.density.noiseFast3D(warpedX, warpedY, warpedZ)) - module.threshold;
+        double density = baseDensity.noiseFastSigned3D(warpedX, warpedY, warpedZ) * baseWeight;
+        density += detailDensity.noiseFastSigned3D(warpedX, warpedY, warpedZ) * detailWeight;
+        for (int moduleIndex = 0; moduleIndex < activeModuleCount; moduleIndex++) {
+            ModuleState module = localModules[moduleIndex];
+            double moduleDensity = module.density.noiseFastSigned3D(warpedX, warpedY, warpedZ) - module.threshold;
             if (module.invert) {
                 moduleDensity = -moduleDensity;
             }
@@ -912,6 +1001,44 @@ public class IrisCaveCarver3D {
         return density * inverseNormalization;
     }
 
+    private int prepareActiveModules(Scratch scratch, int y) {
+        ModuleState[] configuredModules = modules;
+        int configuredCount = configuredModules.length;
+        if (configuredCount == 0) {
+            return 0;
+        }
+
+        if (scratch.activeModules.length < configuredCount) {
+            scratch.activeModules = new ModuleState[configuredCount];
+        }
+
+        int activeCount = 0;
+        for (int moduleIndex = 0; moduleIndex < configuredCount; moduleIndex++) {
+            ModuleState module = configuredModules[moduleIndex];
+            if (y < module.minY || y > module.maxY) {
+                continue;
+            }
+
+            scratch.activeModules[activeCount] = module;
+            activeCount++;
+        }
+
+        if (scratch.activeModuleRemainingMin.length < activeCount + 1) {
+            scratch.activeModuleRemainingMin = new double[activeCount + 1];
+            scratch.activeModuleRemainingMax = new double[activeCount + 1];
+        }
+
+        scratch.activeModuleRemainingMin[activeCount] = 0D;
+        scratch.activeModuleRemainingMax[activeCount] = 0D;
+        for (int moduleIndex = activeCount - 1; moduleIndex >= 0; moduleIndex--) {
+            ModuleState module = scratch.activeModules[moduleIndex];
+            scratch.activeModuleRemainingMin[moduleIndex] = scratch.activeModuleRemainingMin[moduleIndex + 1] + module.minContribution;
+            scratch.activeModuleRemainingMax[moduleIndex] = scratch.activeModuleRemainingMax[moduleIndex + 1] + module.maxContribution;
+        }
+
+        return activeCount;
+    }
+
     private MatterSlice<MatterCavern> resolveCavernSlice(Scratch scratch, MantleChunk<Matter> chunk, int sectionIndex) {
         @SuppressWarnings("unchecked")
         MatterSlice<MatterCavern> cachedSlice = (MatterSlice<MatterCavern>) scratch.sectionSlices[sectionIndex];
@@ -964,8 +1091,8 @@ public class IrisCaveCarver3D {
     }
 
     private void prepareSectionCaches(Scratch scratch, int minY, int maxY) {
-        int minSection = Math.max(0, minY >> 4);
-        int maxSection = Math.max(minSection, maxY >> 4);
+        int minSection = Math.max(0, PowerOfTwoCoordinates.floorDivPow2(minY, 4));
+        int maxSection = Math.max(minSection, PowerOfTwoCoordinates.floorDivPow2(maxY, 4));
         int requiredSections = maxSection + 1;
         if (scratch.sectionMatter.length < requiredSections) {
             scratch.sectionMatter = new Matter[requiredSections];
@@ -1038,6 +1165,8 @@ public class IrisCaveCarver3D {
         private final double weight;
         private final double threshold;
         private final boolean invert;
+        private final double minContribution;
+        private final double maxContribution;
 
         private ModuleState(IrisCaveFieldModule module, CNG density) {
             IrisRange range = module.getVerticalRange();
@@ -1047,6 +1176,20 @@ public class IrisCaveCarver3D {
             this.weight = module.getWeight();
             this.threshold = module.getThreshold();
             this.invert = module.isInvert();
+            double rawMin = invert ? threshold - 1D : -1D - threshold;
+            double rawMax = invert ? threshold + 1D : 1D - threshold;
+            this.minContribution = rawMin * weight;
+            this.maxContribution = rawMax * weight;
+        }
+
+        private double sample(double x, int y, double z) {
+            double sampled = density.noiseFastSigned3D(x, y, z);
+            return invert ? (threshold - sampled) * weight : (sampled - threshold) * weight;
+        }
+
+        private double sample(double x, double y, double z) {
+            double sampled = density.noiseFastSigned3D(x, y, z);
+            return invert ? (threshold - sampled) * weight : (sampled - threshold) * weight;
         }
     }
 
@@ -1061,11 +1204,15 @@ public class IrisCaveCarver3D {
         private final int[] activeColumnIndices = new int[256];
         private final int[] activeColumnTopY = new int[256];
         private final int[] planeColumnIndices = new int[256];
-        private final double[] planeDensity = new double[256];
+        private final double[] planeThresholdLimit = new double[256];
+        private final boolean[] planeCarve = new boolean[256];
         private final int[] tileIndices = new int[4];
         private final int[] tileLocalX = new int[4];
         private final int[] tileLocalZ = new int[4];
         private final int[] tileTopY = new int[4];
+        private ModuleState[] activeModules = new ModuleState[0];
+        private double[] activeModuleRemainingMin = new double[0];
+        private double[] activeModuleRemainingMax = new double[0];
         private double[] verticalEdgeFade = new double[0];
         private MatterCavern[] matterByY = new MatterCavern[0];
         private Matter[] sectionMatter = new Matter[0];

core/src/main/java/art/arcane/iris/engine/mantle/components/MantleCarvingComponent.java

@@ -33,6 +33,7 @@ import art.arcane.iris.engine.object.IrisRange;
 import art.arcane.iris.util.project.context.ChunkContext;
 import art.arcane.volmlib.util.documentation.ChunkCoordinates;
 import art.arcane.volmlib.util.mantle.flag.ReservedFlag;
+import art.arcane.volmlib.util.math.PowerOfTwoCoordinates;
 import art.arcane.volmlib.util.scheduling.PrecisionStopwatch;
 import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
 
@@ -159,7 +160,7 @@ public class MantleCarvingComponent extends IrisMantleComponent {
                     continue;
                 }
 
-                int columnIndex = (localX << 4) | localZ;
+                int columnIndex = PowerOfTwoCoordinates.packLocal16(localX, localZ);
                 double dominantWeight = clampWeight(dominantKernelWeight / totalKernelWeight);
                 double[] weights = columnProfileWeights.get(dominantProfile);
                 if (weights == null) {
@@ -255,21 +256,21 @@ public class MantleCarvingComponent extends IrisMantleComponent {
     }
 
     private void buildDimensionColumnPlan(IrisDimensionCarvingEntry[] columnPlan, int chunkX, int chunkZ, IrisDimensionCarvingEntry entry, IrisDimensionCarvingResolver.State resolverState) {
-        int baseX = chunkX << 4;
-        int baseZ = chunkZ << 4;
+        int baseX = PowerOfTwoCoordinates.chunkToBlock(chunkX);
+        int baseZ = PowerOfTwoCoordinates.chunkToBlock(chunkZ);
         for (int localX = 0; localX < CHUNK_SIZE; localX++) {
             int worldX = baseX + localX;
             for (int localZ = 0; localZ < CHUNK_SIZE; localZ++) {
                 int worldZ = baseZ + localZ;
-                int columnIndex = (localX << 4) | localZ;
+                int columnIndex = PowerOfTwoCoordinates.packLocal16(localX, localZ);
                 columnPlan[columnIndex] = IrisDimensionCarvingResolver.resolveFromRoot(getEngineMantle().getEngine(), entry, worldX, worldZ, resolverState);
             }
         }
     }
 
     private void fillProfileField(IrisCaveProfile[] profileField, int chunkX, int chunkZ, IrisComplex complex, IrisDimensionCarvingResolver.State resolverState, Long2ObjectOpenHashMap<IrisBiome> caveBiomeCache) {
-        int startX = (chunkX << 4) - BLEND_RADIUS;
-        int startZ = (chunkZ << 4) - BLEND_RADIUS;
+        int startX = PowerOfTwoCoordinates.chunkToBlock(chunkX) - BLEND_RADIUS;
+        int startZ = PowerOfTwoCoordinates.chunkToBlock(chunkZ) - BLEND_RADIUS;
 
         for (int fieldX = 0; fieldX < FIELD_SIZE; fieldX++) {
             int worldX = startX + fieldX;
@@ -356,8 +357,8 @@ public class MantleCarvingComponent extends IrisMantleComponent {
 
     private int[] prepareChunkSurfaceHeights(int chunkX, int chunkZ, ChunkContext context, int[] scratch) {
         int[] surfaceHeights = scratch;
-        int baseX = chunkX << 4;
-        int baseZ = chunkZ << 4;
+        int baseX = PowerOfTwoCoordinates.chunkToBlock(chunkX);
+        int baseZ = PowerOfTwoCoordinates.chunkToBlock(chunkZ);
         boolean useContextHeight = context != null
                 && context.getHeight() != null
                 && context.getX() == baseX
@@ -366,7 +367,7 @@ public class MantleCarvingComponent extends IrisMantleComponent {
             int worldX = baseX + localX;
             for (int localZ = 0; localZ < CHUNK_SIZE; localZ++) {
                 int worldZ = baseZ + localZ;
-                int columnIndex = (localX << 4) | localZ;
+                int columnIndex = PowerOfTwoCoordinates.packLocal16(localX, localZ);
                 if (useContextHeight) {
                     Double cachedHeight = context.getHeight().get(localX, localZ);
                     if (cachedHeight != null) {

core/src/main/java/art/arcane/iris/engine/modifier/IrisCarveModifier.java

@@ -35,6 +35,7 @@ import art.arcane.volmlib.util.mantle.runtime.Mantle;
 import art.arcane.volmlib.util.mantle.runtime.MantleChunk;
 import art.arcane.volmlib.util.math.BlockPosition;
 import art.arcane.volmlib.util.math.M;
+import art.arcane.volmlib.util.math.PowerOfTwoCoordinates;
 import art.arcane.volmlib.util.math.RNG;
 import art.arcane.volmlib.util.matter.Matter;
 import art.arcane.volmlib.util.matter.MatterCavern;
@@ -89,7 +90,7 @@ public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
 
                 int rx = xx & 15;
                 int rz = zz & 15;
-                int columnIndex = (rx << 4) | rz;
+                int columnIndex = PowerOfTwoCoordinates.packLocal16(rx, rz);
                 BlockData current = output.get(rx, yy, rz);
 
                 if (B.isFluid(current)) {
@@ -135,8 +136,8 @@ public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
             PrecisionStopwatch applyStopwatch = PrecisionStopwatch.start();
             try {
                 walls.forEach((rx, yy, rz, cavern) -> {
-                    int worldX = rx + (x << 4);
-                    int worldZ = rz + (z << 4);
+                    int worldX = rx + PowerOfTwoCoordinates.chunkToBlock(x);
+                    int worldZ = rz + PowerOfTwoCoordinates.chunkToBlock(z);
                     String customBiome = cavern.getCustomBiome();
                     IrisBiome biome = customBiome.isEmpty()
                             ? resolveCaveBiome(caveBiomeCache, worldX, yy, worldZ, resolverState)
@@ -184,10 +185,10 @@ public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
             return;
         }
 
-        int rx = columnIndex >> 4;
+        int rx = PowerOfTwoCoordinates.unpackLocal16X(columnIndex);
         int rz = columnIndex & 15;
-        int worldX = rx + (chunkX << 4);
-        int worldZ = rz + (chunkZ << 4);
+        int worldX = rx + PowerOfTwoCoordinates.chunkToBlock(chunkX);
+        int worldZ = rz + PowerOfTwoCoordinates.chunkToBlock(chunkZ);
         CaveZone zone = new CaveZone();
         zone.setFloor(firstHeight);
         int buf = firstHeight - 1;
@@ -239,7 +240,7 @@ public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
         }
 
         for (int i = zone.floor; i <= zone.ceiling; i++) {
-            MatterCavern cavernData = (MatterCavern) mc.getOrCreate(i >> 4).slice(MatterCavern.class)
+            MatterCavern cavernData = (MatterCavern) mc.getOrCreate(PowerOfTwoCoordinates.floorDivPow2(i, 4)).slice(MatterCavern.class)
                     .get(rx, i & 15, rz);
 
             if (cavernData != null && !cavernData.getCustomBiome().isEmpty()) {
@@ -447,11 +448,11 @@ public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
         }
 
         private int pack(int x, int y, int z) {
-            return (y << 8) | ((x & 15) << 4) | (z & 15);
+            return (y << 8) | PowerOfTwoCoordinates.packLocal16(x & 15, z & 15);
         }
 
         private int unpackX(int key) {
-            return (key >> 4) & 15;
+            return PowerOfTwoCoordinates.unpackLocal16X(key & 255);
         }
 
         private int unpackY(int key) {
@@ -459,7 +460,7 @@ public class IrisCarveModifier extends EngineAssignedModifier<BlockData> {
         }
 
         private int unpackZ(int key) {
-            return key & 15;
+            return PowerOfTwoCoordinates.unpackLocal16Z(key);
         }
 
         private int mix(int value) {

core/src/main/java/art/arcane/iris/engine/object/IrisBiome.java

@@ -179,14 +179,17 @@ public class IrisBiome extends IrisRegistrant implements IRare {
         if (ores.isEmpty()) {
             return null;
         }
-        BlockData b = null;
-        for (IrisOreGenerator i : ores) {
-            if (i.isGenerateSurface() != surface)
+        KList<IrisOreGenerator> localOres = ores;
+        int oreCount = localOres.size();
+        for (int oreIndex = 0; oreIndex < oreCount; oreIndex++) {
+            IrisOreGenerator oreGenerator = localOres.get(oreIndex);
+            if (oreGenerator.isGenerateSurface() != surface) {
                 continue;
+            }
 
-            b = i.generate(x, y, z, rng, data);
-            if (b != null) {
-                return b;
+            BlockData ore = oreGenerator.generate(x, y, z, rng, data);
+            if (ore != null) {
+                return ore;
             }
         }
         return null;

core/src/main/java/art/arcane/iris/engine/object/IrisBiomePaletteLayer.java

@@ -77,7 +77,10 @@ public class IrisBiomePaletteLayer {
             return getBlockData(data).get(0);
         }
 
-        return getLayerGenerator(rng, data).fit(getBlockData(data), x / zoom, y / zoom, z / zoom);
+        double scaledX = x / zoom;
+        double scaledY = y / zoom;
+        double scaledZ = z / zoom;
+        return getLayerGenerator(rng, data).fit(getBlockData(data), scaledX, scaledY, scaledZ);
     }
 
     public CNG getLayerGenerator(RNG rng, IrisData data) {

core/src/main/java/art/arcane/iris/engine/object/IrisDimension.java

@@ -290,22 +290,25 @@ public class IrisDimension extends IrisRegistrant {
         carvingEntryIndex.reset();
     }
 
-    public BlockData generateOres(int x, int y, int z, RNG rng, IrisData data, boolean surface) {
-        if (ores.isEmpty()) {
-            return null;
-        }
-        BlockData b = null;
-        for (IrisOreGenerator i : ores) {
-            if (i.isGenerateSurface() != surface)
-                continue;
-
-            b = i.generate(x, y, z, rng, data);
-            if (b != null) {
-                return b;
-            }
-        }
-        return null;
-    }
+    public BlockData generateOres(int x, int y, int z, RNG rng, IrisData data, boolean surface) {
+        if (ores.isEmpty()) {
+            return null;
+        }
+        KList<IrisOreGenerator> localOres = ores;
+        int oreCount = localOres.size();
+        for (int oreIndex = 0; oreIndex < oreCount; oreIndex++) {
+            IrisOreGenerator oreGenerator = localOres.get(oreIndex);
+            if (oreGenerator.isGenerateSurface() != surface) {
+                continue;
+            }
+
+            BlockData ore = oreGenerator.generate(x, y, z, rng, data);
+            if (ore != null) {
+                return ore;
+            }
+        }
+        return null;
+    }
 
     public int getFluidHeight() {
         return fluidHeight - (int) dimensionHeight.getMin();

core/src/main/java/art/arcane/iris/engine/object/IrisGenerator.java

@@ -212,21 +212,23 @@ public class IrisGenerator extends IrisRegistrant {
         int hc = (int) ((cliffHeightMin * 10) + 10 + cliffHeightMax * getSeed() + offsetX + offsetZ);
         double h = multiplicitive ? 1 : 0;
         double tp = 0;
+        double sampleX = (rx + offsetX) / zoom;
+        double sampleZ = (rz + offsetZ) / zoom;
 
         if (composite.size() == 1) {
             if (multiplicitive) {
-                h *= composite.get(0).getNoise(getSeed() + superSeed + hc, (rx + offsetX) / zoom, (rz + offsetZ) / zoom, getLoader());
+                h *= composite.get(0).getNoise(getSeed() + superSeed + hc, sampleX, sampleZ, getLoader());
             } else {
                 tp += composite.get(0).getOpacity();
-                h += composite.get(0).getNoise(getSeed() + superSeed + hc, (rx + offsetX) / zoom, (rz + offsetZ) / zoom, getLoader());
+                h += composite.get(0).getNoise(getSeed() + superSeed + hc, sampleX, sampleZ, getLoader());
             }
         } else {
             for (IrisNoiseGenerator i : composite) {
                 if (multiplicitive) {
-                    h *= i.getNoise(getSeed() + superSeed + hc, (rx + offsetX) / zoom, (rz + offsetZ) / zoom, getLoader());
+                    h *= i.getNoise(getSeed() + superSeed + hc, sampleX, sampleZ, getLoader());
                 } else {
                     tp += i.getOpacity();
-                    h += i.getNoise(getSeed() + superSeed + hc, (rx + offsetX) / zoom, (rz + offsetZ) / zoom, getLoader());
+                    h += i.getNoise(getSeed() + superSeed + hc, sampleX, sampleZ, getLoader());
                 }
             }
         }
@@ -245,7 +247,9 @@ public class IrisGenerator extends IrisRegistrant {
 
     public double cell(double rx, double rz, double v, double superSeed) {
         getCellGenerator(getSeed() + 46222).setShuffle(getCellFractureShuffle());
-        return getCellGenerator(getSeed() + 46222).getDistance(rx / getCellFractureZoom(), rz / getCellFractureZoom()) > getCellPercentSize() ? (v * getCellFractureHeight()) : v;
+        double fractureX = rx / getCellFractureZoom();
+        double fractureZ = rz / getCellFractureZoom();
+        return getCellGenerator(getSeed() + 46222).getDistance(fractureX, fractureZ) > getCellPercentSize() ? (v * getCellFractureHeight()) : v;
     }
 
     private boolean hasCellCracks() {
@@ -254,7 +258,9 @@ public class IrisGenerator extends IrisRegistrant {
 
     public double getCliffHeight(double rx, double rz, double superSeed) {
         int hc = (int) ((cliffHeightMin * 10) + 10 + cliffHeightMax * getSeed() + offsetX + offsetZ);
-        double h = cliffHeightGenerator.getNoise((long) (getSeed() + superSeed + hc), (rx + offsetX) / zoom, (rz + offsetZ) / zoom, getLoader());
+        double sampleX = (rx + offsetX) / zoom;
+        double sampleZ = (rz + offsetZ) / zoom;
+        double h = cliffHeightGenerator.getNoise((long) (getSeed() + superSeed + hc), sampleX, sampleZ, getLoader());
         return IrisInterpolation.lerp(cliffHeightMin, cliffHeightMax, h);
     }
 

core/src/main/java/art/arcane/iris/engine/object/IrisGeneratorStyle.java

@@ -33,6 +33,7 @@ import lombok.experimental.Accessors;
 
 import java.io.File;
 import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
 
 @Snippet("style")
 @Accessors(chain = true)
@@ -41,6 +42,7 @@ import java.util.Objects;
 @Desc("A gen style")
 @Data
 public class IrisGeneratorStyle {
+    private static final ConcurrentHashMap<String, String> ACTIVE_CACHE_KEYS = new ConcurrentHashMap<>();
     private final transient AtomicCache<CNG> cng = new AtomicCache<>();
     @Desc("The chance is 1 in CHANCE per interval")
     private NoiseStyle style = NoiseStyle.FLAT;
@@ -127,6 +129,11 @@ public class IrisGeneratorStyle {
 
     private void clearStaleCacheEntries(IrisData data, String prefix, String key) {
         File cacheFolder = new File(data.getDataFolder(), ".cache");
+        String cacheFolderKey = cacheFolder.getAbsolutePath() + File.separator + prefix;
+        String previousKey = ACTIVE_CACHE_KEYS.put(cacheFolderKey, key);
+        if (key.equals(previousKey)) {
+            return;
+        }
         File[] files = cacheFolder.listFiles((dir, name) -> name.endsWith(".cnm") && name.startsWith(prefix));
         if (files == null) {
             return;

core/src/main/java/art/arcane/iris/engine/object/IrisMaterialPalette.java

@@ -61,7 +61,10 @@ public class IrisMaterialPalette {
             return getBlockData(rdata).get(0);
         }
 
-        return getLayerGenerator(rng, rdata).fit(getBlockData(rdata), x / zoom, y / zoom, z / zoom);
+        double scaledX = x / zoom;
+        double scaledY = y / zoom;
+        double scaledZ = z / zoom;
+        return getLayerGenerator(rng, rdata).fit(getBlockData(rdata), scaledX, scaledY, scaledZ);
     }
 
     public Optional<TileData> getTile(RNG rng, double x, double y, double z, IrisData rdata) {

core/src/main/java/art/arcane/iris/engine/object/IrisNoiseGenerator.java

@@ -22,8 +22,8 @@ import art.arcane.iris.core.loader.IrisData;
 import art.arcane.iris.engine.data.cache.AtomicCache;
 import art.arcane.iris.engine.object.annotations.*;
 import art.arcane.volmlib.util.collection.KList;
-import art.arcane.iris.util.project.interpolation.IrisInterpolation;
 import art.arcane.volmlib.util.math.RNG;
+import art.arcane.iris.util.project.interpolation.IrisInterpolation;
 import art.arcane.iris.util.project.noise.CNG;
 import lombok.AllArgsConstructor;
 import lombok.Data;
@@ -100,14 +100,17 @@ public class IrisNoiseGenerator {
 
         for (IrisNoiseGenerator i : fracture) {
             if (i.isEnabled()) {
-                x += i.getNoise(superSeed + seed + g, xv, zv, data) - (i.getOpacity() / 2D);
-                z += i.getNoise(superSeed + seed + g, zv, xv, data) - (i.getOpacity() / 2D);
+                double fractureOffset = i.getOpacity() / 2D;
+                x += i.getNoise(superSeed + seed + g, xv, zv, data) - fractureOffset;
+                z += i.getNoise(superSeed + seed + g, zv, xv, data) - fractureOffset;
             }
             g += 819;
         }
 
         CNG cng = getGenerator(superSeed, data);
-        double n = cng.noiseFast2D((x / zoom) + offsetX, (z / zoom) + offsetZ) * opacity;
+        double sampleX = (x / zoom) + offsetX;
+        double sampleZ = (z / zoom) + offsetZ;
+        double n = cng.noiseFast2D(sampleX, sampleZ) * opacity;
         n = negative ? (-n + opacity) : n;
         n = (exponent != 1 ? n < 0 ? -Math.pow(-n, exponent) : Math.pow(n, exponent) : n) + offsetY;
         n = parametric ? IrisInterpolation.parametric(n, 1) : n;

core/src/main/java/art/arcane/iris/engine/object/IrisRegion.java

@@ -155,14 +155,17 @@ public class IrisRegion extends IrisRegistrant implements IRare {
         if (ores.isEmpty()) {
             return null;
         }
-        BlockData b = null;
-        for (IrisOreGenerator i : ores) {
-            if (i.isGenerateSurface() != surface)
+        KList<IrisOreGenerator> localOres = ores;
+        int oreCount = localOres.size();
+        for (int oreIndex = 0; oreIndex < oreCount; oreIndex++) {
+            IrisOreGenerator oreGenerator = localOres.get(oreIndex);
+            if (oreGenerator.isGenerateSurface() != surface) {
                 continue;
+            }
 
-            b = i.generate(x, y, z, rng, data);
-            if (b != null) {
-                return b;
+            BlockData ore = oreGenerator.generate(x, y, z, rng, data);
+            if (ore != null) {
+                return ore;
             }
         }
         return null;

core/src/main/java/art/arcane/iris/engine/platform/BukkitChunkGenerator.java

@@ -21,6 +21,7 @@ package art.arcane.iris.engine.platform;
 import art.arcane.iris.Iris;
 import art.arcane.iris.core.IrisSettings;
 import art.arcane.iris.core.IrisWorlds;
+import art.arcane.iris.core.gui.PregeneratorJob;
 import art.arcane.iris.core.loader.IrisData;
 import art.arcane.iris.core.nms.INMS;
 import art.arcane.iris.core.service.StudioSVC;
@@ -81,6 +82,8 @@ import java.util.concurrent.locks.ReentrantLock;
 @Data
 public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChunkGenerator, Listener {
     private static final int LOAD_LOCKS = Runtime.getRuntime().availableProcessors() * 4;
+    private static final long HOTLOAD_LOOP_DELAY_MS = 250L;
+    private static final long HOTLOAD_MAINTENANCE_DELAY_MS = 4000L;
     private final Semaphore loadLock;
     private final IrisWorld world;
     private final File dataLocation;
@@ -563,11 +566,15 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
             this.hotloader = studio ? new Looper() {
                 @Override
                 protected long loop() {
+                    if (shouldThrottleHotload()) {
+                        return HOTLOAD_MAINTENANCE_DELAY_MS;
+                    }
+
                     if (hotloadChecker.flip()) {
                         folder.check();
                     }
 
-                    return 250;
+                    return HOTLOAD_LOOP_DELAY_MS;
                 }
             } : null;
 
@@ -735,10 +742,24 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
             return true;
         }
 
+        return isMaintenanceActive();
+    }
+
+    private boolean isMaintenanceActive() {
         World realWorld = this.world.realWorld();
         return realWorld != null && IrisToolbelt.isWorldMaintenanceActive(realWorld);
     }
 
+    private boolean shouldThrottleHotload() {
+        if (isMaintenanceActive()) {
+            return true;
+        }
+
+        World realWorld = this.world.realWorld();
+        PregeneratorJob pregeneratorJob = PregeneratorJob.getInstance();
+        return realWorld != null && pregeneratorJob != null && pregeneratorJob.targetsWorld(realWorld);
+    }
+
     @Override
     public int getBaseHeight(@NotNull WorldInfo worldInfo, @NotNull Random random, int x, int z, @NotNull HeightMap heightMap) {
         Engine currentEngine = engine;

core/src/main/java/art/arcane/iris/util/common/data/BiomeMap.java

@@ -19,6 +19,7 @@
 package art.arcane.iris.util.common.data;
 
 import art.arcane.iris.engine.object.IrisBiome;
+import art.arcane.volmlib.util.math.PowerOfTwoCoordinates;
 
 public class BiomeMap {
     private final IrisBiome[] height;
@@ -28,10 +29,10 @@ public class BiomeMap {
     }
 
     public void setBiome(int x, int z, IrisBiome h) {
-        height[x * 16 + z] = h;
+        height[PowerOfTwoCoordinates.packLocal16(x, z)] = h;
     }
 
     public IrisBiome getBiome(int x, int z) {
-        return height[x * 16 + z];
+        return height[PowerOfTwoCoordinates.packLocal16(x, z)];
     }
 }

core/src/main/java/art/arcane/iris/util/project/context/ChunkedDataCache.java

@@ -1,7 +1,7 @@
 package art.arcane.iris.util.project.context;
 
 import art.arcane.iris.util.project.stream.ProceduralStream;
-import art.arcane.iris.util.project.stream.utility.CachedStream2D;
+import art.arcane.iris.util.project.stream.utility.ChunkFillableStream2D;
 import art.arcane.volmlib.util.documentation.BlockCoordinates;
 import java.util.concurrent.Executor;
 
@@ -35,8 +35,8 @@ public class ChunkedDataCache<T> {
             return;
         }
 
-        if (stream instanceof CachedStream2D<?> cachedStream) {
-            cachedStream.fillChunk(x, z, data);
+        if (stream instanceof ChunkFillableStream2D cachedStream) {
+            cachedStream.fillChunkRaw(x, z, data);
             return;
         }
 

core/src/main/java/art/arcane/iris/util/project/interpolation/IrisInterpolation.java

@@ -32,7 +32,6 @@ import art.arcane.volmlib.util.scheduling.PrecisionStopwatch;
 
 import java.math.BigDecimal;
 import java.util.Arrays;
-import java.util.HashMap;
 
 public class IrisInterpolation {
     public static CNG cng = NoiseStyle.SIMPLEX.create(new RNG());
@@ -952,18 +951,10 @@ public class IrisInterpolation {
      */
     public static Hunk<Double> getNoise3D(InterpolationMethod3D method, int xo, int yo, int zo, int w, int h, int d, double radX, double radY, double radZ, NoiseProvider3 n) {
         Hunk<Double> hunk = Hunk.newAtomicDoubleHunk(w, h, d);
-        HashMap<Integer, Double> cache = new HashMap<>();
-        int i, j, k;
-
-        for (i = 0; i < w; i++) {
-            int fi = i;
-            for (j = 0; j < h; j++) {
-                int fj = j;
-                for (k = 0; k < d; k++) {
-                    int fk = k;
-                    hunk.set(i, j, k, cache.computeIfAbsent((k * w * h) + (j * w) + i, (p)
-                            -> getNoise3D(method, fi + xo, fj + yo, fk + zo,
-                            radX, radY, radZ, n)));
+        for (int i = 0; i < w; i++) {
+            for (int j = 0; j < h; j++) {
+                for (int k = 0; k < d; k++) {
+                    hunk.set(i, j, k, getNoise3D(method, i + xo, j + yo, k + zo, radX, radY, radZ, n));
                 }
             }
         }

core/src/main/java/art/arcane/iris/util/project/noise/CNG.java

@@ -74,6 +74,10 @@ public class CNG {
     private NoiseStyle leakStyle;
     private ProceduralStream<Double> customGenerator;
     private transient boolean identityPostFastPath;
+    private transient boolean identitySignedFastPath;
+    private transient boolean unityOpacity;
+    private transient double effectiveScale;
+    private transient double signedFractureScale;
     private transient boolean fastPathStateDirty = true;
 
     public CNG(RNG random) {
@@ -635,7 +639,8 @@ public class CNG {
     }
 
     private double getNoise(double... dim) {
-        double scale = noscale ? 1 : this.bakedScale * this.scale;
+        ensureFastPathState();
+        double scale = effectiveScale;
 
         if (fracture == null || noscale) {
             return generator.noise(
@@ -671,7 +676,8 @@ public class CNG {
     }
 
     private double getNoise(double x) {
-        double scl = noscale ? 1 : this.bakedScale * this.scale;
+        ensureFastPathState();
+        double scl = effectiveScale;
 
         if (fracture == null || noscale) {
             return generator.noise(x * scl, 0D, 0D) * opacity;
@@ -682,7 +688,8 @@ public class CNG {
     }
 
     private double getNoise(double x, double z) {
-        double scl = noscale ? 1 : this.bakedScale * this.scale;
+        ensureFastPathState();
+        double scl = effectiveScale;
 
         if (fracture == null || noscale) {
             return generator.noise(x * scl, z * scl, 0D) * opacity;
@@ -694,7 +701,8 @@ public class CNG {
     }
 
     private double getNoise(double x, double y, double z) {
-        double scl = noscale ? 1 : this.bakedScale * this.scale;
+        ensureFastPathState();
+        double scl = effectiveScale;
 
         if (fracture == null || noscale) {
             return generator.noise(x * scl, y * scl, z * scl) * opacity;
@@ -932,6 +940,18 @@ public class CNG {
         return applyPost(getNoise(x, z), x, z);
     }
 
+    public double noiseFastSigned2D(double x, double z) {
+        if (cache != null && isWholeCoordinate(x) && isWholeCoordinate(z)) {
+            return (cache.get((int) x, (int) z) * 2D) - 1D;
+        }
+
+        if (hasIdentitySignedFastPath()) {
+            return getSignedNoise(x, z);
+        }
+
+        return (noiseFast2D(x, z) * 2D) - 1D;
+    }
+
     public double noise(double x, double y, double z) {
         return applyPost(getNoise(x, y, z), x, y, z);
     }
@@ -944,6 +964,14 @@ public class CNG {
         return applyPost(getNoise(x, y, z), x, y, z);
     }
 
+    public double noiseFastSigned3D(double x, double y, double z) {
+        if (hasIdentitySignedFastPath()) {
+            return getSignedNoise(x, y, z);
+        }
+
+        return (noiseFast3D(x, y, z) * 2D) - 1D;
+    }
+
     public CNG pow(double power) {
         this.power = power;
         markFastPathStateDirty();
@@ -964,11 +992,19 @@ public class CNG {
     }
 
     private boolean isIdentityPostFastPath() {
+        ensureFastPathState();
+        return identityPostFastPath;
+    }
+
+    private boolean hasIdentitySignedFastPath() {
+        ensureFastPathState();
+        return identitySignedFastPath;
+    }
+
+    private void ensureFastPathState() {
         if (fastPathStateDirty) {
             refreshFastPathState();
         }
-
-        return identityPostFastPath;
     }
 
     private void markFastPathStateDirty() {
@@ -976,15 +1012,62 @@ public class CNG {
     }
 
     private void refreshFastPathState() {
+        effectiveScale = noscale ? 1D : bakedScale * scale;
         identityPostFastPath = power == 1D
                 && children == null
                 && fracture == null
                 && down == 0D
                 && up == 0D
                 && patch == 1D;
+        identitySignedFastPath = power == 1D
+                && children == null
+                && down == 0D
+                && up == 0D
+                && patch == 1D;
+        unityOpacity = opacity == 1D;
+        signedFractureScale = 0.5D * fscale;
         fastPathStateDirty = false;
     }
 
+    private double signedWithOpacity(double signedNoise) {
+        if (unityOpacity) {
+            return signedNoise;
+        }
+
+        return ((signedNoise + 1D) * opacity) - 1D;
+    }
+
+    private double getSignedNoise(double x, double z) {
+        ensureFastPathState();
+        double scl = effectiveScale;
+        NoiseGenerator localGenerator = generator;
+        CNG localFracture = fracture;
+
+        if (localFracture == null || noscale) {
+            return signedWithOpacity(localGenerator.noiseSigned(x * scl, z * scl, 0D));
+        }
+
+        double fx = x + (localFracture.noiseFastSigned2D(x, z) * signedFractureScale);
+        double fz = z + (localFracture.noiseFastSigned2D(z, x) * signedFractureScale);
+        return signedWithOpacity(localGenerator.noiseSigned(fx * scl, fz * scl, 0D));
+    }
+
+    private double getSignedNoise(double x, double y, double z) {
+        ensureFastPathState();
+        double scl = effectiveScale;
+        NoiseGenerator localGenerator = generator;
+        CNG localFracture = fracture;
+
+        if (localFracture == null || noscale) {
+            return signedWithOpacity(localGenerator.noiseSigned(x * scl, y * scl, z * scl));
+        }
+
+        double fx = x + (localFracture.noiseFastSigned3D(x, y, z) * signedFractureScale);
+        double fy = y + (localFracture.noiseFastSigned2D(y, x) * signedFractureScale);
+        double fz = z + (localFracture.noiseFastSigned3D(z, x, y) * signedFractureScale);
+        return signedWithOpacity(localGenerator.noiseSigned(fx * scl, fy * scl, fz * scl));
+    }
+
     private enum InjectorMode {
         ADD,
         SRC_SUBTRACT,

core/src/main/java/art/arcane/iris/util/project/noise/FastNoiseDouble.java

@@ -21,14 +21,22 @@ import art.arcane.volmlib.util.math.Vector2f;
 import art.arcane.volmlib.util.math.Vector3f;
 
 public class FastNoiseDouble {
-    private static final Double2[] GRAD_2D = {new Double2(-1, -1), new Double2(1, -1), new Double2(-1, 1), new Double2(1, 1), new Double2(0, -1), new Double2(-1, 0), new Double2(0, 1), new Double2(1, 0),
-    };
-    private static final Double3[] GRAD_3D = {new Double3(1, 1, 0), new Double3(-1, 1, 0), new Double3(1, -1, 0), new Double3(-1, -1, 0), new Double3(1, 0, 1), new Double3(-1, 0, 1), new Double3(1, 0, -1), new Double3(-1, 0, -1), new Double3(0, 1, 1), new Double3(0, -1, 1), new Double3(0, 1, -1), new Double3(0, -1, -1), new Double3(1, 1, 0), new Double3(0, -1, 1), new Double3(-1, 1, 0), new Double3(0, -1, -1),
+    private static final double[] GRAD_2D = {-1D, -1D, 1D, -1D, -1D, 1D, 1D, 1D, 0D, -1D, -1D, 0D, 0D, 1D, 1D, 0D};
+    private static final double[] GRAD_3D = {
+            1D, 1D, 0D, -1D, 1D, 0D, 1D, -1D, 0D, -1D, -1D, 0D,
+            1D, 0D, 1D, -1D, 0D, 1D, 1D, 0D, -1D, -1D, 0D, -1D,
+            0D, 1D, 1D, 0D, -1D, 1D, 0D, 1D, -1D, 0D, -1D, -1D,
+            1D, 1D, 0D, 0D, -1D, 1D, -1D, 1D, 0D, 0D, -1D, -1D
     };
     private static final Double2[] CELL_2D = {new Double2(-0.4313539279f, 0.1281943404f), new Double2(-0.1733316799f, 0.415278375f), new Double2(-0.2821957395f, -0.3505218461f), new Double2(-0.2806473808f, 0.3517627718f), new Double2(0.3125508975f, -0.3237467165f), new Double2(0.3383018443f, -0.2967353402f), new Double2(-0.4393982022f, -0.09710417025f), new Double2(-0.4460443703f, -0.05953502905f), new Double2(-0.302223039f, 0.3334085102f), new Double2(-0.212681052f, -0.3965687458f), new Double2(-0.2991156529f, 0.3361990872f), new Double2(0.2293323691f, 0.3871778202f), new Double2(0.4475439151f, -0.04695150755f), new Double2(0.1777518f, 0.41340573f), new Double2(0.1688522499f, -0.4171197882f), new Double2(-0.0976597166f, 0.4392750616f), new Double2(0.08450188373f, 0.4419948321f), new Double2(-0.4098760448f, -0.1857461384f), new Double2(0.3476585782f, -0.2857157906f), new Double2(-0.3350670039f, -0.30038326f), new Double2(0.2298190031f, -0.3868891648f), new Double2(-0.01069924099f, 0.449872789f), new Double2(-0.4460141246f, -0.05976119672f), new Double2(0.3650293864f, 0.2631606867f), new Double2(-0.349479423f, 0.2834856838f), new Double2(-0.4122720642f, 0.1803655873f), new Double2(-0.267327811f, 0.3619887311f), new Double2(0.322124041f, -0.3142230135f), new Double2(0.2880445931f, -0.3457315612f), new Double2(0.3892170926f, -0.2258540565f), new Double2(0.4492085018f, -0.02667811596f), new Double2(-0.4497724772f, 0.01430799601f), new Double2(0.1278175387f, -0.4314657307f), new Double2(-0.03572100503f, 0.4485799926f), new Double2(-0.4297407068f, -0.1335025276f), new Double2(-0.3217817723f, 0.3145735065f), new Double2(-0.3057158873f, 0.3302087162f), new Double2(-0.414503978f, 0.1751754899f), new Double2(-0.3738139881f, 0.2505256519f), new Double2(0.2236891408f, -0.3904653228f), new Double2(0.002967775577f, -0.4499902136f), new Double2(0.1747128327f, -0.4146991995f), new Double2(-0.4423772489f, -0.08247647938f), new Double2(-0.2763960987f, -0.355112935f), new Double2(-0.4019385906f, -0.2023496216f), new Double2(0.3871414161f, -0.2293938184f), new Double2(-0.430008727f, 0.1326367019f), new Double2(-0.03037574274f, -0.4489736231f), new Double2(-0.3486181573f, 0.2845441624f), new Double2(0.04553517144f, -0.4476902368f), new Double2(-0.0375802926f, 0.4484280562f), new Double2(0.3266408905f, 0.3095250049f), new Double2(0.06540017593f, -0.4452222108f), new Double2(0.03409025829f, 0.448706869f), new Double2(-0.4449193635f, 0.06742966669f), new Double2(-0.4255936157f, -0.1461850686f), new Double2(0.449917292f, 0.008627302568f), new Double2(0.05242606404f, 0.4469356864f), new Double2(-0.4495305179f, -0.02055026661f), new Double2(-0.1204775703f, 0.4335725488f), new Double2(-0.341986385f, -0.2924813028f), new Double2(0.3865320182f, 0.2304191809f), new Double2(0.04506097811f, -0.447738214f), new Double2(-0.06283465979f, 0.4455915232f), new Double2(0.3932600341f, -0.2187385324f), new Double2(0.4472261803f, -0.04988730975f), new Double2(0.3753571011f, -0.2482076684f), new Double2(-0.273662295f, 0.357223947f), new Double2(0.1700461538f, 0.4166344988f), new Double2(0.4102692229f, 0.1848760794f), new Double2(0.323227187f, -0.3130881435f), new Double2(-0.2882310238f, -0.3455761521f), new Double2(0.2050972664f, 0.4005435199f), new Double2(0.4414085979f, -0.08751256895f), new Double2(-0.1684700334f, 0.4172743077f), new Double2(-0.003978032396f, 0.4499824166f), new Double2(-0.2055133639f, 0.4003301853f), new Double2(-0.006095674897f, -0.4499587123f), new Double2(-0.1196228124f, -0.4338091548f), new Double2(0.3901528491f, -0.2242337048f), new Double2(0.01723531752f, 0.4496698165f), new Double2(-0.3015070339f, 0.3340561458f), new Double2(-0.01514262423f, -0.4497451511f), new Double2(-0.4142574071f, -0.1757577897f), new Double2(-0.1916377265f, -0.4071547394f), new Double2(0.3749248747f, 0.2488600778f), new Double2(-0.2237774255f, 0.3904147331f), new Double2(-0.4166343106f, -0.1700466149f), new Double2(0.3619171625f, 0.267424695f), new Double2(0.1891126846f, -0.4083336779f), new Double2(-0.3127425077f, 0.323561623f), new Double2(-0.3281807787f, 0.307891826f), new Double2(-0.2294806661f, 0.3870899429f), new Double2(-0.3445266136f, 0.2894847362f), new Double2(-0.4167095422f, -0.1698621719f), new Double2(-0.257890321f, -0.3687717212f), new Double2(-0.3612037825f, 0.2683874578f), new Double2(0.2267996491f, 0.3886668486f), new Double2(0.207157062f, 0.3994821043f), new Double2(0.08355176718f, -0.4421754202f), new Double2(-0.4312233307f, 0.1286329626f), new Double2(0.3257055497f, 0.3105090899f), new Double2(0.177701095f, -0.4134275279f), new Double2(-0.445182522f, 0.06566979625f), new Double2(0.3955143435f, 0.2146355146f), new Double2(-0.4264613988f, 0.1436338239f), new Double2(-0.3793799665f, -0.2420141339f), new Double2(0.04617599081f, -0.4476245948f), new Double2(-0.371405428f, -0.2540826796f), new Double2(0.2563570295f, -0.3698392535f), new Double2(0.03476646309f, 0.4486549822f), new Double2(-0.3065454405f, 0.3294387544f), new Double2(-0.2Line truncated
     };
     private static final Double3[] CELL_3D = {new Double3(0.1453787434f, -0.4149781685f, -0.0956981749f), new Double3(-0.01242829687f, -0.1457918398f, -0.4255470325f), new Double3(0.2877979582f, -0.02606483451f, -0.3449535616f), new Double3(-0.07732986802f, 0.2377094325f, 0.3741848704f), new Double3(0.1107205875f, -0.3552302079f, -0.2530858567f), new Double3(0.2755209141f, 0.2640521179f, -0.238463215f), new Double3(0.294168941f, 0.1526064594f, 0.3044271714f), new Double3(0.4000921098f, -0.2034056362f, 0.03244149937f), new Double3(-0.1697304074f, 0.3970864695f, -0.1265461359f), new Double3(-0.1483224484f, -0.3859694688f, 0.1775613147f), new Double3(0.2623596946f, -0.2354852944f, 0.2796677792f), new Double3(-0.2709003183f, 0.3505271138f, -0.07901746678f), new Double3(-0.03516550699f, 0.3885234328f, 0.2243054374f), new Double3(-0.1267712655f, 0.1920044036f, 0.3867342179f), new Double3(0.02952021915f, 0.4409685861f, 0.08470692262f), new Double3(-0.2806854217f, -0.266996757f, 0.2289725438f), new Double3(-0.171159547f, 0.2141185563f, 0.3568720405f), new Double3(0.2113227183f, 0.3902405947f, -0.07453178509f), new Double3(-0.1024352839f, 0.2128044156f, -0.3830421561f), new Double3(-0.3304249877f, -0.1566986703f, 0.2622305365f), new Double3(0.2091111325f, 0.3133278055f, -0.2461670583f), new Double3(0.344678154f, -0.1944240454f, -0.2142341261f), new Double3(0.1984478035f, -0.3214342325f, -0.2445373252f), new Double3(-0.2929008603f, 0.2262915116f, 0.2559320961f), new Double3(-0.1617332831f, 0.006314769776f, -0.4198838754f), new Double3(-0.3582060271f, -0.148303178f, -0.2284613961f), new Double3(-0.1852067326f, -0.3454119342f, -0.2211087107f), new Double3(0.3046301062f, 0.1026310383f, 0.314908508f), new Double3(-0.03816768434f, -0.2551766358f, -0.3686842991f), new Double3(-0.4084952196f, 0.1805950793f, 0.05492788837f), new Double3(-0.02687443361f, -0.2749741471f, 0.3551999201f), new Double3(-0.03801098351f, 0.3277859044f, 0.3059600725f), new Double3(0.2371120802f, 0.2900386767f, -0.2493099024f), new Double3(0.4447660503f, 0.03946930643f, 0.05590469027f), new Double3(0.01985147278f, -0.01503183293f, -0.4493105419f), new Double3(0.4274339143f, 0.03345994256f, -0.1366772882f), new Double3(-0.2072988631f, 0.2871414597f, -0.2776273824f), new Double3(-0.3791240978f, 0.1281177671f, 0.2057929936f), new Double3(-0.2098721267f, -0.1007087278f, -0.3851122467f), new Double3(0.01582798878f, 0.4263894424f, 0.1429738373f), new Double3(-0.1888129464f, -0.3160996813f, -0.2587096108f), new Double3(0.1612988974f, -0.1974805082f, -0.3707885038f), new Double3(-0.08974491322f, 0.229148752f, -0.3767448739f), new Double3(0.07041229526f, 0.4150230285f, -0.1590534329f), new Double3(-0.1082925611f, -0.1586061639f, 0.4069604477f), new Double3(0.2474100658f, -0.3309414609f, 0.1782302128f), new Double3(-0.1068836661f, -0.2701644537f, -0.3436379634f), new Double3(0.2396452163f, 0.06803600538f, -0.3747549496f), new Double3(-0.3063886072f, 0.2597428179f, 0.2028785103f), new Double3(0.1593342891f, -0.3114350249f, -0.2830561951f), new Double3(0.2709690528f, 0.1412648683f, -0.3303331794f), new Double3(-0.1519780427f, 0.3623355133f, 0.2193527988f), new Double3(0.1699773681f, 0.3456012883f, 0.2327390037f), new Double3(-0.1986155616f, 0.3836276443f, -0.1260225743f), new Double3(-0.1887482106f, -0.2050154888f, -0.353330953f), new Double3(0.2659103394f, 0.3015631259f, -0.2021172246f), new Double3(-0.08838976154f, -0.4288819642f, -0.1036702021f), new Double3(-0.04201869311f, 0.3099592485f, 0.3235115047f), new Double3(-0.3230334656f, 0.201549922f, -0.2398478873f), new Double3(0.2612720941f, 0.2759854499f, -0.2409749453f), new Double3(0.385713046f, 0.2193460345f, 0.07491837764f), new Double3(0.07654967953f, 0.3721732183f, 0.241095919f), new Double3(0.4317038818f, -0.02577753072f, 0.1243675091f), new Double3(-0.2890436293f, -0.3418179959f, -0.04598084447f), new Double3(-0.2201947582f, 0.383023377f, -0.08548310451f), new Double3(0.4161322773f, -0.1669634289f, -0.03817251927f), new Double3(0.2204718095f, 0.02654238946f, -0.391391981f), new Double3(-0.1040307469f, 0.3890079625f, -0.2008741118f), new Double3(-0.1432122615f, 0.371614387f, -0.2095065525f), new Double3(0.3978380468f, -0.06206669342f, 0.2009293758f), new Double3(-0.2599274663f, 0.2616724959f, -0.2578084893f), new Double3(0.4032618332f, -0.1124593585f, 0.1650235939f), new Double3(-0.08953470255f, -0.3048244735f, 0.3186935478f), new Double3(0.118937202f, -0.2875221847f, 0.325092195f), new Double3(0.02167047076f, -0.03284630549f, -0.4482761547f), new Double3(-0.3411343612f, 0.2500031105f, 0.1537068389f), new Double3(0.3162964612f, 0.3082064153f, -0.08640228117f), new Double3(0.2355138889f, -0.3439334267f, -0.1695376245f), new Double3(-0.02874541518f, -0.3955933019f, 0.2125550295f), new Double3(-0.2461455173f, 0.02020282325f, -0.3761704803f), new Double3(0.04208029445f, -0.4470439576f, 0.02968078139f), new Double3(0.2727458746f, 0.2288471896f, -0.2752065618f), new Double3(-0.1347522818f, -0.02720848277f, -0Line truncated
     };
+    private static final double[] CELL_2D_X = extractCell2DComponent(true);
+    private static final double[] CELL_2D_Y = extractCell2DComponent(false);
+    private static final double[] CELL_3D_X = extractCell3DComponent(0);
+    private static final double[] CELL_3D_Y = extractCell3DComponent(1);
+    private static final double[] CELL_3D_Z = extractCell3DComponent(2);
     // Hashing
     private final static long X_PRIME = 1619;
     private final static long Y_PRIME = 31337;
@@ -98,6 +106,24 @@ public class FastNoiseDouble {
         return t * t * t * p + t * t * ((a - b) - p) + t * (c - a) + b;
     }
 
+    private static double[] extractCell2DComponent(boolean xComponent) {
+        double[] components = new double[CELL_2D.length];
+        for (int i = 0; i < CELL_2D.length; i++) {
+            Double2 value = CELL_2D[i];
+            components[i] = xComponent ? value.x : value.y;
+        }
+        return components;
+    }
+
+    private static double[] extractCell3DComponent(int axis) {
+        double[] components = new double[CELL_3D.length];
+        for (int i = 0; i < CELL_3D.length; i++) {
+            Double3 value = CELL_3D[i];
+            components[i] = axis == 0 ? value.x : axis == 1 ? value.y : value.z;
+        }
+        return components;
+    }
+
     private static long hash2D(long seed, long x, long y) {
         long hash = seed;
         hash ^= X_PRIME * x;
@@ -169,9 +195,8 @@ public class FastNoiseDouble {
         hash = hash * hash * hash * 60493;
         hash = (hash >> 13) ^ hash;
 
-        Double2 g = GRAD_2D[(int) hash & 7];
-
-        return xd * g.x + yd * g.y;
+        int gradientIndex = ((int) hash & 7) << 1;
+        return (xd * GRAD_2D[gradientIndex]) + (yd * GRAD_2D[gradientIndex + 1]);
     }
 
     private static double GradCoord3D(long seed, long x, long y, long z, double xd, double yd, double zd) {
@@ -183,9 +208,8 @@ public class FastNoiseDouble {
         hash = hash * hash * hash * 60493;
         hash = (hash >> 13) ^ hash;
 
-        Double3 g = GRAD_3D[(int) (hash & 15)];
-
-        return xd * g.x + yd * g.y + zd * g.z;
+        int gradientIndex = ((int) (hash & 15)) * 3;
+        return (xd * GRAD_3D[gradientIndex]) + (yd * GRAD_3D[gradientIndex + 1]) + (zd * GRAD_3D[gradientIndex + 2]);
     }
 
     private static double GradCoord4D(long seed, long x, long y, long z, long w, double xd, double yd, double zd, double wd) {
@@ -1457,6 +1481,10 @@ public class FastNoiseDouble {
         long xr = fastRound(x);
         long yr = fastRound(y);
         long zr = fastRound(z);
+        long seed = m_seed;
+        double[] cell3dX = CELL_3D_X;
+        double[] cell3dY = CELL_3D_Y;
+        double[] cell3dZ = CELL_3D_Z;
 
         double distance = 999999;
         long xc = 0, yc = 0, zc = 0;
@@ -1464,13 +1492,15 @@ public class FastNoiseDouble {
         switch (m_cellularDistanceFunction) {
             case Euclidean:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
+                        double baseVecY = yi - y;
                         for (long zi = zr - 1; zi <= zr + 1; zi++) {
-                            Double3 vec = CELL_3D[(int) hash3D(m_seed, xi, yi, zi) & 255];
-
-                            double vecX = xi - x + vec.x;
-                            double vecY = yi - y + vec.y;
-                            double vecZ = zi - z + vec.z;
+                            double baseVecZ = zi - z;
+                            int cellIndex3D = (int) hash3D(seed, xi, yi, zi) & 255;
+                            double vecX = baseVecX + cell3dX[cellIndex3D];
+                            double vecY = baseVecY + cell3dY[cellIndex3D];
+                            double vecZ = baseVecZ + cell3dZ[cellIndex3D];
 
                             double newDistance = vecX * vecX + vecY * vecY + vecZ * vecZ;
 
@@ -1486,13 +1516,15 @@ public class FastNoiseDouble {
                 break;
             case Manhattan:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
+                        double baseVecY = yi - y;
                         for (long zi = zr - 1; zi <= zr + 1; zi++) {
-                            Double3 vec = CELL_3D[(int) hash3D(m_seed, xi, yi, zi) & 255];
-
-                            double vecX = xi - x + vec.x;
-                            double vecY = yi - y + vec.y;
-                            double vecZ = zi - z + vec.z;
+                            double baseVecZ = zi - z;
+                            int cellIndex3D = (int) hash3D(seed, xi, yi, zi) & 255;
+                            double vecX = baseVecX + cell3dX[cellIndex3D];
+                            double vecY = baseVecY + cell3dY[cellIndex3D];
+                            double vecZ = baseVecZ + cell3dZ[cellIndex3D];
 
                             double newDistance = Math.abs(vecX) + Math.abs(vecY) + Math.abs(vecZ);
 
@@ -1508,13 +1540,15 @@ public class FastNoiseDouble {
                 break;
             case Natural:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
+                        double baseVecY = yi - y;
                         for (long zi = zr - 1; zi <= zr + 1; zi++) {
-                            Double3 vec = CELL_3D[(int) hash3D(m_seed, xi, yi, zi) & 255];
-
-                            double vecX = xi - x + vec.x;
-                            double vecY = yi - y + vec.y;
-                            double vecZ = zi - z + vec.z;
+                            double baseVecZ = zi - z;
+                            int cellIndex3D = (int) hash3D(seed, xi, yi, zi) & 255;
+                            double vecX = baseVecX + cell3dX[cellIndex3D];
+                            double vecY = baseVecY + cell3dY[cellIndex3D];
+                            double vecZ = baseVecZ + cell3dZ[cellIndex3D];
 
                             double newDistance = (Math.abs(vecX) + Math.abs(vecY) + Math.abs(vecZ)) + (vecX * vecX + vecY * vecY + vecZ * vecZ);
 
@@ -1535,8 +1569,8 @@ public class FastNoiseDouble {
                 return valCoord3D(0, xc, yc, zc);
 
             case NoiseLookup:
-                Double3 vec = CELL_3D[(int) hash3D(m_seed, xc, yc, zc) & 255];
-                return m_cellularNoiseLookup.GetNoise(xc + vec.x, yc + vec.y, zc + vec.z);
+                int lookupIndex3D = (int) hash3D(m_seed, xc, yc, zc) & 255;
+                return m_cellularNoiseLookup.GetNoise(xc + CELL_3D_X[lookupIndex3D], yc + CELL_3D_Y[lookupIndex3D], zc + CELL_3D_Z[lookupIndex3D]);
 
             case Distance:
                 return distance - 1;
@@ -1549,6 +1583,10 @@ public class FastNoiseDouble {
         long xr = fastRound(x);
         long yr = fastRound(y);
         long zr = fastRound(z);
+        long seed = m_seed;
+        double[] cell3dX = CELL_3D_X;
+        double[] cell3dY = CELL_3D_Y;
+        double[] cell3dZ = CELL_3D_Z;
 
         double distance = 999999;
         double distance2 = 999999;
@@ -1556,54 +1594,72 @@ public class FastNoiseDouble {
         switch (m_cellularDistanceFunction) {
             case Euclidean:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
+                        double baseVecY = yi - y;
                         for (long zi = zr - 1; zi <= zr + 1; zi++) {
-                            Double3 vec = CELL_3D[(int) hash3D(m_seed, xi, yi, zi) & 255];
-
-                            double vecX = xi - x + vec.x;
-                            double vecY = yi - y + vec.y;
-                            double vecZ = zi - z + vec.z;
+                            double baseVecZ = zi - z;
+                            int cellIndex3D = (int) hash3D(seed, xi, yi, zi) & 255;
+                            double vecX = baseVecX + cell3dX[cellIndex3D];
+                            double vecY = baseVecY + cell3dY[cellIndex3D];
+                            double vecZ = baseVecZ + cell3dZ[cellIndex3D];
 
                             double newDistance = vecX * vecX + vecY * vecY + vecZ * vecZ;
 
-                            distance2 = Math.max(Math.min(distance2, newDistance), distance);
-                            distance = Math.min(distance, newDistance);
+                            if (newDistance < distance) {
+                                distance2 = distance;
+                                distance = newDistance;
+                            } else if (newDistance < distance2) {
+                                distance2 = newDistance;
+                            }
                         }
                     }
                 }
                 break;
             case Manhattan:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
+                        double baseVecY = yi - y;
                         for (long zi = zr - 1; zi <= zr + 1; zi++) {
-                            Double3 vec = CELL_3D[(int) hash3D(m_seed, xi, yi, zi) & 255];
-
-                            double vecX = xi - x + vec.x;
-                            double vecY = yi - y + vec.y;
-                            double vecZ = zi - z + vec.z;
+                            double baseVecZ = zi - z;
+                            int cellIndex3D = (int) hash3D(seed, xi, yi, zi) & 255;
+                            double vecX = baseVecX + cell3dX[cellIndex3D];
+                            double vecY = baseVecY + cell3dY[cellIndex3D];
+                            double vecZ = baseVecZ + cell3dZ[cellIndex3D];
 
                             double newDistance = Math.abs(vecX) + Math.abs(vecY) + Math.abs(vecZ);
 
-                            distance2 = Math.max(Math.min(distance2, newDistance), distance);
-                            distance = Math.min(distance, newDistance);
+                            if (newDistance < distance) {
+                                distance2 = distance;
+                                distance = newDistance;
+                            } else if (newDistance < distance2) {
+                                distance2 = newDistance;
+                            }
                         }
                     }
                 }
                 break;
             case Natural:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
+                        double baseVecY = yi - y;
                         for (long zi = zr - 1; zi <= zr + 1; zi++) {
-                            Double3 vec = CELL_3D[(int) hash3D(m_seed, xi, yi, zi) & 255];
-
-                            double vecX = xi - x + vec.x;
-                            double vecY = yi - y + vec.y;
-                            double vecZ = zi - z + vec.z;
+                            double baseVecZ = zi - z;
+                            int cellIndex3D = (int) hash3D(seed, xi, yi, zi) & 255;
+                            double vecX = baseVecX + cell3dX[cellIndex3D];
+                            double vecY = baseVecY + cell3dY[cellIndex3D];
+                            double vecZ = baseVecZ + cell3dZ[cellIndex3D];
 
                             double newDistance = (Math.abs(vecX) + Math.abs(vecY) + Math.abs(vecZ)) + (vecX * vecX + vecY * vecY + vecZ * vecZ);
 
-                            distance2 = Math.max(Math.min(distance2, newDistance), distance);
-                            distance = Math.min(distance, newDistance);
+                            if (newDistance < distance) {
+                                distance2 = distance;
+                                distance = newDistance;
+                            } else if (newDistance < distance2) {
+                                distance2 = newDistance;
+                            }
                         }
                     }
                 }
@@ -1635,6 +1691,9 @@ public class FastNoiseDouble {
     private double SingleCellular(double x, double y) {
         long xr = fastRound(x);
         long yr = fastRound(y);
+        long seed = m_seed;
+        double[] cell2dX = CELL_2D_X;
+        double[] cell2dY = CELL_2D_Y;
 
         double distance = 999999;
         long xc = 0, yc = 0;
@@ -1643,11 +1702,12 @@ public class FastNoiseDouble {
             default:
             case Euclidean:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
-                        Double2 vec = CELL_2D[(int) hash2D(m_seed, xi, yi) & 255];
-
-                        double vecX = xi - x + vec.x;
-                        double vecY = yi - y + vec.y;
+                        double baseVecY = yi - y;
+                        int cellIndex2D = (int) hash2D(seed, xi, yi) & 255;
+                        double vecX = baseVecX + cell2dX[cellIndex2D];
+                        double vecY = baseVecY + cell2dY[cellIndex2D];
 
                         double newDistance = vecX * vecX + vecY * vecY;
 
@@ -1661,11 +1721,12 @@ public class FastNoiseDouble {
                 break;
             case Manhattan:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
-                        Double2 vec = CELL_2D[(int) hash2D(m_seed, xi, yi) & 255];
-
-                        double vecX = xi - x + vec.x;
-                        double vecY = yi - y + vec.y;
+                        double baseVecY = yi - y;
+                        int cellIndex2D = (int) hash2D(seed, xi, yi) & 255;
+                        double vecX = baseVecX + cell2dX[cellIndex2D];
+                        double vecY = baseVecY + cell2dY[cellIndex2D];
 
                         double newDistance = (Math.abs(vecX) + Math.abs(vecY));
 
@@ -1679,11 +1740,12 @@ public class FastNoiseDouble {
                 break;
             case Natural:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
-                        Double2 vec = CELL_2D[(int) hash2D(m_seed, xi, yi) & 255];
-
-                        double vecX = xi - x + vec.x;
-                        double vecY = yi - y + vec.y;
+                        double baseVecY = yi - y;
+                        int cellIndex2D = (int) hash2D(seed, xi, yi) & 255;
+                        double vecX = baseVecX + cell2dX[cellIndex2D];
+                        double vecY = baseVecY + cell2dY[cellIndex2D];
 
                         double newDistance = (Math.abs(vecX) + Math.abs(vecY)) + (vecX * vecX + vecY * vecY);
 
@@ -1702,8 +1764,8 @@ public class FastNoiseDouble {
                 return valCoord2D(0, xc, yc);
 
             case NoiseLookup:
-                Double2 vec = CELL_2D[(int) hash2D(m_seed, xc, yc) & 255];
-                return m_cellularNoiseLookup.GetNoise(xc + vec.x, yc + vec.y);
+                int lookupIndex2D = (int) hash2D(m_seed, xc, yc) & 255;
+                return m_cellularNoiseLookup.GetNoise(xc + CELL_2D_X[lookupIndex2D], yc + CELL_2D_Y[lookupIndex2D]);
 
             case Distance:
                 return distance - 1;
@@ -1715,6 +1777,9 @@ public class FastNoiseDouble {
     private double SingleCellular2Edge(double x, double y) {
         long xr = fastRound(x);
         long yr = fastRound(y);
+        long seed = m_seed;
+        double[] cell2dX = CELL_2D_X;
+        double[] cell2dY = CELL_2D_Y;
 
         double distance = 999999;
         double distance2 = 999999;
@@ -1723,46 +1788,61 @@ public class FastNoiseDouble {
             default:
             case Euclidean:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
-                        Double2 vec = CELL_2D[(int) hash2D(m_seed, xi, yi) & 255];
-
-                        double vecX = xi - x + vec.x;
-                        double vecY = yi - y + vec.y;
+                        double baseVecY = yi - y;
+                        int cellIndex2D = (int) hash2D(seed, xi, yi) & 255;
+                        double vecX = baseVecX + cell2dX[cellIndex2D];
+                        double vecY = baseVecY + cell2dY[cellIndex2D];
 
                         double newDistance = vecX * vecX + vecY * vecY;
 
-                        distance2 = Math.max(Math.min(distance2, newDistance), distance);
-                        distance = Math.min(distance, newDistance);
+                        if (newDistance < distance) {
+                            distance2 = distance;
+                            distance = newDistance;
+                        } else if (newDistance < distance2) {
+                            distance2 = newDistance;
+                        }
                     }
                 }
                 break;
             case Manhattan:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
-                        Double2 vec = CELL_2D[(int) hash2D(m_seed, xi, yi) & 255];
-
-                        double vecX = xi - x + vec.x;
-                        double vecY = yi - y + vec.y;
+                        double baseVecY = yi - y;
+                        int cellIndex2D = (int) hash2D(seed, xi, yi) & 255;
+                        double vecX = baseVecX + cell2dX[cellIndex2D];
+                        double vecY = baseVecY + cell2dY[cellIndex2D];
 
                         double newDistance = Math.abs(vecX) + Math.abs(vecY);
 
-                        distance2 = Math.max(Math.min(distance2, newDistance), distance);
-                        distance = Math.min(distance, newDistance);
+                        if (newDistance < distance) {
+                            distance2 = distance;
+                            distance = newDistance;
+                        } else if (newDistance < distance2) {
+                            distance2 = newDistance;
+                        }
                     }
                 }
                 break;
             case Natural:
                 for (long xi = xr - 1; xi <= xr + 1; xi++) {
+                    double baseVecX = xi - x;
                     for (long yi = yr - 1; yi <= yr + 1; yi++) {
-                        Double2 vec = CELL_2D[(int) hash2D(m_seed, xi, yi) & 255];
-
-                        double vecX = xi - x + vec.x;
-                        double vecY = yi - y + vec.y;
+                        double baseVecY = yi - y;
+                        int cellIndex2D = (int) hash2D(seed, xi, yi) & 255;
+                        double vecX = baseVecX + cell2dX[cellIndex2D];
+                        double vecY = baseVecY + cell2dY[cellIndex2D];
 
                         double newDistance = (Math.abs(vecX) + Math.abs(vecY)) + (vecX * vecX + vecY * vecY);
 
-                        distance2 = Math.max(Math.min(distance2, newDistance), distance);
-                        distance = Math.min(distance, newDistance);
+                        if (newDistance < distance) {
+                            distance2 = distance;
+                            distance = newDistance;
+                        } else if (newDistance < distance2) {
+                            distance2 = newDistance;
+                        }
                     }
                 }
                 break;
@@ -1827,37 +1907,37 @@ public class FastNoiseDouble {
             }
         }
 
-        Double3 vec0 = CELL_3D[(int) hash3D(seed, x0, y0, z0) & 255];
-        Double3 vec1 = CELL_3D[(int) hash3D(seed, x1, y0, z0) & 255];
+        int vecIndex000 = (int) hash3D(seed, x0, y0, z0) & 255;
+        int vecIndex100 = (int) hash3D(seed, x1, y0, z0) & 255;
 
-        double lx0x = lerp(vec0.x, vec1.x, xs);
-        double ly0x = lerp(vec0.y, vec1.y, xs);
-        double lz0x = lerp(vec0.z, vec1.z, xs);
+        double lx0x = lerp(CELL_3D_X[vecIndex000], CELL_3D_X[vecIndex100], xs);
+        double ly0x = lerp(CELL_3D_Y[vecIndex000], CELL_3D_Y[vecIndex100], xs);
+        double lz0x = lerp(CELL_3D_Z[vecIndex000], CELL_3D_Z[vecIndex100], xs);
 
-        vec0 = CELL_3D[(int) hash3D(seed, x0, y1, z0) & 255];
-        vec1 = CELL_3D[(int) hash3D(seed, x1, y1, z0) & 255];
+        int vecIndex010 = (int) hash3D(seed, x0, y1, z0) & 255;
+        int vecIndex110 = (int) hash3D(seed, x1, y1, z0) & 255;
 
-        double lx1x = lerp(vec0.x, vec1.x, xs);
-        double ly1x = lerp(vec0.y, vec1.y, xs);
-        double lz1x = lerp(vec0.z, vec1.z, xs);
+        double lx1x = lerp(CELL_3D_X[vecIndex010], CELL_3D_X[vecIndex110], xs);
+        double ly1x = lerp(CELL_3D_Y[vecIndex010], CELL_3D_Y[vecIndex110], xs);
+        double lz1x = lerp(CELL_3D_Z[vecIndex010], CELL_3D_Z[vecIndex110], xs);
 
         double lx0y = lerp(lx0x, lx1x, ys);
         double ly0y = lerp(ly0x, ly1x, ys);
         double lz0y = lerp(lz0x, lz1x, ys);
 
-        vec0 = CELL_3D[(int) hash3D(seed, x0, y0, z1) & 255];
-        vec1 = CELL_3D[(int) hash3D(seed, x1, y0, z1) & 255];
+        int vecIndex001 = (int) hash3D(seed, x0, y0, z1) & 255;
+        int vecIndex101 = (int) hash3D(seed, x1, y0, z1) & 255;
 
-        lx0x = lerp(vec0.x, vec1.x, xs);
-        ly0x = lerp(vec0.y, vec1.y, xs);
-        lz0x = lerp(vec0.z, vec1.z, xs);
+        lx0x = lerp(CELL_3D_X[vecIndex001], CELL_3D_X[vecIndex101], xs);
+        ly0x = lerp(CELL_3D_Y[vecIndex001], CELL_3D_Y[vecIndex101], xs);
+        lz0x = lerp(CELL_3D_Z[vecIndex001], CELL_3D_Z[vecIndex101], xs);
 
-        vec0 = CELL_3D[(int) hash3D(seed, x0, y1, z1) & 255];
-        vec1 = CELL_3D[(int) hash3D(seed, x1, y1, z1) & 255];
+        int vecIndex011 = (int) hash3D(seed, x0, y1, z1) & 255;
+        int vecIndex111 = (int) hash3D(seed, x1, y1, z1) & 255;
 
-        lx1x = lerp(vec0.x, vec1.x, xs);
-        ly1x = lerp(vec0.y, vec1.y, xs);
-        lz1x = lerp(vec0.z, vec1.z, xs);
+        lx1x = lerp(CELL_3D_X[vecIndex011], CELL_3D_X[vecIndex111], xs);
+        ly1x = lerp(CELL_3D_Y[vecIndex011], CELL_3D_Y[vecIndex111], xs);
+        lz1x = lerp(CELL_3D_Z[vecIndex011], CELL_3D_Z[vecIndex111], xs);
 
         v3.x += lerp(lx0y, lerp(lx0x, lx1x, ys), zs) * perturbAmp;
         v3.y += lerp(ly0y, lerp(ly0x, ly1x, ys), zs) * perturbAmp;
@@ -1907,17 +1987,17 @@ public class FastNoiseDouble {
             }
         }
 
-        Double2 vec0 = CELL_2D[(int) hash2D(seed, x0, y0) & 255];
-        Double2 vec1 = CELL_2D[(int) hash2D(seed, x1, y0) & 255];
+        int vecIndex00 = (int) hash2D(seed, x0, y0) & 255;
+        int vecIndex10 = (int) hash2D(seed, x1, y0) & 255;
 
-        double lx0x = lerp(vec0.x, vec1.x, xs);
-        double ly0x = lerp(vec0.y, vec1.y, xs);
+        double lx0x = lerp(CELL_2D_X[vecIndex00], CELL_2D_X[vecIndex10], xs);
+        double ly0x = lerp(CELL_2D_Y[vecIndex00], CELL_2D_Y[vecIndex10], xs);
 
-        vec0 = CELL_2D[(int) hash2D(seed, x0, y1) & 255];
-        vec1 = CELL_2D[(int) hash2D(seed, x1, y1) & 255];
+        int vecIndex01 = (int) hash2D(seed, x0, y1) & 255;
+        int vecIndex11 = (int) hash2D(seed, x1, y1) & 255;
 
-        double lx1x = lerp(vec0.x, vec1.x, xs);
-        double ly1x = lerp(vec0.y, vec1.y, xs);
+        double lx1x = lerp(CELL_2D_X[vecIndex01], CELL_2D_X[vecIndex11], xs);
+        double ly1x = lerp(CELL_2D_Y[vecIndex01], CELL_2D_Y[vecIndex11], xs);
 
         v2.x += lerp(lx0x, lx1x, ys) * perturbAmp;
         v2.y += lerp(ly0x, ly1x, ys) * perturbAmp;

core/src/main/java/art/arcane/iris/util/project/noise/FractalFBMSimplexNoise.java

@@ -38,16 +38,31 @@ public class FractalFBMSimplexNoise implements NoiseGenerator, OctaveNoise {
         return f(n.GetSimplexFractal(x, 0d));
     }
 
+    @Override
+    public double noiseSigned(double x) {
+        return n.GetSimplexFractal(x, 0D);
+    }
+
     @Override
     public double noise(double x, double z) {
         return f(n.GetSimplexFractal(x, z));
     }
 
+    @Override
+    public double noiseSigned(double x, double z) {
+        return n.GetSimplexFractal(x, z);
+    }
+
     @Override
     public double noise(double x, double y, double z) {
         return f(n.GetSimplexFractal(x, y, z));
     }
 
+    @Override
+    public double noiseSigned(double x, double y, double z) {
+        return n.GetSimplexFractal(x, y, z);
+    }
+
     @Override
     public void setOctaves(int o) {
         n.setFractalOctaves(o);

core/src/main/java/art/arcane/iris/util/project/noise/HexJamesNoise.java

@@ -24,6 +24,7 @@ public class HexJamesNoise implements NoiseGenerator, OctaveNoise {
             {-1L, 1L},
             {0L, 1L}
     };
+    private static final ThreadLocal<HexScratch> SCRATCH = ThreadLocal.withInitial(HexScratch::new);
     private final long seed;
     private final SimplexNoise heatSimplex;
     private int octaves;
@@ -221,6 +222,9 @@ public class HexJamesNoise implements NoiseGenerator, OctaveNoise {
     }
 
     private double sample(double x, double z) {
+        HexScratch scratch = SCRATCH.get();
+        double[] centersQ = scratch.centersQ;
+        double[] centersR = scratch.centersR;
         double qWorld = (SQRT_3_OVER_3 * x) - (z / 3.0);
         double rWorld = TWO_OVER_THREE * z;
         long[] rounded = roundAxial(qWorld, rWorld);
@@ -233,8 +237,6 @@ public class HexJamesNoise implements NoiseGenerator, OctaveNoise {
         double heat = cellHeat(centerQ, centerR, nodeHash, 0);
 
         for (int level = 0; level < MAX_DEPTH; level++) {
-            double[] centersQ = new double[7];
-            double[] centersR = new double[7];
             int childIndex = pickChildIndex(localQ, localR, centersQ, centersR);
 
             if (childIndex < 0) {
@@ -285,4 +287,9 @@ public class HexJamesNoise implements NoiseGenerator, OctaveNoise {
     public void setOctaves(int o) {
         this.octaves = Math.max(1, o);
     }
+
+    private static final class HexScratch {
+        private final double[] centersQ = new double[7];
+        private final double[] centersR = new double[7];
+    }
 }

core/src/main/java/art/arcane/iris/util/project/noise/HexRandomSizeNoise.java

@@ -24,6 +24,7 @@ public class HexRandomSizeNoise implements NoiseGenerator, OctaveNoise {
             {-1L, 1L},
             {0L, 1L}
     };
+    private static final ThreadLocal<HexScratch> SCRATCH = ThreadLocal.withInitial(HexScratch::new);
     private final long seed;
     private final SimplexNoise heatSimplex;
     private final SimplexNoise structureSimplex;
@@ -186,6 +187,9 @@ public class HexRandomSizeNoise implements NoiseGenerator, OctaveNoise {
     }
 
     private double sample(double x, double z) {
+        HexScratch scratch = SCRATCH.get();
+        double[] centersQ = scratch.centersQ;
+        double[] centersR = scratch.centersR;
         double qWorld = (SQRT_3_OVER_3 * x) - (z / 3.0);
         double rWorld = TWO_OVER_THREE * z;
         long[] rounded = roundAxial(qWorld, rWorld);
@@ -202,8 +206,6 @@ public class HexRandomSizeNoise implements NoiseGenerator, OctaveNoise {
                 return heat;
             }
 
-            double[] centersQ = new double[7];
-            double[] centersR = new double[7];
             int childIndex = pickChildIndex(localQ, localR, centersQ, centersR);
 
             if (childIndex < 0) {
@@ -250,4 +252,9 @@ public class HexRandomSizeNoise implements NoiseGenerator, OctaveNoise {
     public void setOctaves(int o) {
         this.octaves = Math.max(1, o);
     }
+
+    private static final class HexScratch {
+        private final double[] centersQ = new double[7];
+        private final double[] centersR = new double[7];
+    }
 }

core/src/main/java/art/arcane/iris/util/project/noise/NoiseGenerator.java

@@ -27,6 +27,18 @@ public interface NoiseGenerator {
 
     double noise(double x, double y, double z);
 
+    default double noiseSigned(double x) {
+        return (noise(x) * 2D) - 1D;
+    }
+
+    default double noiseSigned(double x, double z) {
+        return (noise(x, z) * 2D) - 1D;
+    }
+
+    default double noiseSigned(double x, double y, double z) {
+        return (noise(x, y, z) * 2D) - 1D;
+    }
+
     default boolean isStatic() {
         return false;
     }

core/src/main/java/art/arcane/iris/util/project/noise/OffsetNoiseGenerator.java

@@ -6,11 +6,31 @@ import org.jetbrains.annotations.NotNull;
 
 
 public class OffsetNoiseGenerator implements NoiseGenerator {
+    private static final int GENERIC = 0;
+    private static final int SIMPLEX = 1;
+    private static final int PERLIN = 2;
+    private static final int FRACTAL_FBM_SIMPLEX = 3;
+    private static final int VASCULAR = 4;
     private final NoiseGenerator base;
-    private final double ox, oz;
+    private final SimplexNoise simplexBase;
+    private final PerlinNoise perlinBase;
+    private final FractalFBMSimplexNoise fractalFbmSimplexBase;
+    private final VascularNoise vascularBase;
+    private final int dispatchKind;
+    private final double ox;
+    private final double oz;
 
     public OffsetNoiseGenerator(NoiseGenerator base, long seed) {
         this.base = base;
+        this.simplexBase = base instanceof SimplexNoise simplex ? simplex : null;
+        this.perlinBase = base instanceof PerlinNoise perlin ? perlin : null;
+        this.fractalFbmSimplexBase = base instanceof FractalFBMSimplexNoise fractal ? fractal : null;
+        this.vascularBase = base instanceof VascularNoise vascular ? vascular : null;
+        this.dispatchKind = simplexBase != null ? SIMPLEX
+                : perlinBase != null ? PERLIN
+                : fractalFbmSimplexBase != null ? FRACTAL_FBM_SIMPLEX
+                : vascularBase != null ? VASCULAR
+                : GENERIC;
         RNG rng = new RNG(seed);
         ox = rng.nextInt(Short.MIN_VALUE, Short.MAX_VALUE);
         oz = rng.nextInt(Short.MIN_VALUE, Short.MAX_VALUE);
@@ -18,17 +38,68 @@ public class OffsetNoiseGenerator implements NoiseGenerator {
 
     @Override
     public double noise(double x) {
-        return base.noise(x + ox);
+        return switch (dispatchKind) {
+            case SIMPLEX -> simplexBase.noise(x + ox);
+            case PERLIN -> perlinBase.noise(x + ox);
+            case FRACTAL_FBM_SIMPLEX -> fractalFbmSimplexBase.noise(x + ox);
+            case VASCULAR -> vascularBase.noise(x + ox);
+            default -> base.noise(x + ox);
+        };
+    }
+
+    @Override
+    public double noiseSigned(double x) {
+        return switch (dispatchKind) {
+            case SIMPLEX -> simplexBase.noiseSigned(x + ox);
+            case PERLIN -> perlinBase.noiseSigned(x + ox);
+            case FRACTAL_FBM_SIMPLEX -> fractalFbmSimplexBase.noiseSigned(x + ox);
+            case VASCULAR -> vascularBase.noiseSigned(x + ox);
+            default -> base.noiseSigned(x + ox);
+        };
     }
 
     @Override
     public double noise(double x, double z) {
-        return base.noise(x + ox, z + oz);
+        return switch (dispatchKind) {
+            case SIMPLEX -> simplexBase.noise(x + ox, z + oz);
+            case PERLIN -> perlinBase.noise(x + ox, z + oz);
+            case FRACTAL_FBM_SIMPLEX -> fractalFbmSimplexBase.noise(x + ox, z + oz);
+            case VASCULAR -> vascularBase.noise(x + ox, z + oz);
+            default -> base.noise(x + ox, z + oz);
+        };
+    }
+
+    @Override
+    public double noiseSigned(double x, double z) {
+        return switch (dispatchKind) {
+            case SIMPLEX -> simplexBase.noiseSigned(x + ox, z + oz);
+            case PERLIN -> perlinBase.noiseSigned(x + ox, z + oz);
+            case FRACTAL_FBM_SIMPLEX -> fractalFbmSimplexBase.noiseSigned(x + ox, z + oz);
+            case VASCULAR -> vascularBase.noiseSigned(x + ox, z + oz);
+            default -> base.noiseSigned(x + ox, z + oz);
+        };
     }
 
     @Override
     public double noise(double x, double y, double z) {
-        return base.noise(x + ox, y, z + oz);
+        return switch (dispatchKind) {
+            case SIMPLEX -> simplexBase.noise(x + ox, y, z + oz);
+            case PERLIN -> perlinBase.noise(x + ox, y, z + oz);
+            case FRACTAL_FBM_SIMPLEX -> fractalFbmSimplexBase.noise(x + ox, y, z + oz);
+            case VASCULAR -> vascularBase.noise(x + ox, y, z + oz);
+            default -> base.noise(x + ox, y, z + oz);
+        };
+    }
+
+    @Override
+    public double noiseSigned(double x, double y, double z) {
+        return switch (dispatchKind) {
+            case SIMPLEX -> simplexBase.noiseSigned(x + ox, y, z + oz);
+            case PERLIN -> perlinBase.noiseSigned(x + ox, y, z + oz);
+            case FRACTAL_FBM_SIMPLEX -> fractalFbmSimplexBase.noiseSigned(x + ox, y, z + oz);
+            case VASCULAR -> vascularBase.noiseSigned(x + ox, y, z + oz);
+            default -> base.noiseSigned(x + ox, y, z + oz);
+        };
     }
 
     @Override
@@ -45,4 +116,4 @@ public class OffsetNoiseGenerator implements NoiseGenerator {
     public NoiseGenerator getBase() {
         return base;
     }
-}
+}

core/src/main/java/art/arcane/iris/util/project/noise/PerlinNoise.java

@@ -51,6 +51,33 @@ public class PerlinNoise implements NoiseGenerator, OctaveNoise {
         return f(v / m);
     }
 
+    @Override
+    public double noiseSigned(double x) {
+        if (octaves <= 1) {
+            return n.GetPerlin(x, 0D);
+        }
+
+        double frequency = 1D;
+        double magnitude = 0D;
+        double value = 0D;
+
+        for (int i = 0; i < octaves; i++) {
+            double sampleFrequency;
+            if (frequency == 1D) {
+                sampleFrequency = frequency;
+                frequency = 2D;
+            } else {
+                frequency *= 2D;
+                sampleFrequency = frequency;
+            }
+
+            value += n.GetPerlin(x * sampleFrequency, 0D) * frequency;
+            magnitude += frequency;
+        }
+
+        return value / magnitude;
+    }
+
     @Override
     public double noise(double x, double z) {
         if (octaves <= 1) {
@@ -69,6 +96,26 @@ public class PerlinNoise implements NoiseGenerator, OctaveNoise {
         return f(v / m);
     }
 
+    @Override
+    public double noiseSigned(double x, double z) {
+        if (octaves <= 1) {
+            return n.GetPerlin(x, z);
+        }
+
+        double frequency = 1D;
+        double magnitude = 0D;
+        double value = 0D;
+
+        for (int i = 0; i < octaves; i++) {
+            double octaveFrequency = frequency == 1D ? frequency + 1D : frequency * 2D;
+            value += n.GetPerlin(x * octaveFrequency, z * octaveFrequency) * octaveFrequency;
+            magnitude += octaveFrequency;
+            frequency = octaveFrequency;
+        }
+
+        return value / magnitude;
+    }
+
     @Override
     public double noise(double x, double y, double z) {
         if (octaves <= 1) {
@@ -87,6 +134,26 @@ public class PerlinNoise implements NoiseGenerator, OctaveNoise {
         return f(v / m);
     }
 
+    @Override
+    public double noiseSigned(double x, double y, double z) {
+        if (octaves <= 1) {
+            return n.GetPerlin(x, y, z);
+        }
+
+        double frequency = 1D;
+        double magnitude = 0D;
+        double value = 0D;
+
+        for (int i = 0; i < octaves; i++) {
+            double octaveFrequency = frequency == 1D ? frequency + 1D : frequency * 2D;
+            value += n.GetPerlin(x * octaveFrequency, y * octaveFrequency, z * octaveFrequency) * octaveFrequency;
+            magnitude += octaveFrequency;
+            frequency = octaveFrequency;
+        }
+
+        return value / magnitude;
+    }
+
     @Override
     public void setOctaves(int o) {
         octaves = o;

core/src/main/java/art/arcane/iris/util/project/noise/SimplexNoise.java

@@ -51,6 +51,33 @@ public class SimplexNoise implements NoiseGenerator, OctaveNoise {
         return f(v / m);
     }
 
+    @Override
+    public double noiseSigned(double x) {
+        if (octaves <= 1) {
+            return n.GetSimplex(x, 0D);
+        }
+
+        double frequency = 1D;
+        double magnitude = 0D;
+        double value = 0D;
+
+        for (int i = 0; i < octaves; i++) {
+            double sampleFrequency;
+            if (frequency == 1D) {
+                sampleFrequency = frequency;
+                frequency = 2D;
+            } else {
+                frequency *= 2D;
+                sampleFrequency = frequency;
+            }
+
+            value += n.GetSimplex(x * sampleFrequency, 0D) * frequency;
+            magnitude += frequency;
+        }
+
+        return value / magnitude;
+    }
+
     @Override
     public double noise(double x, double z) {
         if (octaves <= 1) {
@@ -69,6 +96,26 @@ public class SimplexNoise implements NoiseGenerator, OctaveNoise {
         return f(v / m);
     }
 
+    @Override
+    public double noiseSigned(double x, double z) {
+        if (octaves <= 1) {
+            return n.GetSimplex(x, z);
+        }
+
+        double frequency = 1D;
+        double magnitude = 0D;
+        double value = 0D;
+
+        for (int i = 0; i < octaves; i++) {
+            double octaveFrequency = frequency == 1D ? frequency + 1D : frequency * 2D;
+            value += n.GetSimplex(x * octaveFrequency, z * octaveFrequency) * octaveFrequency;
+            magnitude += octaveFrequency;
+            frequency = octaveFrequency;
+        }
+
+        return value / magnitude;
+    }
+
     @Override
     public double noise(double x, double y, double z) {
         if (octaves <= 1) {
@@ -87,6 +134,26 @@ public class SimplexNoise implements NoiseGenerator, OctaveNoise {
         return f(v / m);
     }
 
+    @Override
+    public double noiseSigned(double x, double y, double z) {
+        if (octaves <= 1) {
+            return n.GetSimplex(x, y, z);
+        }
+
+        double frequency = 1D;
+        double magnitude = 0D;
+        double value = 0D;
+
+        for (int i = 0; i < octaves; i++) {
+            double octaveFrequency = frequency == 1D ? frequency + 1D : frequency * 2D;
+            value += n.GetSimplex(x * octaveFrequency, y * octaveFrequency, z * octaveFrequency) * octaveFrequency;
+            magnitude += octaveFrequency;
+            frequency = octaveFrequency;
+        }
+
+        return value / magnitude;
+    }
+
     @Override
     public void setOctaves(int o) {
         octaves = o;

core/src/main/java/art/arcane/iris/util/project/noise/VascularNoise.java

@@ -18,7 +18,6 @@
 
 package art.arcane.iris.util.project.noise;
 
-import art.arcane.volmlib.util.math.M;
 import art.arcane.volmlib.util.math.RNG;
 
 public class VascularNoise implements NoiseGenerator {
@@ -32,7 +31,20 @@ public class VascularNoise implements NoiseGenerator {
     }
 
     private double filter(double noise) {
-        return M.clip((noise / 2D) + 0.5D, 0D, 1D);
+        double normalized = (noise * 0.5D) + 0.5D;
+        if (normalized < 0D) {
+            return 0D;
+        }
+
+        return normalized > 1D ? 1D : normalized;
+    }
+
+    private double filterSigned(double noise) {
+        if (noise < -1D) {
+            return -1D;
+        }
+
+        return noise > 1D ? 1D : noise;
     }
 
     @Override
@@ -40,13 +52,28 @@ public class VascularNoise implements NoiseGenerator {
         return filter(n.GetCellular(x, 0));
     }
 
+    @Override
+    public double noiseSigned(double x) {
+        return filterSigned(n.GetCellular(x, 0D));
+    }
+
     @Override
     public double noise(double x, double z) {
         return filter(n.GetCellular(x, z));
     }
 
+    @Override
+    public double noiseSigned(double x, double z) {
+        return filterSigned(n.GetCellular(x, z));
+    }
+
     @Override
     public double noise(double x, double y, double z) {
         return filter(n.GetCellular(x, y, z));
     }
+
+    @Override
+    public double noiseSigned(double x, double y, double z) {
+        return filterSigned(n.GetCellular(x, y, z));
+    }
 }

core/src/main/java/art/arcane/iris/util/project/stream/ProceduralStream.java

@@ -281,6 +281,11 @@ public interface ProceduralStream<T> extends ProceduralLayer, Interpolated<T> {
         return new CachedStream2D<T>(name, engine, this, size);
     }
 
+    @SuppressWarnings("unchecked")
+    default ProceduralStream<Double> cache2DDouble(String name, Engine engine, int size) {
+        return new CachedDoubleStream2D(name, engine, (ProceduralStream<Double>) this, size);
+    }
+
     default ProceduralStream<T> cache3D(String name, Engine engine, int maxSize) {
         return new CachedStream3D<T>(name, engine, this, maxSize);
     }

core/src/main/java/art/arcane/iris/util/project/stream/utility/CachedDoubleStream2D.java

@@ -0,0 +1,76 @@
+package art.arcane.iris.util.project.stream.utility;
+
+import art.arcane.iris.Iris;
+import art.arcane.iris.core.service.PreservationSVC;
+import art.arcane.iris.engine.framework.Engine;
+import art.arcane.iris.engine.framework.MeteredCache;
+import art.arcane.iris.util.project.stream.BasicStream;
+import art.arcane.iris.util.project.stream.ProceduralStream;
+import art.arcane.volmlib.util.cache.WorldCache2DDouble;
+import art.arcane.volmlib.util.data.KCache;
+
+public class CachedDoubleStream2D extends BasicStream<Double> implements ProceduralStream<Double>, MeteredCache, ChunkFillableStream2D {
+    private final ProceduralStream<Double> stream;
+    private final WorldCache2DDouble cache;
+    private final Engine engine;
+
+    public CachedDoubleStream2D(String name, Engine engine, ProceduralStream<Double> stream, int size) {
+        super();
+        this.stream = stream;
+        this.engine = engine;
+        this.cache = new WorldCache2DDouble((x, z) -> stream.getDouble(x, z), size);
+        Iris.service(PreservationSVC.class).registerCache(this);
+    }
+
+    @Override
+    public double toDouble(Double t) {
+        return t;
+    }
+
+    @Override
+    public Double fromDouble(double d) {
+        return d;
+    }
+
+    @Override
+    public Double get(double x, double z) {
+        return cache.get((int) x, (int) z);
+    }
+
+    @Override
+    public Double get(double x, double y, double z) {
+        return stream.get(x, y, z);
+    }
+
+    @Override
+    public double getDouble(double x, double z) {
+        return cache.get((int) x, (int) z);
+    }
+
+    @Override
+    public long getSize() {
+        return cache.getSize();
+    }
+
+    @Override
+    public KCache<?, ?> getRawCache() {
+        return null;
+    }
+
+    @Override
+    public long getMaxSize() {
+        return cache.getMaxSize();
+    }
+
+    @Override
+    public boolean isClosed() {
+        return engine.isClosed();
+    }
+
+    @Override
+    public void fillChunkRaw(int worldX, int worldZ, Object[] target) {
+        int chunkX = worldX >> 4;
+        int chunkZ = worldZ >> 4;
+        cache.fillChunk(chunkX, chunkZ, target);
+    }
+}

core/src/main/java/art/arcane/iris/util/project/stream/utility/CachedStream2D.java

@@ -27,7 +27,7 @@ import art.arcane.volmlib.util.cache.WorldCache2D;
 import art.arcane.volmlib.util.data.KCache;
 import art.arcane.iris.util.project.stream.BasicStream;
 import art.arcane.iris.util.project.stream.ProceduralStream;
-public class CachedStream2D<T> extends BasicStream<T> implements ProceduralStream<T>, MeteredCache {
+public class CachedStream2D<T> extends BasicStream<T> implements ProceduralStream<T>, MeteredCache, ChunkFillableStream2D {
     private final ProceduralStream<T> stream;
     private final WorldCache2D<T> cache;
     private final Engine engine;
@@ -81,7 +81,7 @@ public class CachedStream2D<T> extends BasicStream<T> implements ProceduralStrea
         return engine.isClosed();
     }
 
-    public void fillChunk(int worldX, int worldZ, Object[] target) {
+    public void fillChunkRaw(int worldX, int worldZ, Object[] target) {
         int chunkX = worldX >> 4;
         int chunkZ = worldZ >> 4;
         cache.fillChunk(chunkX, chunkZ, target);

core/src/main/java/art/arcane/iris/util/project/stream/utility/ChunkFillableStream2D.java

@@ -0,0 +1,5 @@
+package art.arcane.iris.util.project.stream.utility;
+
+public interface ChunkFillableStream2D {
+    void fillChunkRaw(int worldX, int worldZ, Object[] target);
+}

core/src/test/java/art/arcane/iris/core/pregenerator/IrisPregeneratorInitTest.java

@@ -0,0 +1,141 @@
+package art.arcane.iris.core.pregenerator;
+
+import art.arcane.iris.core.IrisSettings;
+import art.arcane.volmlib.util.mantle.runtime.Mantle;
+import art.arcane.volmlib.util.math.Position2;
+import org.junit.Test;
+
+import java.lang.reflect.Method;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import static org.junit.Assert.assertEquals;
+
+public class IrisPregeneratorInitTest {
+    @Test
+    public void initDoesNotSaveBeforeGenerationStarts() throws Exception {
+        IrisSettings previousSettings = IrisSettings.settings;
+        IrisSettings.settings = new IrisSettings();
+        TrackingPregeneratorMethod method = new TrackingPregeneratorMethod();
+        PregenTask task = PregenTask.builder()
+                .center(new Position2(0, 0))
+                .radiusX(16)
+                .radiusZ(16)
+                .build();
+        try {
+            IrisPregenerator pregenerator = new IrisPregenerator(task, method, new NoOpPregenListener());
+            Method initMethod = IrisPregenerator.class.getDeclaredMethod("init");
+            initMethod.setAccessible(true);
+
+            initMethod.invoke(pregenerator);
+
+            assertEquals(1, method.initCalls.get());
+            assertEquals(0, method.saveCalls.get());
+        } finally {
+            IrisSettings.settings = previousSettings;
+        }
+    }
+
+    private static final class TrackingPregeneratorMethod implements PregeneratorMethod {
+        private final AtomicInteger initCalls = new AtomicInteger();
+        private final AtomicInteger saveCalls = new AtomicInteger();
+
+        @Override
+        public void init() {
+            initCalls.incrementAndGet();
+        }
+
+        @Override
+        public void close() {
+        }
+
+        @Override
+        public void save() {
+            saveCalls.incrementAndGet();
+        }
+
+        @Override
+        public boolean supportsRegions(int x, int z, PregenListener listener) {
+            return false;
+        }
+
+        @Override
+        public String getMethod(int x, int z) {
+            return "test";
+        }
+
+        @Override
+        public void generateRegion(int x, int z, PregenListener listener) {
+        }
+
+        @Override
+        public void generateChunk(int x, int z, PregenListener listener) {
+        }
+
+        @Override
+        public Mantle getMantle() {
+            return null;
+        }
+    }
+
+    private static final class NoOpPregenListener implements PregenListener {
+        @Override
+        public void onTick(double chunksPerSecond, double chunksPerMinute, double regionsPerMinute, double percent, long generated, long totalChunks, long chunksRemaining, long eta, long elapsed, String method, boolean cached) {
+        }
+
+        @Override
+        public void onChunkGenerating(int x, int z) {
+        }
+
+        @Override
+        public void onChunkGenerated(int x, int z, boolean cached) {
+        }
+
+        @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/test/java/art/arcane/iris/core/pregenerator/methods/AsyncPregenMethodConcurrencyCapTest.java

@@ -29,4 +29,16 @@ public class AsyncPregenMethodConcurrencyCapTest {
         assertEquals(16, AsyncPregenMethod.applyRuntimeConcurrencyCap(256, false, 8));
         assertEquals(20, AsyncPregenMethod.applyRuntimeConcurrencyCap(20, false, 40));
     }
+
+    @Test
+    public void paperLikeConcurrencyUsesChunkWorkerPoolWhenAvailable() {
+        assertEquals(4, AsyncPregenMethod.resolvePaperLikeConcurrencyWorkerThreads(4, 16, 32));
+        assertEquals(24, AsyncPregenMethod.resolvePaperLikeConcurrencyWorkerThreads(-1, 16, 24));
+    }
+
+    @Test
+    public void foliaConcurrencyStillUsesBroaderRuntimeCapacity() {
+        assertEquals(32, AsyncPregenMethod.resolveFoliaConcurrencyWorkerThreads(4, 16, 32));
+        assertEquals(16, AsyncPregenMethod.resolveFoliaConcurrencyWorkerThreads(-1, 16, 12));
+    }
 }

core/src/test/java/art/arcane/iris/core/service/IrisEngineSVCTest.java

@@ -0,0 +1,24 @@
+package art.arcane.iris.core.service;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class IrisEngineSVCTest {
+    @Test
+    public void maintenanceSkipsReductionWhenPregenDoesNotTargetWorld() {
+        assertTrue(IrisEngineSVC.shouldSkipMantleReductionForMaintenance(true, false));
+    }
+
+    @Test
+    public void maintenanceDoesNotSkipReductionForActivePregenWorld() {
+        assertFalse(IrisEngineSVC.shouldSkipMantleReductionForMaintenance(true, true));
+    }
+
+    @Test
+    public void noMaintenanceNeverSkipsReduction() {
+        assertFalse(IrisEngineSVC.shouldSkipMantleReductionForMaintenance(false, false));
+        assertFalse(IrisEngineSVC.shouldSkipMantleReductionForMaintenance(false, true));
+    }
+}

core/src/test/java/art/arcane/iris/engine/object/IrisMathNoiseHotPathParityTest.java

@@ -0,0 +1,67 @@
+package art.arcane.iris.engine.object;
+
+import art.arcane.iris.util.project.interpolation.InterpolationMethod3D;
+import art.arcane.iris.util.project.interpolation.IrisInterpolation;
+import art.arcane.iris.util.project.noise.HexJamesNoise;
+import art.arcane.iris.util.project.noise.HexRandomSizeNoise;
+import art.arcane.volmlib.util.collection.KList;
+import art.arcane.volmlib.util.function.NoiseProvider3;
+import art.arcane.volmlib.util.math.RNG;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class IrisMathNoiseHotPathParityTest {
+    @Test
+    public void hexNoiseSamplesRemainBitExact() {
+        HexRandomSizeNoise randomSize = new HexRandomSizeNoise(12345L);
+        HexJamesNoise james = new HexJamesNoise(54321L);
+
+        assertEquals(0.4670864519829246D, randomSize.noise(12.5D, -8.25D), 0D);
+        assertEquals(0.4935590260372404D, randomSize.noise(-31.75D, 44.5D, 9.125D), 0D);
+        assertEquals(0.5185375921658786D, james.noise(12.5D, -8.25D), 0D);
+        assertEquals(0.4557738681128938D, james.noise(-31.75D, 44.5D, 9.125D), 0D);
+    }
+
+    @Test
+    public void generatorNoiseSamplesRemainBitExact() {
+        IrisNoiseGenerator noiseGenerator = new IrisNoiseGenerator()
+                .setZoom(7.25D)
+                .setOffsetX(1.75D)
+                .setOffsetZ(-3.5D)
+                .setOpacity(0.82D)
+                .setStyle(NoiseStyle.PERLIN_IRIS.style())
+                .setExponent(1.15D);
+
+        assertEquals(0.3886291844359823D, noiseGenerator.getNoise(9988L, 31.25D, -17.5D, null), 0D);
+
+        IrisGeneratorStyle style = NoiseStyle.IRIS_DOUBLE.style();
+        assertEquals(0.8640377573263068D, style.createNoCache(new RNG(112233L), null).noiseFast2D(42.5D, -19.75D), 0D);
+
+        IrisGenerator generator = new IrisGenerator()
+                .setZoom(9.5D)
+                .setOpacity(0.91D)
+                .setComposite(new KList<IrisNoiseGenerator>().qadd(noiseGenerator));
+
+        assertEquals(0.451949817597527D, generator.getHeight(63.0D, -27.0D, 445566L), 0D);
+    }
+
+    @Test
+    public void interpolationSamplesRemainBitExact() {
+        NoiseProvider3 provider = (x, y, z) -> {
+            double angle = (x * 0.017D) + (y * 0.011D) + (z * 0.023D);
+            return 0.5D + (Math.sin(angle) * 0.25D);
+        };
+
+        assertEquals(
+                0.5231950552025616D,
+                IrisInterpolation.getNoise3D(InterpolationMethod3D.TRILINEAR, 5, 7, -3, 2.5D, 3.5D, 4.5D, provider),
+                0D
+        );
+        assertEquals(
+                0.5259208842929466D,
+                IrisInterpolation.getNoise3D(InterpolationMethod3D.TRICUBIC, 5, 7, -3, 2.5D, 3.5D, 4.5D, provider),
+                0D
+        );
+    }
+}

core/src/test/java/art/arcane/iris/util/project/noise/CNGFastPathParityTest.java

@@ -27,6 +27,16 @@ public class CNGFastPathParityTest {
         }
     }
 
+    @Test
+    public void signedFastPathMatchesLegacyAcrossRepresentativeGenerators() {
+        for (long seed = 31L; seed <= 35L; seed++) {
+            List<CNG> generators = createSignedGenerators(seed);
+            for (int index = 0; index < generators.size(); index++) {
+                assertSignedFastPathParity("signed-seed-" + seed + "-case-" + index, generators.get(index));
+            }
+        }
+    }
+
     private void assertFastPathParity(String label, CNG generator) {
         for (int x = -320; x <= 320; x += 19) {
             for (int z = -320; z <= 320; z += 23) {
@@ -47,6 +57,26 @@ public class CNGFastPathParityTest {
         }
     }
 
+    private void assertSignedFastPathParity(String label, CNG generator) {
+        for (int x = -320; x <= 320; x += 19) {
+            for (int z = -320; z <= 320; z += 23) {
+                double expected = (generator.noiseFast2D(x, z) * 2D) - 1D;
+                double actual = generator.noiseFastSigned2D(x, z);
+                assertEquals(label + " signed-2D x=" + x + " z=" + z, expected, actual, 1.0E-12D);
+            }
+        }
+
+        for (int x = -128; x <= 128; x += 17) {
+            for (int y = -96; y <= 96; y += 13) {
+                for (int z = -128; z <= 128; z += 19) {
+                    double expected = (generator.noiseFast3D(x, y, z) * 2D) - 1D;
+                    double actual = generator.noiseFastSigned3D(x, y, z);
+                    assertEquals(label + " signed-3D x=" + x + " y=" + y + " z=" + z, expected, actual, 1.0E-12D);
+                }
+            }
+        }
+    }
+
     private CNG createIdentityGenerator(long seed) {
         DeterministicNoiseGenerator generator = new DeterministicNoiseGenerator(0.31D + (seed * 0.01D));
         return new CNG(new RNG(seed), generator, 1D, 1).bake();
@@ -72,6 +102,24 @@ public class CNGFastPathParityTest {
         return generators;
     }
 
+    private List<CNG> createSignedGenerators(long seed) {
+        List<CNG> generators = new ArrayList<>();
+
+        generators.add(new CNG(new RNG(seed), new SimplexNoise(seed + 100L), 1D, 1).bake());
+        generators.add(new CNG(new RNG(seed + 1L), new FractalFBMSimplexNoise(seed + 101L), 1D, 1).bake());
+        generators.add(new CNG(new RNG(seed + 2L), new VascularNoise(seed + 102L), 1D, 1).bake());
+        generators.add(new CNG(new RNG(seed + 3L), new OffsetNoiseGenerator(new SimplexNoise(seed + 103L), seed + 104L), 1D, 1).bake());
+        generators.add(new CNG(new RNG(seed + 4L), new OffsetNoiseGenerator(new PerlinNoise(seed + 107L), seed + 108L), 1D, 1).bake());
+        generators.add(new CNG(new RNG(seed + 5L), new OffsetNoiseGenerator(new VascularNoise(seed + 109L), seed + 110L), 1D, 1).bake());
+        generators.add(new CNG(new RNG(seed + 6L), new OffsetNoiseGenerator(new FractalFBMSimplexNoise(seed + 111L), seed + 112L), 1D, 1).bake());
+
+        CNG fractured = new CNG(new RNG(seed + 7L), new OffsetNoiseGenerator(new FractalFBMSimplexNoise(seed + 105L), seed + 106L), 1D, 1).bake();
+        fractured.fractureWith(createIdentityGenerator(seed + 500L), 9.5D);
+        generators.add(fractured);
+
+        return generators;
+    }
+
     private static class DeterministicNoiseGenerator implements NoiseGenerator {
         private final double offset;
 

core/src/test/java/art/arcane/iris/util/project/noise/FastNoiseDoubleCellularParityTest.java

@@ -0,0 +1,183 @@
+package art.arcane.iris.util.project.noise;
+
+import org.junit.Test;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+
+import static org.junit.Assert.assertEquals;
+
+public class FastNoiseDoubleCellularParityTest {
+    private static final FastNoiseDouble.CellularDistanceFunction[] DISTANCE_FUNCTIONS = new FastNoiseDouble.CellularDistanceFunction[]{
+            FastNoiseDouble.CellularDistanceFunction.Euclidean,
+            FastNoiseDouble.CellularDistanceFunction.Manhattan,
+            FastNoiseDouble.CellularDistanceFunction.Natural
+    };
+    private static final FastNoiseDouble.CellularReturnType[] TWO_EDGE_RETURN_TYPES = new FastNoiseDouble.CellularReturnType[]{
+            FastNoiseDouble.CellularReturnType.Distance2,
+            FastNoiseDouble.CellularReturnType.Distance2Add,
+            FastNoiseDouble.CellularReturnType.Distance2Sub,
+            FastNoiseDouble.CellularReturnType.Distance2Mul,
+            FastNoiseDouble.CellularReturnType.Distance2Div
+    };
+    private static final Method HASH_2D = getDeclaredMethod("hash2D", long.class, long.class, long.class);
+    private static final Method HASH_3D = getDeclaredMethod("hash3D", long.class, long.class, long.class, long.class);
+    private static final double[] CELL_2D_X = getDeclaredDoubleArray("CELL_2D_X");
+    private static final double[] CELL_2D_Y = getDeclaredDoubleArray("CELL_2D_Y");
+    private static final double[] CELL_3D_X = getDeclaredDoubleArray("CELL_3D_X");
+    private static final double[] CELL_3D_Y = getDeclaredDoubleArray("CELL_3D_Y");
+    private static final double[] CELL_3D_Z = getDeclaredDoubleArray("CELL_3D_Z");
+
+    @Test
+    public void cellular2DTwoEdgeModesMatchLegacyUpdateLogic() throws Exception {
+        for (long seed = 11L; seed <= 17L; seed++) {
+            double frequency = 0.037D + (seed * 0.001D);
+            for (FastNoiseDouble.CellularDistanceFunction distanceFunction : DISTANCE_FUNCTIONS) {
+                for (FastNoiseDouble.CellularReturnType returnType : TWO_EDGE_RETURN_TYPES) {
+                    FastNoiseDouble noise = new FastNoiseDouble(seed);
+                    noise.setFrequency(frequency);
+                    noise.setCellularDistanceFunction(distanceFunction);
+                    noise.setCellularReturnType(returnType);
+                    for (int x = -96; x <= 96; x += 11) {
+                        for (int y = -96; y <= 96; y += 13) {
+                            double sampleX = x + 0.37D;
+                            double sampleY = y - 0.41D;
+                            double expected = legacyGetCellular2D(seed, frequency, distanceFunction, returnType, sampleX, sampleY);
+                            double actual = noise.GetCellular(sampleX, sampleY);
+                            assertEquals("2D seed=" + seed + " distance=" + distanceFunction + " return=" + returnType + " x=" + sampleX + " y=" + sampleY, expected, actual, 0D);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    @Test
+    public void cellular3DTwoEdgeModesMatchLegacyUpdateLogic() throws Exception {
+        for (long seed = 31L; seed <= 35L; seed++) {
+            double frequency = 0.029D + (seed * 0.001D);
+            for (FastNoiseDouble.CellularDistanceFunction distanceFunction : DISTANCE_FUNCTIONS) {
+                for (FastNoiseDouble.CellularReturnType returnType : TWO_EDGE_RETURN_TYPES) {
+                    FastNoiseDouble noise = new FastNoiseDouble(seed);
+                    noise.setFrequency(frequency);
+                    noise.setCellularDistanceFunction(distanceFunction);
+                    noise.setCellularReturnType(returnType);
+                    for (int x = -48; x <= 48; x += 9) {
+                        for (int y = -32; y <= 32; y += 7) {
+                            for (int z = -48; z <= 48; z += 11) {
+                                double sampleX = x + 0.19D;
+                                double sampleY = y - 0.27D;
+                                double sampleZ = z + 0.43D;
+                                double expected = legacyGetCellular3D(seed, frequency, distanceFunction, returnType, sampleX, sampleY, sampleZ);
+                                double actual = noise.GetCellular(sampleX, sampleY, sampleZ);
+                                assertEquals("3D seed=" + seed + " distance=" + distanceFunction + " return=" + returnType + " x=" + sampleX + " y=" + sampleY + " z=" + sampleZ, expected, actual, 0D);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private double legacyGetCellular2D(long seed, double frequency, FastNoiseDouble.CellularDistanceFunction distanceFunction, FastNoiseDouble.CellularReturnType returnType, double x, double y) throws Exception {
+        double scaledX = x * frequency;
+        double scaledY = y * frequency;
+        long xr = fastRound(scaledX);
+        long yr = fastRound(scaledY);
+        double distance = 999999D;
+        double distance2 = 999999D;
+
+        for (long xi = xr - 1; xi <= xr + 1; xi++) {
+            for (long yi = yr - 1; yi <= yr + 1; yi++) {
+                int cellIndex = (int) hash2D(seed, xi, yi) & 255;
+                double vecX = xi - scaledX + CELL_2D_X[cellIndex];
+                double vecY = yi - scaledY + CELL_2D_Y[cellIndex];
+                double newDistance = switch (distanceFunction) {
+                    case Euclidean -> vecX * vecX + vecY * vecY;
+                    case Manhattan -> Math.abs(vecX) + Math.abs(vecY);
+                    case Natural -> (Math.abs(vecX) + Math.abs(vecY)) + (vecX * vecX + vecY * vecY);
+                };
+                distance2 = Math.max(Math.min(distance2, newDistance), distance);
+                distance = Math.min(distance, newDistance);
+            }
+        }
+
+        return applyTwoEdgeReturn(distance, distance2, returnType);
+    }
+
+    private double legacyGetCellular3D(long seed, double frequency, FastNoiseDouble.CellularDistanceFunction distanceFunction, FastNoiseDouble.CellularReturnType returnType, double x, double y, double z) throws Exception {
+        double scaledX = x * frequency;
+        double scaledY = y * frequency;
+        double scaledZ = z * frequency;
+        long xr = fastRound(scaledX);
+        long yr = fastRound(scaledY);
+        long zr = fastRound(scaledZ);
+        double distance = 999999D;
+        double distance2 = 999999D;
+
+        for (long xi = xr - 1; xi <= xr + 1; xi++) {
+            for (long yi = yr - 1; yi <= yr + 1; yi++) {
+                for (long zi = zr - 1; zi <= zr + 1; zi++) {
+                    int cellIndex = (int) hash3D(seed, xi, yi, zi) & 255;
+                    double vecX = xi - scaledX + CELL_3D_X[cellIndex];
+                    double vecY = yi - scaledY + CELL_3D_Y[cellIndex];
+                    double vecZ = zi - scaledZ + CELL_3D_Z[cellIndex];
+                    double newDistance = switch (distanceFunction) {
+                        case Euclidean -> vecX * vecX + vecY * vecY + vecZ * vecZ;
+                        case Manhattan -> Math.abs(vecX) + Math.abs(vecY) + Math.abs(vecZ);
+                        case Natural -> (Math.abs(vecX) + Math.abs(vecY) + Math.abs(vecZ)) + (vecX * vecX + vecY * vecY + vecZ * vecZ);
+                    };
+                    distance2 = Math.max(Math.min(distance2, newDistance), distance);
+                    distance = Math.min(distance, newDistance);
+                }
+            }
+        }
+
+        return applyTwoEdgeReturn(distance, distance2, returnType);
+    }
+
+    private double applyTwoEdgeReturn(double distance, double distance2, FastNoiseDouble.CellularReturnType returnType) {
+        return switch (returnType) {
+            case Distance2 -> distance2 - 1D;
+            case Distance2Add -> distance2 + distance - 1D;
+            case Distance2Sub -> distance2 - distance - 1D;
+            case Distance2Mul -> distance2 * distance - 1D;
+            case Distance2Div -> distance / distance2 - 1D;
+            default -> 0D;
+        };
+    }
+
+    private static long fastRound(double value) {
+        return value >= 0D ? (long) (value + 0.5D) : (long) (value - 0.5D);
+    }
+
+    private static long hash2D(long seed, long x, long y) throws Exception {
+        Long value = (Long) HASH_2D.invoke(null, seed, x, y);
+        return value.longValue();
+    }
+
+    private static long hash3D(long seed, long x, long y, long z) throws Exception {
+        Long value = (Long) HASH_3D.invoke(null, seed, x, y, z);
+        return value.longValue();
+    }
+
+    private static Method getDeclaredMethod(String name, Class<?>... parameterTypes) {
+        try {
+            Method method = FastNoiseDouble.class.getDeclaredMethod(name, parameterTypes);
+            method.setAccessible(true);
+            return method;
+        } catch (ReflectiveOperationException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    private static double[] getDeclaredDoubleArray(String name) {
+        try {
+            Field field = FastNoiseDouble.class.getDeclaredField(name);
+            field.setAccessible(true);
+            return (double[]) field.get(null);
+        } catch (ReflectiveOperationException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+}