diff --git a/src/main/java/com/volmit/iris/engine/IrisEngine.java b/src/main/java/com/volmit/iris/engine/IrisEngine.java
index 427028127..8604b229c 100644
--- a/src/main/java/com/volmit/iris/engine/IrisEngine.java
+++ b/src/main/java/com/volmit/iris/engine/IrisEngine.java
@@ -19,6 +19,7 @@
 package com.volmit.iris.engine;
 
 import com.volmit.iris.Iris;
+import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.engine.framework.*;
 import com.volmit.iris.engine.hunk.Hunk;
 import com.volmit.iris.engine.object.IrisBiome;
@@ -26,7 +27,11 @@ import com.volmit.iris.engine.object.IrisBiomePaletteLayer;
 import com.volmit.iris.engine.object.IrisDecorator;
 import com.volmit.iris.engine.object.IrisObjectPlacement;
 import com.volmit.iris.engine.parallel.BurstExecutor;
+import com.volmit.iris.util.collection.KList;
+import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.documentation.ChunkCoordinates;
+import com.volmit.iris.util.format.C;
+import com.volmit.iris.util.format.Form;
 import com.volmit.iris.util.math.RNG;
 import com.volmit.iris.util.scheduling.J;
 import com.volmit.iris.util.scheduling.PrecisionStopwatch;
@@ -158,44 +163,63 @@ public class IrisEngine extends BlockPopulator implements Engine {
 
     @ChunkCoordinates
     @Override
-    public void generate(int x, int z, Hunk<BlockData> vblocks, Hunk<Biome> vbiomes) {
+    public void generate(int x, int z, Hunk<BlockData> vblocks, Hunk<Biome> vbiomes, boolean multicore) {
         try {
             PrecisionStopwatch p = PrecisionStopwatch.start();
             Hunk<BlockData> blocks = vblocks.listen((xx, y, zz, t) -> catchBlockUpdates(x + xx, y + getMinHeight(), z + zz, t));
+            PrecisionStopwatch px = PrecisionStopwatch.start();
 
-            // This is a very weird optimization, but it works
-            // Basically we precache multicore the biome stream which effectivley
-            // makes the biome stream, interpolation & noise engine run in parallel without mca
-            BurstExecutor b = burst().burst(16);
+            if(multicore)
+            {
+                BurstExecutor b = burst().burst(16);
+                for (int i = 0; i < vblocks.getWidth(); i++) {
+                    int finalI = i;
+                    b.queue(() -> {
+                        for (int j = 0; j < vblocks.getDepth(); j++) {
+                            getFramework().getComplex().getTrueBiomeStream().get(x + finalI, z + j);
+                            getFramework().getComplex().getTrueHeightStream().get(x + finalI, z + j);
+                        }
+                    });
+                }
 
-            for (int i = 0; i < vblocks.getWidth(); i++) {
-                int finalI = i;
-                b.queue(() -> {
-                    for (int j = 0; j < vblocks.getDepth(); j++) {
-                        getFramework().getComplex().getTrueBiomeStream().get(x + finalI, z + j);
-                    }
-                });
+                b.complete();
             }
 
-            b.complete();
+            getMetrics().getPrecache().put(px.getMilliseconds());
 
             switch (getDimension().getTerrainMode()) {
                 case NORMAL -> {
                     getFramework().getEngineParallax().generateParallaxArea(x >> 4, z >> 4);
-                    getFramework().getTerrainActuator().actuate(x, z, vblocks);
-                    getFramework().getBiomeActuator().actuate(x, z, vbiomes);
-                    getFramework().getCaveModifier().modify(x, z, vblocks);
-                    getFramework().getRavineModifier().modify(x, z, vblocks);
-                    getFramework().getPostModifier().modify(x, z, vblocks);
-                    getFramework().getDecorantActuator().actuate(x, z, blocks);
+                    getFramework().getTerrainActuator().actuate(x, z, vblocks, multicore);
+                    getFramework().getBiomeActuator().actuate(x, z, vbiomes, multicore);
+                    getFramework().getCaveModifier().modify(x, z, vblocks, multicore);
+                    getFramework().getRavineModifier().modify(x, z, vblocks, multicore);
+                    getFramework().getPostModifier().modify(x, z, vblocks, multicore);
+                    getFramework().getDecorantActuator().actuate(x, z, blocks, multicore);
                     getFramework().getEngineParallax().insertParallax(x >> 4, z >> 4, blocks);
-                    getFramework().getDepositModifier().modify(x, z, blocks);
+                    getFramework().getDepositModifier().modify(x, z, blocks, multicore);
                 }
                 case ISLANDS -> {
-                    getFramework().getTerrainActuator().actuate(x, z, vblocks);
+                    getFramework().getTerrainActuator().actuate(x, z, vblocks, multicore);
                 }
             }
             getMetrics().getTotal().put(p.getMilliseconds());
+
+            if(IrisSettings.get().getGeneral().isDebug())
+            {
+                KList<String> v = new KList<>();
+                KMap<String, Double> g = getMetrics().pull();
+
+                for(String i : g.sortKNumber())
+                {
+                    if(g.get(i) != null)
+                    {
+                        v.add(C.RESET + "" + C.LIGHT_PURPLE + i + ": " + C.UNDERLINE + C.BLUE + Form.duration(g.get(i), 0) + C.RESET + C.GRAY + "");
+                    }
+                }
+
+                Iris.debug(v.toString(", "));
+            }
         } catch (Throwable e) {
             Iris.reportError(e);
             fail("Failed to generate " + x + ", " + z, e);
diff --git a/src/main/java/com/volmit/iris/engine/IrisEngineCompound.java b/src/main/java/com/volmit/iris/engine/IrisEngineCompound.java
index df3ade035..85ab10d2a 100644
--- a/src/main/java/com/volmit/iris/engine/IrisEngineCompound.java
+++ b/src/main/java/com/volmit/iris/engine/IrisEngineCompound.java
@@ -213,11 +213,11 @@ public class IrisEngineCompound implements EngineCompound {
     }
 
     @Override
-    public void generate(int x, int z, Hunk<BlockData> blocks, Hunk<BlockData> postblocks, Hunk<Biome> biomes) {
+    public void generate(int x, int z, Hunk<BlockData> blocks, Hunk<BlockData> postblocks, Hunk<Biome> biomes, boolean multicore) {
         recycle();
         PrecisionStopwatch p = PrecisionStopwatch.start();
         if (engines.length == 1 && !getEngine(0).getTarget().isInverted()) {
-            engines[0].generate(x, z, blocks, biomes);
+            engines[0].generate(x, z, blocks, biomes, multicore);
         } else {
             int i;
             int offset = 0;
@@ -234,7 +234,7 @@ public class IrisEngineCompound implements EngineCompound {
                     cbiome = cbiome.invertY();
                 }
 
-                engine.generate(x, z, cblock, cbiome);
+                engine.generate(x, z, cblock, cbiome, multicore);
                 blocks.insert(0, doffset, 0, cblock);
                 biomes.insert(0, doffset, 0, cbiome);
                 offset += height;
diff --git a/src/main/java/com/volmit/iris/engine/actuator/IrisBiomeActuator.java b/src/main/java/com/volmit/iris/engine/actuator/IrisBiomeActuator.java
index 796eaaf9b..fc9f304e4 100644
--- a/src/main/java/com/volmit/iris/engine/actuator/IrisBiomeActuator.java
+++ b/src/main/java/com/volmit/iris/engine/actuator/IrisBiomeActuator.java
@@ -63,7 +63,7 @@ public class IrisBiomeActuator extends EngineAssignedActuator<Biome> {
 
     @BlockCoordinates
     @Override
-    public void onActuate(int x, int z, Hunk<Biome> h) {
+    public void onActuate(int x, int z, Hunk<Biome> h, boolean multicore) {
         PrecisionStopwatch p = PrecisionStopwatch.start();
         int zf, maxHeight;
         IrisBiome ib;
diff --git a/src/main/java/com/volmit/iris/engine/actuator/IrisDecorantActuator.java b/src/main/java/com/volmit/iris/engine/actuator/IrisDecorantActuator.java
index c422c2fa7..16cf9e3a0 100644
--- a/src/main/java/com/volmit/iris/engine/actuator/IrisDecorantActuator.java
+++ b/src/main/java/com/volmit/iris/engine/actuator/IrisDecorantActuator.java
@@ -80,7 +80,7 @@ public class IrisDecorantActuator extends EngineAssignedActuator<BlockData> {
 
     @BlockCoordinates
     @Override
-    public void onActuate(int x, int z, Hunk<BlockData> output) {
+    public void onActuate(int x, int z, Hunk<BlockData> output, boolean multicore) {
         if (!getEngine().getDimension().isDecorate()) {
             return;
         }
diff --git a/src/main/java/com/volmit/iris/engine/actuator/IrisTerrainIslandActuator.java b/src/main/java/com/volmit/iris/engine/actuator/IrisTerrainIslandActuator.java
index 84184b3eb..a0a90d8d9 100644
--- a/src/main/java/com/volmit/iris/engine/actuator/IrisTerrainIslandActuator.java
+++ b/src/main/java/com/volmit/iris/engine/actuator/IrisTerrainIslandActuator.java
@@ -53,7 +53,7 @@ public class IrisTerrainIslandActuator extends EngineAssignedActuator<BlockData>
 
     @BlockCoordinates
     @Override
-    public void onActuate(int x, int z, Hunk<BlockData> h) {
+    public void onActuate(int x, int z, Hunk<BlockData> h, boolean multicore) {
         PrecisionStopwatch p = PrecisionStopwatch.start();
         int i, zf, depth, surface, realX, realZ;
         IrisBiome biome;
diff --git a/src/main/java/com/volmit/iris/engine/actuator/IrisTerrainNormalActuator.java b/src/main/java/com/volmit/iris/engine/actuator/IrisTerrainNormalActuator.java
index 8530b4402..a09aebded 100644
--- a/src/main/java/com/volmit/iris/engine/actuator/IrisTerrainNormalActuator.java
+++ b/src/main/java/com/volmit/iris/engine/actuator/IrisTerrainNormalActuator.java
@@ -22,6 +22,7 @@ import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.framework.EngineAssignedActuator;
 import com.volmit.iris.engine.hunk.Hunk;
 import com.volmit.iris.engine.object.IrisBiome;
+import com.volmit.iris.engine.parallel.BurstExecutor;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.documentation.BlockCoordinates;
 import com.volmit.iris.util.math.RNG;
@@ -50,77 +51,104 @@ public class IrisTerrainNormalActuator extends EngineAssignedActuator<BlockData>
 
     @BlockCoordinates
     @Override
-    public void onActuate(int x, int z, Hunk<BlockData> h) {
+    public void onActuate(int x, int z, Hunk<BlockData> h, boolean multicore) {
         PrecisionStopwatch p = PrecisionStopwatch.start();
-        int i, zf, depth, realX, realZ, hf, he, b, fdepth;
-        IrisBiome biome;
-        KList<BlockData> blocks, fblocks;
 
-        for (int xf = 0; xf < h.getWidth(); xf++) {
-            for (zf = 0; zf < h.getDepth(); zf++) {
-                realX = (int) modX(xf + x);
-                realZ = (int) modZ(zf + z);
-                b = hasUnder ? (int) Math.round(getDimension().getUndercarriage().get(rng, realX, realZ)) : 0;
-                he = (int) Math.round(Math.min(h.getHeight(), getComplex().getHeightStream().get(realX, realZ)));
-                hf = Math.round(Math.max(Math.min(h.getHeight(), getDimension().getFluidHeight()), he));
-                biome = getComplex().getTrueBiomeStream().get(realX, realZ);
-                blocks = null;
-                fblocks = null;
+        if(multicore)
+        {
+            BurstExecutor e = getEngine().burst().burst(h.getWidth());
+            for (int xf = 0; xf < h.getWidth(); xf++) {
+                int finalXf = xf;
+                e.queue(() -> terrainSliver(x, z, finalXf, h));
+            }
 
-                if (hf < b) {
-                    continue;
-                }
+            e.complete();
+        }
 
-                for (i = hf; i >= b; i--) {
-                    if (i >= h.getHeight()) {
-                        continue;
-                    }
-
-                    if (i == b) {
-                        if (getDimension().isBedrock()) {
-                            h.set(xf, i, zf, BEDROCK);
-                            lastBedrock = i;
-                            continue;
-                        }
-                    }
-
-                    if (carving && getDimension().isCarved(realX, i, realZ, rng, he)) {
-                        continue;
-                    }
-
-                    if (i > he && i <= hf) {
-                        fdepth = hf - i;
-
-                        if (fblocks == null) {
-                            fblocks = biome.generateSeaLayers(realX, realZ, rng, hf - he, getData());
-                        }
-
-                        if (fblocks.hasIndex(fdepth)) {
-                            h.set(xf, i, zf, fblocks.get(fdepth));
-                            continue;
-                        }
-
-                        h.set(xf, i, zf, getComplex().getFluidStream().get(realX, +realZ));
-                        continue;
-                    }
-
-                    if (i <= he) {
-                        depth = he - i;
-                        if (blocks == null) {
-                            blocks = biome.generateLayers(realX, realZ, rng, he, he, getData(), getComplex());
-                        }
-
-                        if (blocks.hasIndex(depth)) {
-                            h.set(xf, i, zf, blocks.get(depth));
-                            continue;
-                        }
-
-                        h.set(xf, i, zf, getComplex().getRockStream().get(realX, realZ));
-                    }
-                }
+        else
+        {
+            for (int xf = 0; xf < h.getWidth(); xf++) {
+                terrainSliver(x, z, xf, h);
             }
         }
 
         getEngine().getMetrics().getTerrain().put(p.getMilliseconds());
     }
+
+    /**
+     * This is calling 1/16th of a chunk x/z slice. It is a plane from sky to bedrock 1 thick in the x direction.
+     * @param x the chunk x in blocks
+     * @param z the chunk z in blocks
+     * @param xf the current x slice
+     * @param h the blockdata
+     */
+    @BlockCoordinates
+    public void terrainSliver(int x, int z, int xf, Hunk<BlockData> h) {
+        int i, depth, realX, realZ, hf, he, b, fdepth;
+        IrisBiome biome;
+        KList<BlockData> blocks, fblocks;
+
+        for (int zf = 0; zf < h.getDepth(); zf++) {
+            realX = (int) modX(xf + x);
+            realZ = (int) modZ(zf + z);
+            b = hasUnder ? (int) Math.round(getDimension().getUndercarriage().get(rng, realX, realZ)) : 0;
+            he = (int) Math.round(Math.min(h.getHeight(), getComplex().getHeightStream().get(realX, realZ)));
+            hf = Math.round(Math.max(Math.min(h.getHeight(), getDimension().getFluidHeight()), he));
+            biome = getComplex().getTrueBiomeStream().get(realX, realZ);
+            blocks = null;
+            fblocks = null;
+
+            if (hf < b) {
+                continue;
+            }
+
+            for (i = hf; i >= b; i--) {
+                if (i >= h.getHeight()) {
+                    continue;
+                }
+
+                if (i == b) {
+                    if (getDimension().isBedrock()) {
+                        h.set(xf, i, zf, BEDROCK);
+                        lastBedrock = i;
+                        continue;
+                    }
+                }
+
+                if (carving && getDimension().isCarved(realX, i, realZ, rng, he)) {
+                    continue;
+                }
+
+                if (i > he && i <= hf) {
+                    fdepth = hf - i;
+
+                    if (fblocks == null) {
+                        fblocks = biome.generateSeaLayers(realX, realZ, rng, hf - he, getData());
+                    }
+
+                    if (fblocks.hasIndex(fdepth)) {
+                        h.set(xf, i, zf, fblocks.get(fdepth));
+                        continue;
+                    }
+
+                    h.set(xf, i, zf, getComplex().getFluidStream().get(realX, +realZ));
+                    continue;
+                }
+
+                if (i <= he) {
+                    depth = he - i;
+                    if (blocks == null) {
+                        blocks = biome.generateLayers(realX, realZ, rng, he, he, getData(), getComplex());
+                    }
+
+                    if (blocks.hasIndex(depth)) {
+                        h.set(xf, i, zf, blocks.get(depth));
+                        continue;
+                    }
+
+                    h.set(xf, i, zf, getComplex().getRockStream().get(realX, realZ));
+                }
+            }
+        }
+    }
 }
diff --git a/src/main/java/com/volmit/iris/engine/data/chunk/LinkedTerrainChunk.java b/src/main/java/com/volmit/iris/engine/data/chunk/LinkedTerrainChunk.java
index b1e0af0e0..9b3f5dbda 100644
--- a/src/main/java/com/volmit/iris/engine/data/chunk/LinkedTerrainChunk.java
+++ b/src/main/java/com/volmit/iris/engine/data/chunk/LinkedTerrainChunk.java
@@ -111,7 +111,7 @@ public class LinkedTerrainChunk implements TerrainChunk {
     }
 
     @Override
-    public void setBlock(int x, int y, int z, BlockData blockData) {
+    public synchronized void setBlock(int x, int y, int z, BlockData blockData) {
         rawChunkData.setBlock(x, y, z, blockData);
     }
 
@@ -123,37 +123,37 @@ public class LinkedTerrainChunk implements TerrainChunk {
 
     @Deprecated
     @Override
-    public void setBlock(int x, int y, int z, @NotNull Material material) {
+    public synchronized void setBlock(int x, int y, int z, @NotNull Material material) {
         rawChunkData.setBlock(x, y, z, material);
     }
 
     @Deprecated
     @Override
-    public void setBlock(int x, int y, int z, @NotNull MaterialData material) {
+    public synchronized void setBlock(int x, int y, int z, @NotNull MaterialData material) {
         rawChunkData.setBlock(x, y, z, material);
     }
 
     @Deprecated
     @Override
-    public void setRegion(int xMin, int yMin, int zMin, int xMax, int yMax, int zMax, @NotNull Material material) {
+    public synchronized void setRegion(int xMin, int yMin, int zMin, int xMax, int yMax, int zMax, @NotNull Material material) {
         rawChunkData.setRegion(xMin, yMin, zMin, xMax, yMax, zMax, material);
     }
 
     @Deprecated
     @Override
-    public void setRegion(int xMin, int yMin, int zMin, int xMax, int yMax, int zMax, @NotNull MaterialData material) {
+    public synchronized void setRegion(int xMin, int yMin, int zMin, int xMax, int yMax, int zMax, @NotNull MaterialData material) {
         rawChunkData.setRegion(xMin, yMin, zMin, xMax, yMax, zMax, material);
     }
 
     @Override
-    public void setRegion(int xMin, int yMin, int zMin, int xMax, int yMax, int zMax, @NotNull BlockData blockData) {
+    public synchronized void setRegion(int xMin, int yMin, int zMin, int xMax, int yMax, int zMax, @NotNull BlockData blockData) {
         rawChunkData.setRegion(xMin, yMin, zMin, xMax, yMax, zMax, blockData);
     }
 
     @NotNull
     @Deprecated
     @Override
-    public Material getType(int x, int y, int z) {
+    public synchronized Material getType(int x, int y, int z) {
         return rawChunkData.getType(x, y, z);
     }
 
diff --git a/src/main/java/com/volmit/iris/engine/framework/Engine.java b/src/main/java/com/volmit/iris/engine/framework/Engine.java
index a25210ab7..c756185e1 100644
--- a/src/main/java/com/volmit/iris/engine/framework/Engine.java
+++ b/src/main/java/com/volmit/iris/engine/framework/Engine.java
@@ -81,7 +81,7 @@ public interface Engine extends DataProvider, Fallible, GeneratorAccess, LootPro
 
     double modifyZ(double z);
 
-    void generate(int x, int z, Hunk<BlockData> blocks, Hunk<Biome> biomes);
+    void generate(int x, int z, Hunk<BlockData> blocks, Hunk<Biome> biomes, boolean multicore);
 
     EngineMetrics getMetrics();
 
diff --git a/src/main/java/com/volmit/iris/engine/framework/EngineActuator.java b/src/main/java/com/volmit/iris/engine/framework/EngineActuator.java
index c249e4548..6aac05f1f 100644
--- a/src/main/java/com/volmit/iris/engine/framework/EngineActuator.java
+++ b/src/main/java/com/volmit/iris/engine/framework/EngineActuator.java
@@ -23,5 +23,5 @@ import com.volmit.iris.util.documentation.BlockCoordinates;
 
 public interface EngineActuator<O> extends EngineComponent {
     @BlockCoordinates
-    void actuate(int x, int z, Hunk<O> output);
+    void actuate(int x, int z, Hunk<O> output, boolean multicore);
 }
diff --git a/src/main/java/com/volmit/iris/engine/framework/EngineAssignedActuator.java b/src/main/java/com/volmit/iris/engine/framework/EngineAssignedActuator.java
index 118e98eec..fb0c0428c 100644
--- a/src/main/java/com/volmit/iris/engine/framework/EngineAssignedActuator.java
+++ b/src/main/java/com/volmit/iris/engine/framework/EngineAssignedActuator.java
@@ -26,11 +26,11 @@ public abstract class EngineAssignedActuator<T> extends EngineAssignedComponent
         super(engine, name);
     }
 
-    public abstract void onActuate(int x, int z, Hunk<T> output);
+    public abstract void onActuate(int x, int z, Hunk<T> output, boolean multicore);
 
     @BlockCoordinates
     @Override
-    public void actuate(int x, int z, Hunk<T> output) {
-        onActuate(x, z, output);
+    public void actuate(int x, int z, Hunk<T> output, boolean multicore) {
+        onActuate(x, z, output, multicore);
     }
 }
diff --git a/src/main/java/com/volmit/iris/engine/framework/EngineAssignedModifier.java b/src/main/java/com/volmit/iris/engine/framework/EngineAssignedModifier.java
index b242d710e..902136e6e 100644
--- a/src/main/java/com/volmit/iris/engine/framework/EngineAssignedModifier.java
+++ b/src/main/java/com/volmit/iris/engine/framework/EngineAssignedModifier.java
@@ -25,10 +25,10 @@ public abstract class EngineAssignedModifier<T> extends EngineAssignedComponent
         super(engine, name);
     }
 
-    public abstract void onModify(int x, int z, Hunk<T> output);
+    public abstract void onModify(int x, int z, Hunk<T> output, boolean multicore);
 
     @Override
-    public void modify(int x, int z, Hunk<T> output) {
-        onModify(x, z, output);
+    public void modify(int x, int z, Hunk<T> output, boolean multicore) {
+        onModify(x, z, output, multicore);
     }
 }
diff --git a/src/main/java/com/volmit/iris/engine/framework/EngineCompositeGenerator.java b/src/main/java/com/volmit/iris/engine/framework/EngineCompositeGenerator.java
index aff2abbc8..7c6074169 100644
--- a/src/main/java/com/volmit/iris/engine/framework/EngineCompositeGenerator.java
+++ b/src/main/java/com/volmit/iris/engine/framework/EngineCompositeGenerator.java
@@ -457,7 +457,7 @@ public class EngineCompositeGenerator extends ChunkGenerator implements IrisAcce
             PrecisionStopwatch ps = PrecisionStopwatch.start();
             TerrainChunk tc = TerrainChunk.create(world, biome);
             IrisWorld ww = (getComposite() == null || getComposite().getWorld() == null) ? IrisWorld.fromWorld(world) : getComposite().getWorld();
-            generateChunkRawData(ww, x, z, tc).run();
+            generateChunkRawData(ww, x, z, tc, true).run();
 
             if (!getComposite().getWorld().hasRealWorld()) {
                 getComposite().getWorld().bind(world);
@@ -540,7 +540,7 @@ public class EngineCompositeGenerator extends ChunkGenerator implements IrisAcce
                     .minHeight(w.minHeight()).maxHeight(w.maxHeight())
                     .injector((xx, yy, zz, biomeBase) -> chunk.setBiomeAt(ox + xx, yy, oz + zz,
                             INMS.get().getTrueBiomeBaseId(biomeBase)))
-                    .build()).run();
+                    .build(), false).run();
         } catch (Throwable e) {
             Iris.error("======================================");
             e.printStackTrace();
@@ -556,12 +556,12 @@ public class EngineCompositeGenerator extends ChunkGenerator implements IrisAcce
         }
     }
 
-    public Runnable generateChunkRawData(IrisWorld world, int x, int z, TerrainChunk tc) {
+    public Runnable generateChunkRawData(IrisWorld world, int x, int z, TerrainChunk tc, boolean multicore) {
         initialize(world);
         Hunk<BlockData> blocks = Hunk.view((ChunkData) tc);
         Hunk<Biome> biomes = Hunk.view((BiomeGrid) tc);
         Hunk<BlockData> post = Hunk.newAtomicHunk(biomes.getWidth(), biomes.getHeight(), biomes.getDepth());
-        compound.get().generate(x * 16, z * 16, blocks, post, biomes);
+        compound.get().generate(x * 16, z * 16, blocks, post, biomes, multicore);
 
         return () -> blocks.insertSoftly(0, 0, 0, post, (b) -> b == null || B.isAirOrFluid(b));
     }
diff --git a/src/main/java/com/volmit/iris/engine/framework/EngineCompound.java b/src/main/java/com/volmit/iris/engine/framework/EngineCompound.java
index 257e192ff..44257ed44 100644
--- a/src/main/java/com/volmit/iris/engine/framework/EngineCompound.java
+++ b/src/main/java/com/volmit/iris/engine/framework/EngineCompound.java
@@ -41,7 +41,7 @@ import java.util.List;
 public interface EngineCompound extends Listener, Hotloadable, DataProvider {
     IrisDimension getRootDimension();
 
-    void generate(int x, int z, Hunk<BlockData> blocks, Hunk<BlockData> postblocks, Hunk<Biome> biomes);
+    void generate(int x, int z, Hunk<BlockData> blocks, Hunk<BlockData> postblocks, Hunk<Biome> biomes, boolean multicore);
 
     IrisWorld getWorld();
 
diff --git a/src/main/java/com/volmit/iris/engine/framework/EngineMetrics.java b/src/main/java/com/volmit/iris/engine/framework/EngineMetrics.java
index 87570ca6d..f777e41aa 100644
--- a/src/main/java/com/volmit/iris/engine/framework/EngineMetrics.java
+++ b/src/main/java/com/volmit/iris/engine/framework/EngineMetrics.java
@@ -28,6 +28,7 @@ public class EngineMetrics {
     private final AtomicRollingSequence updates;
     private final AtomicRollingSequence terrain;
     private final AtomicRollingSequence biome;
+    private final AtomicRollingSequence precache;
     private final AtomicRollingSequence parallax;
     private final AtomicRollingSequence parallaxInsert;
     private final AtomicRollingSequence post;
@@ -37,6 +38,7 @@ public class EngineMetrics {
     private final AtomicRollingSequence deposit;
 
     public EngineMetrics(int mem) {
+        this.precache = new AtomicRollingSequence(mem);
         this.total = new AtomicRollingSequence(mem);
         this.terrain = new AtomicRollingSequence(mem);
         this.biome = new AtomicRollingSequence(mem);
@@ -52,6 +54,8 @@ public class EngineMetrics {
 
     public KMap<String, Double> pull() {
         KMap<String, Double> v = new KMap<>();
+        v.put("total", total.getAverage());
+        v.put("precache", precache.getAverage());
         v.put("terrain", terrain.getAverage());
         v.put("biome", biome.getAverage());
         v.put("parallax", parallax.getAverage());
diff --git a/src/main/java/com/volmit/iris/engine/framework/EngineModifier.java b/src/main/java/com/volmit/iris/engine/framework/EngineModifier.java
index 21642ae35..fa734bff2 100644
--- a/src/main/java/com/volmit/iris/engine/framework/EngineModifier.java
+++ b/src/main/java/com/volmit/iris/engine/framework/EngineModifier.java
@@ -23,5 +23,5 @@ import com.volmit.iris.util.documentation.BlockCoordinates;
 
 public interface EngineModifier<T> extends EngineComponent {
     @BlockCoordinates
-    void modify(int x, int z, Hunk<T> t);
+    void modify(int x, int z, Hunk<T> t, boolean multicore);
 }
diff --git a/src/main/java/com/volmit/iris/engine/modifier/IrisCaveModifier.java b/src/main/java/com/volmit/iris/engine/modifier/IrisCaveModifier.java
index 1596152f1..6afb645c5 100644
--- a/src/main/java/com/volmit/iris/engine/modifier/IrisCaveModifier.java
+++ b/src/main/java/com/volmit/iris/engine/modifier/IrisCaveModifier.java
@@ -18,6 +18,7 @@
 
 package com.volmit.iris.engine.modifier;
 
+import com.volmit.iris.Iris;
 import com.volmit.iris.engine.data.B;
 import com.volmit.iris.engine.framework.Engine;
 import com.volmit.iris.engine.framework.EngineAssignedModifier;
@@ -26,6 +27,7 @@ import com.volmit.iris.engine.noise.FastNoiseDouble;
 import com.volmit.iris.engine.object.IrisBiome;
 import com.volmit.iris.engine.object.IrisCaveLayer;
 import com.volmit.iris.engine.object.common.CaveResult;
+import com.volmit.iris.engine.parallel.BurstExecutor;
 import com.volmit.iris.util.collection.KList;
 import com.volmit.iris.util.math.RNG;
 import com.volmit.iris.util.scheduling.PrecisionStopwatch;
@@ -48,48 +50,67 @@ public class IrisCaveModifier extends EngineAssignedModifier<BlockData> {
     }
 
     @Override
-    public void onModify(int x, int z, Hunk<BlockData> a) {
+    public void onModify(int x, int z, Hunk<BlockData> a, boolean multicore) {
         if (!getDimension().isCaves()) {
             return;
         }
 
         PrecisionStopwatch p = PrecisionStopwatch.start();
-        for (int i = 0; i < a.getWidth(); i++) {
-            for (int j = 0; j < a.getDepth(); j++) {
-                KList<CaveResult> caves = genCaves(x + i, z + j, i, j, a);
-                int he = (int) Math.round(getComplex().getHeightStream().get(x + i, z + j));
-                if (caves != null && caves.isNotEmpty()) {
-                    IrisBiome cave = getComplex().getCaveBiomeStream().get(x + i, z + j);
+        if(multicore)
+        {
+            BurstExecutor e = getEngine().burst().burst(a.getWidth());
+            for (int i = 0; i < a.getWidth(); i++) {
+                int finalI = i;
+                e.queue(() -> modifySliver(x, z, finalI, a));
+            }
 
-                    if (cave == null) {
-                        continue;
-                    }
+            e.complete();
+        }
 
-                    for (CaveResult cl : caves) {
-                        if (cl.getFloor() < 0 || cl.getFloor() > getEngine().getHeight() || cl.getCeiling() > getEngine().getHeight() || cl.getCeiling() < 0) {
-                            continue;
-                        }
-
-                        KList<BlockData> floor = cave.generateLayers(x + i, z + j, rng, cl.getFloor(), cl.getFloor(), getData(), getComplex());
-                        KList<BlockData> ceiling = cave.generateLayers(x + i + 656, z + j - 656, rng,
-                                he - cl.getCeiling(),
-                                he - cl.getCeiling(), getData(), getComplex());
-
-                        for (int g = 0; g < floor.size(); g++) {
-                            a.set(i, cl.getFloor() - g, j, floor.get(g));
-                        }
-
-                        for (int g = ceiling.size() - 1; g > 0; g--) {
-                            a.set(i, cl.getCeiling() + g, j, ceiling.get(g));
-                        }
-                    }
-                }
+        else
+        {
+            for (int i = 0; i < a.getWidth(); i++) {
+                modifySliver(x, z, i, a);
             }
         }
 
         getEngine().getMetrics().getCave().put(p.getMilliseconds());
     }
 
+    public void modifySliver(int x, int z, int finalI, Hunk<BlockData> a)
+    {
+        for (int j = 0; j < a.getDepth(); j++) {
+            KList<CaveResult> caves = genCaves(x + finalI, z + j, finalI, j, a);
+            int he = (int) Math.round(getComplex().getHeightStream().get(x + finalI, z + j));
+            if (caves != null && caves.isNotEmpty()) {
+                IrisBiome cave = getComplex().getCaveBiomeStream().get(x + finalI, z + j);
+
+                if (cave == null) {
+                    continue;
+                }
+
+                for (CaveResult cl : caves) {
+                    if (cl.getFloor() < 0 || cl.getFloor() > getEngine().getHeight() || cl.getCeiling() > getEngine().getHeight() || cl.getCeiling() < 0) {
+                        continue;
+                    }
+
+                    KList<BlockData> floor = cave.generateLayers(x + finalI, z + j, rng, cl.getFloor(), cl.getFloor(), getData(), getComplex());
+                    KList<BlockData> ceiling = cave.generateLayers(x + finalI + 656, z + j - 656, rng,
+                            he - cl.getCeiling(),
+                            he - cl.getCeiling(), getData(), getComplex());
+
+                    for (int g = 0; g < floor.size(); g++) {
+                        a.set(finalI, cl.getFloor() - g, j, floor.get(g));
+                    }
+
+                    for (int g = ceiling.size() - 1; g > 0; g--) {
+                        a.set(finalI, cl.getCeiling() + g, j, ceiling.get(g));
+                    }
+                }
+            }
+        }
+    }
+
     public KList<CaveResult> genCaves(double wxx, double wzz, int x, int z, Hunk<BlockData> data) {
         if (!getDimension().isCaves()) {
             return EMPTY;
diff --git a/src/main/java/com/volmit/iris/engine/modifier/IrisDepositModifier.java b/src/main/java/com/volmit/iris/engine/modifier/IrisDepositModifier.java
index 035e95383..3c549ecb4 100644
--- a/src/main/java/com/volmit/iris/engine/modifier/IrisDepositModifier.java
+++ b/src/main/java/com/volmit/iris/engine/modifier/IrisDepositModifier.java
@@ -40,7 +40,7 @@ public class IrisDepositModifier extends EngineAssignedModifier<BlockData> {
     }
 
     @Override
-    public void onModify(int x, int z, Hunk<BlockData> output) {
+    public void onModify(int x, int z, Hunk<BlockData> output, boolean multicore) {
         PrecisionStopwatch p = PrecisionStopwatch.start();
         generateDeposits(rng, output, Math.floorDiv(x, 16), Math.floorDiv(z, 16));
         getEngine().getMetrics().getDeposit().put(p.getMilliseconds());
diff --git a/src/main/java/com/volmit/iris/engine/modifier/IrisPostModifier.java b/src/main/java/com/volmit/iris/engine/modifier/IrisPostModifier.java
index 67309d589..d04c00f2b 100644
--- a/src/main/java/com/volmit/iris/engine/modifier/IrisPostModifier.java
+++ b/src/main/java/com/volmit/iris/engine/modifier/IrisPostModifier.java
@@ -25,6 +25,7 @@ import com.volmit.iris.engine.framework.EngineAssignedModifier;
 import com.volmit.iris.engine.hunk.Hunk;
 import com.volmit.iris.engine.object.IrisBiome;
 import com.volmit.iris.engine.object.common.CaveResult;
+import com.volmit.iris.engine.parallel.BurstExecutor;
 import com.volmit.iris.util.math.RNG;
 import com.volmit.iris.util.scheduling.PrecisionStopwatch;
 import org.bukkit.Material;
@@ -33,6 +34,8 @@ import org.bukkit.block.data.Levelled;
 import org.bukkit.block.data.Waterlogged;
 import org.bukkit.block.data.type.Slab;
 
+import java.util.concurrent.atomic.AtomicInteger;
+
 public class IrisPostModifier extends EngineAssignedModifier<BlockData> {
     private static final BlockData AIR = B.get("CAVE_AIR");
     private static final BlockData WATER = B.get("WATER");
@@ -44,14 +47,33 @@ public class IrisPostModifier extends EngineAssignedModifier<BlockData> {
     }
 
     @Override
-    public void onModify(int x, int z, Hunk<BlockData> output) {
+    public void onModify(int x, int z, Hunk<BlockData> output, boolean multicore) {
         PrecisionStopwatch p = PrecisionStopwatch.start();
-        int i, j;
-        for (i = 0; i < output.getWidth(); i++) {
-            for (j = 0; j < output.getDepth(); j++) {
-                post(i, j, output, i + x, j + z);
+        int i;
+        AtomicInteger j = new AtomicInteger();
+        if(multicore)
+        {
+            BurstExecutor e = getEngine().burst().burst(output.getWidth());
+            for (i = 0; i < output.getWidth(); i++) {
+                int finalI = i;
+                e.queue(() -> {
+                    for (j.set(0); j.get() < output.getDepth(); j.getAndIncrement()) {
+                        post(finalI, j.get(), output, finalI + x, j.get() + z);
+                    }
+                });
+            }
+            e.complete();
+        }
+
+        else
+        {
+            for (i = 0; i < output.getWidth(); i++) {
+                for (j.set(0); j.get() < output.getDepth(); j.getAndIncrement()) {
+                    post(i, j.get(), output, i + x, j.get() + z);
+                }
             }
         }
+
         getEngine().getMetrics().getPost().put(p.getMilliseconds());
     }
 
diff --git a/src/main/java/com/volmit/iris/engine/modifier/IrisRavineModifier.java b/src/main/java/com/volmit/iris/engine/modifier/IrisRavineModifier.java
index 70f64ae8e..e4a2ae5a7 100644
--- a/src/main/java/com/volmit/iris/engine/modifier/IrisRavineModifier.java
+++ b/src/main/java/com/volmit/iris/engine/modifier/IrisRavineModifier.java
@@ -46,7 +46,7 @@ public class IrisRavineModifier extends EngineAssignedModifier<BlockData> {
     }
 
     @Override
-    public void onModify(int x, int z, Hunk<BlockData> output) {
+    public void onModify(int x, int z, Hunk<BlockData> output, boolean multicore) {
         if (!getDimension().isRavines()) {
             return;
         }