diff --git a/src/main/java/ninja/bytecode/iris/Iris.java b/src/main/java/ninja/bytecode/iris/Iris.java
index a4eff0fd8..6bac636df 100644
--- a/src/main/java/ninja/bytecode/iris/Iris.java
+++ b/src/main/java/ninja/bytecode/iris/Iris.java
@@ -19,12 +19,13 @@ import ninja.bytecode.shuriken.logging.L;
 public class Iris extends JavaPlugin implements Listener
 {
 	public IrisControllerSet controllerSet;
-
+	public static Thread primaryThread;
 	public static Settings settings;
 	public static Iris instance;
 
 	public void onEnable()
 	{
+		primaryThread = Thread.currentThread();
 		instance = this;
 		controllerSet = new IrisControllerSet();
 		L.consoleConsumer = (s) -> Bukkit.getConsoleSender().sendMessage(s);
diff --git a/src/main/java/ninja/bytecode/iris/Settings.java b/src/main/java/ninja/bytecode/iris/Settings.java
index 5c26e79dd..58a76b595 100644
--- a/src/main/java/ninja/bytecode/iris/Settings.java
+++ b/src/main/java/ninja/bytecode/iris/Settings.java
@@ -26,8 +26,8 @@ public class Settings
 		public int hermiteSampleRadius = 4;
 		public double horizontalZoom = 2;
 		public double heightFracture = 155;
-		public double landScale = 0.45;
-		public double landChance = 0.53;
+		public double landScale = 0.25;
+		public double landChance = 0.45;
 		public double biomeEdgeScramble = 0; // 1550D
 		public double roughness = 1.55;
 		public double heightMultiplier = 0.806;
@@ -38,9 +38,9 @@ public class Settings
 		public int seaLevel = 63;
 		public double caveDensity = 4;
 		public double caveScale = 1.45;
-		public double biomeScale = 5;
+		public double biomeScale = 0.65;
 		public boolean flatBedrock = true;
-		public boolean genObjects = false;
+		public boolean genObjects = true;
 		public boolean genCarving = true;
 		public boolean genCaverns = true;
 		public boolean genCaves = true;
diff --git a/src/main/java/ninja/bytecode/iris/generator/IrisGenerator.java b/src/main/java/ninja/bytecode/iris/generator/IrisGenerator.java
index ebbcb9a62..998f187f9 100644
--- a/src/main/java/ninja/bytecode/iris/generator/IrisGenerator.java
+++ b/src/main/java/ninja/bytecode/iris/generator/IrisGenerator.java
@@ -8,6 +8,7 @@ import org.bukkit.World;
 import org.bukkit.block.Biome;
 import org.bukkit.generator.BlockPopulator;
 
+import net.minecraft.server.v1_12_R1.CriterionTriggerBredAnimals.b;
 import ninja.bytecode.iris.Iris;
 import ninja.bytecode.iris.controller.PackController;
 import ninja.bytecode.iris.generator.genobject.GenObjectDecorator;
@@ -23,6 +24,7 @@ import ninja.bytecode.iris.pack.CompiledDimension;
 import ninja.bytecode.iris.pack.IrisBiome;
 import ninja.bytecode.iris.pack.IrisRegion;
 import ninja.bytecode.iris.util.AtomicChunkData;
+import ninja.bytecode.iris.util.BiomeLayer;
 import ninja.bytecode.iris.util.ChunkPlan;
 import ninja.bytecode.iris.util.IrisInterpolation;
 import ninja.bytecode.iris.util.MB;
@@ -126,13 +128,6 @@ public class IrisGenerator extends ParallelChunkGenerator
 				}
 			}
 		}
-
-		int m = 0;
-
-		for(IrisBiome i : getDimension().getBiomes())
-		{
-			i.seal(getRTerrain().nextParallelRNG(3922 - m++));
-		}
 	}
 
 	@Override
@@ -149,8 +144,10 @@ public class IrisGenerator extends ParallelChunkGenerator
 		int height = computeHeight(wxx, wzx, new ChunkPlan(), biome);
 		IrisBiome nbiome = height < 63 ? getOcean(real, height) : biome;
 		biome = nbiome;
+		int beach = 65;
 		biome = height > 61 && height < 65 ? frozen ? biome : getBeach(real) : biome;
 		biome = height > 63 && biome.getType().equals(BiomeType.FLUID) ? getBeach(real) : biome;
+		biome = height >= beach && !biome.getType().equals(BiomeType.LAND) ? real : biome;
 
 		return biome;
 	}
@@ -247,7 +244,7 @@ public class IrisGenerator extends ParallelChunkGenerator
 		boolean frozen = r != null && r.isFrozen();
 		int height = computeHeight(wxx, wzx, plan, biome);
 		int max = Math.max(height, seaLevel);
-		
+
 		for(int i = 0; i < max; i++)
 		{
 			MB mb = ROCK.get(scatterInt(wzx, i, wxx, ROCK.size()));
diff --git a/src/main/java/ninja/bytecode/iris/generator/genobject/GenObjectDecorator.java b/src/main/java/ninja/bytecode/iris/generator/genobject/GenObjectDecorator.java
index 9746ba576..1fd31044f 100644
--- a/src/main/java/ninja/bytecode/iris/generator/genobject/GenObjectDecorator.java
+++ b/src/main/java/ninja/bytecode/iris/generator/genobject/GenObjectDecorator.java
@@ -1,7 +1,11 @@
 package ninja.bytecode.iris.generator.genobject;
 
+import java.lang.Thread.State;
 import java.util.Random;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
 
+import org.bukkit.Bukkit;
 import org.bukkit.Chunk;
 import org.bukkit.Location;
 import org.bukkit.Material;
@@ -23,6 +27,7 @@ import ninja.bytecode.iris.util.IPlacer;
 import ninja.bytecode.shuriken.collections.GMap;
 import ninja.bytecode.shuriken.collections.GSet;
 import ninja.bytecode.shuriken.execution.ChronoLatch;
+import ninja.bytecode.shuriken.execution.J;
 import ninja.bytecode.shuriken.logging.L;
 import ninja.bytecode.shuriken.math.M;
 
@@ -30,6 +35,7 @@ public class GenObjectDecorator extends BlockPopulator
 {
 	private GMap<IrisBiome, GMap<GenObjectGroup, Double>> populationCache;
 	private IPlacer placer;
+	private Executor ex;
 	private IrisGenerator g;
 	private ChronoLatch cl = new ChronoLatch(250);
 
@@ -37,6 +43,7 @@ public class GenObjectDecorator extends BlockPopulator
 	{
 		this.g = generator;
 		populationCache = new GMap<>();
+		ex = Executors.newSingleThreadExecutor();
 
 		for(IrisBiome i : generator.getDimension().getBiomes())
 		{
@@ -70,15 +77,15 @@ public class GenObjectDecorator extends BlockPopulator
 				}
 			}
 		}
+
+		L.i("Population Cache is " + populationCache.size());
 	}
 
 	@Override
 	public void populate(World world, Random rnotusingyou, Chunk source)
 	{
-		try
-		{
+		ex.execute(() -> {
 			Random random = new Random(((source.getX() - 32) * (source.getZ() + 54)) + world.getSeed());
-			Iris.getController(TimingsController.class).started("decor");
 			GSet<IrisBiome> hits = new GSet<>();
 
 			for(int i = 0; i < Iris.settings.performance.decorationAccuracy; i++)
@@ -100,21 +107,15 @@ public class GenObjectDecorator extends BlockPopulator
 				}
 
 				hits.add(biome);
+
 				populate(world, random, source, biome, objects);
 			}
 
-			Iris.getController(TimingsController.class).stopped("decor");
-		}
-
-		catch(Throwable e)
-		{
-
-		}
-
-		if(Iris.settings.performance.verbose)
-		{
-			L.flush();
-		}
+			if(Iris.settings.performance.verbose)
+			{
+				L.flush();
+			}
+		});
 	}
 
 	private void populate(World world, Random random, Chunk source, IrisBiome biome, GMap<GenObjectGroup, Double> objects)
@@ -149,12 +150,15 @@ public class GenObjectDecorator extends BlockPopulator
 					}
 
 					GenObject g = i.getSchematics().get(random.nextInt(i.getSchematics().size()));
-					Location start = g.place(x, b.getY(), z, placer);
-
-					if(start != null && Iris.settings.performance.verbose)
+					Bukkit.getScheduler().scheduleSyncDelayedTask(Iris.instance, () ->
 					{
-						L.v(C.GRAY + "Placed " + C.DARK_GREEN + i.getName() + C.WHITE + "/" + C.DARK_GREEN + g.getName() + C.GRAY + " at " + C.DARK_GREEN + F.f(start.getBlockX()) + " " + F.f(start.getBlockY()) + " " + F.f(start.getBlockZ()));
-					}
+						Location start = g.place(x, b.getY(), z, placer);
+
+						if(start != null && Iris.settings.performance.verbose)
+						{
+							L.v(C.GRAY + "Placed " + C.DARK_GREEN + i.getName() + C.WHITE + "/" + C.DARK_GREEN + g.getName() + C.GRAY + " at " + C.DARK_GREEN + F.f(start.getBlockX()) + " " + F.f(start.getBlockY()) + " " + F.f(start.getBlockZ()));
+						}
+					});
 				}
 			}
 		}
diff --git a/src/main/java/ninja/bytecode/iris/generator/layer/GenLayerBiome.java b/src/main/java/ninja/bytecode/iris/generator/layer/GenLayerBiome.java
index bd0dee4ce..eeb7a59d3 100644
--- a/src/main/java/ninja/bytecode/iris/generator/layer/GenLayerBiome.java
+++ b/src/main/java/ninja/bytecode/iris/generator/layer/GenLayerBiome.java
@@ -9,8 +9,8 @@ import ninja.bytecode.iris.Iris;
 import ninja.bytecode.iris.generator.IrisGenerator;
 import ninja.bytecode.iris.pack.IrisBiome;
 import ninja.bytecode.iris.pack.IrisRegion;
+import ninja.bytecode.iris.util.BiomeLayer;
 import ninja.bytecode.iris.util.GenLayer;
-import ninja.bytecode.iris.util.PolygonGenerator.EnumPolygonGenerator;
 import ninja.bytecode.shuriken.collections.GList;
 import ninja.bytecode.shuriken.collections.GMap;
 import ninja.bytecode.shuriken.math.CNG;
@@ -19,11 +19,11 @@ import ninja.bytecode.shuriken.math.RNG;
 
 public class GenLayerBiome extends GenLayer
 {
-	private EnumPolygonGenerator<IrisRegion> regionGenerator;
 	private GMap<String, IrisRegion> regions;
 	private Function<CNG, CNG> factory;
 	private CNG fracture;
 	private CNG island;
+	private BiomeLayer master;
 
 	public GenLayerBiome(IrisGenerator iris, World world, Random random, RNG rng, GList<IrisBiome> biomes)
 	{
@@ -31,12 +31,16 @@ public class GenLayerBiome extends GenLayer
 		//@builder
 		island = new CNG(rng.nextParallelRNG(10334), 1D, 1)
 				.scale(0.003 * Iris.settings.gen.landScale)
-				.fractureWith(new CNG(rng.nextParallelRNG(1211), 1D, 1).scale(0.0001 * Iris.settings.gen.landScale), 600);
+				.fractureWith(new CNG(rng.nextParallelRNG(1211), 1D, 1)
+						.scale(0.001 * Iris.settings.gen.landScale), 600);
 		fracture = new CNG(rng.nextParallelRNG(28), 1D, 4).scale(0.0021)
 				.fractureWith(new CNG(rng.nextParallelRNG(34), 1D, 2)
 						.scale(0.01), 12250);
-		factory = (g) -> g.fractureWith(new CNG(rng.nextParallelRNG(29), 1D, 4)
-				.scale(0.02), 56);
+		factory = (g) -> g.fractureWith(new CNG(rng.nextParallelRNG(29), 1D, 3)
+				.scale(0.005 * Iris.settings.gen.biomeScale), 1024D / Iris.settings.gen.biomeScale)
+				.fractureWith(new CNG(rng.nextParallelRNG(1212), 1D, 2)
+						.scale(0.04)
+						.fractureWith(new CNG(rng.nextParallelRNG(1216), 1D, 3).scale(0.0004), 266), 66);
 		//@done
 		regions = new GMap<>();
 
@@ -60,13 +64,18 @@ public class GenLayerBiome extends GenLayer
 			i.load();
 		}
 
-		int v = 85034;
-		regionGenerator = new EnumPolygonGenerator<IrisRegion>(rng.nextParallelRNG(v), 0.00522 * Iris.settings.gen.biomeScale * 0.189, 1, regions.v().toArray(new IrisRegion[regions.v().size()]), factory);
+		int m = 0;
 
-		for(IrisRegion i : regions.v())
+		for(IrisBiome i : iris.getDimension().getBiomes())
 		{
-			v += 13 - i.getName().length();
-			i.setGen(new EnumPolygonGenerator<IrisBiome>(rng.nextParallelRNG(33 + v), 0.000255 * i.getBiomes().size() * Iris.settings.gen.biomeScale, 1, i.getBiomes().toArray(new IrisBiome[i.getBiomes().size()]), factory));
+			i.seal(iris.getRTerrain().nextParallelRNG(3922 - m++));
+		}
+
+		master = BiomeLayer.compile(iris, 0.082 * Iris.settings.gen.biomeScale * 0.189, 1, factory);
+		
+		if(Iris.settings.performance.verbose)
+		{
+			master.print(2);
 		}
 	}
 
@@ -117,11 +126,6 @@ public class GenLayerBiome extends GenLayer
 		return hasHeightBorder(6, range, wx, wz);
 	}
 
-	public EnumPolygonGenerator<IrisBiome> getRegionGenerator(double xx, double zz)
-	{
-		return regionGenerator.getChoice(xx, zz).getGen();
-	}
-
 	public IrisBiome getBiome(double wxx, double wzx)
 	{
 		return getBiome(wxx, wzx, false);
@@ -136,7 +140,7 @@ public class GenLayerBiome extends GenLayer
 
 		if(real)
 		{
-			return getRegionGenerator(x, z).getChoice(x, z);
+			return master.computeBiome(x, z);
 		}
 
 		IrisBiome cbi = iris.biome("Ocean");
@@ -145,7 +149,7 @@ public class GenLayerBiome extends GenLayer
 
 		if(land > landChance)
 		{
-			cbi = getRegionGenerator(x, z).getChoice(x, z);
+			cbi = master.computeBiome(x, z);
 		}
 
 		else if(land < 0.1)
diff --git a/src/main/java/ninja/bytecode/iris/generator/placer/NMSPlacer.java b/src/main/java/ninja/bytecode/iris/generator/placer/NMSPlacer.java
index 543d8c539..f98287dd1 100644
--- a/src/main/java/ninja/bytecode/iris/generator/placer/NMSPlacer.java
+++ b/src/main/java/ninja/bytecode/iris/generator/placer/NMSPlacer.java
@@ -48,19 +48,21 @@ public class NMSPlacer extends Placer
 
 	public void flush()
 	{
-		for(Chunk i : c)
-		{
-			NMP.host.relight(i);
-
-			J.a(() ->
+		J.attempt(() -> {
+			for(Chunk i : c)
 			{
-				for(Player j : i.getWorld().getPlayers())
-				{
-					NMP.CHUNK.refreshIgnorePosition(j, i);
-				}
-			});
-		}
+				NMP.host.relight(i);
 
-		c.clear();
+				J.a(() ->
+				{
+					for(Player j : i.getWorld().getPlayers())
+					{
+						NMP.CHUNK.refreshIgnorePosition(j, i);
+					}
+				});
+			}
+
+			c.clear();
+		});
 	}
 }
diff --git a/src/main/java/ninja/bytecode/iris/pack/IrisBiome.java b/src/main/java/ninja/bytecode/iris/pack/IrisBiome.java
index 5f3e9d84d..98835e901 100644
--- a/src/main/java/ninja/bytecode/iris/pack/IrisBiome.java
+++ b/src/main/java/ninja/bytecode/iris/pack/IrisBiome.java
@@ -5,6 +5,7 @@ import java.lang.reflect.Field;
 import org.bukkit.Material;
 import org.bukkit.block.Biome;
 
+import mortar.util.text.C;
 import ninja.bytecode.iris.Iris;
 import ninja.bytecode.iris.controller.PackController;
 import ninja.bytecode.iris.generator.layer.BiomeNoiseGenerator;
@@ -53,6 +54,7 @@ public class IrisBiome
 	private double genAmplifier;
 	private double genSwirl;
 	private double genSwirlScale;
+	private double rarity;
 	private boolean cliffs;
 	private BiomeNoiseGenerator bng;
 	private BiomeType type;
@@ -116,6 +118,7 @@ public class IrisBiome
 		type = BiomeType.LAND;
 		cliffs = false;
 		genScale = 1;
+		rarity = 1;
 		genAmplifier = 0.35;
 		genSwirl = 1;
 		genSwirlScale = 1;
@@ -239,6 +242,7 @@ public class IrisBiome
 		J.attempt(() -> genSwirlScale = o.getDouble("genSwirlScale"));
 		J.attempt(() -> genScale = o.getDouble("genScale"));
 		J.attempt(() -> snow = o.getDouble("snow"));
+		J.attempt(() -> rarity = o.getDouble("rarity"));
 		J.attempt(() -> dirtDepth = o.getInt("subSurfaceDepth"));
 		J.attempt(() -> dirtDepth = o.getInt("dirtDepth"));
 		J.attempt(() -> rockDepth = o.getInt("rockDepth"));
@@ -292,6 +296,7 @@ public class IrisBiome
 		J.attempt(() -> j.put("region", region));
 		J.attempt(() -> j.put("derivative", realBiome.name().toLowerCase().replaceAll("_", " ")));
 		J.attempt(() -> j.put("type", type.name().toLowerCase().replaceAll("_", " ")));
+		J.attempt(() -> j.put("rarity", rarity));
 		J.attempt(() -> j.put("genHeight", height));
 		J.attempt(() -> j.put("genScale", genScale));
 		J.attempt(() -> j.put("genSwirl", genSwirl));
@@ -679,6 +684,31 @@ public class IrisBiome
 		return parent;
 	}
 
+	public GList<String> getParents()
+	{
+		GList<String> f = new GList<>();
+
+		if(getParent().trim().isEmpty())
+		{
+			return f;
+		}
+
+		if(getParent().contains("&"))
+		{
+			for(String i : getParent().split("\\Q&\\E"))
+			{
+				f.add(i.trim());
+			}
+		}
+
+		else
+		{
+			f.add(getParent().trim());
+		}
+
+		return f;
+	}
+
 	public boolean isScatterSurfaceRock()
 	{
 		return scatterSurfaceRock;
@@ -929,6 +959,84 @@ public class IrisBiome
 		this.bng = bng;
 	}
 
+	public double getRarity()
+	{
+		return rarity;
+	}
+
+	public String getRarityString()
+	{
+		if(getRarity() <= 0.1)
+		{
+			return C.RED + "Literally Everywhere";
+		}
+
+		else if(getRarity() < 0.25)
+		{
+			return "Overly Abundant";
+		}
+
+		else if(getRarity() < 0.4)
+		{
+			return "Very Abundant";
+		}
+
+		else if(getRarity() < 0.6)
+		{
+			return "Abundant";
+		}
+
+		else if(getRarity() < 0.75)
+		{
+			return "Very Common";
+		}
+
+		else if(getRarity() <= 1)
+		{
+			return "Common";
+		}
+
+		else if(getRarity() <= 2)
+		{
+			return "Often";
+		}
+
+		else if(getRarity() <= 3)
+		{
+			return "Uncommon";
+		}
+
+		else if(getRarity() <= 6)
+		{
+			return "Rare";
+		}
+
+		else if(getRarity() <= 16)
+		{
+			return "Very Rare";
+		}
+
+		else if(getRarity() <= 50)
+		{
+			return "Exceedingly Rare";
+		}
+
+		else if(getRarity() <= 100)
+		{
+			return "Marvelously Rare";
+		}
+
+		else if(getRarity() <= 200)
+		{
+			return "Extraordinarily Rare";
+		}
+
+		else
+		{
+			return "Start Praying";
+		}
+	}
+
 	@Override
 	public int hashCode()
 	{
@@ -955,6 +1063,8 @@ public class IrisBiome
 		result = prime * result + (int) (temp ^ (temp >>> 32));
 		result = prime * result + ((name == null) ? 0 : name.hashCode());
 		result = prime * result + ((parent == null) ? 0 : parent.hashCode());
+		temp = Double.doubleToLongBits(rarity);
+		result = prime * result + (int) (temp ^ (temp >>> 32));
 		result = prime * result + ((realBiome == null) ? 0 : realBiome.hashCode());
 		result = prime * result + ((region == null) ? 0 : region.hashCode());
 		result = prime * result + ((rock == null) ? 0 : rock.hashCode());
@@ -1031,6 +1141,8 @@ public class IrisBiome
 		}
 		else if(!parent.equals(other.parent))
 			return false;
+		if(Double.doubleToLongBits(rarity) != Double.doubleToLongBits(other.rarity))
+			return false;
 		if(realBiome != other.realBiome)
 			return false;
 		if(region == null)
diff --git a/src/main/java/ninja/bytecode/iris/pack/IrisRegion.java b/src/main/java/ninja/bytecode/iris/pack/IrisRegion.java
index bfe2a8213..c1390c91a 100644
--- a/src/main/java/ninja/bytecode/iris/pack/IrisRegion.java
+++ b/src/main/java/ninja/bytecode/iris/pack/IrisRegion.java
@@ -2,7 +2,6 @@ package ninja.bytecode.iris.pack;
 
 import ninja.bytecode.iris.Iris;
 import ninja.bytecode.iris.controller.PackController;
-import ninja.bytecode.iris.util.PolygonGenerator.EnumPolygonGenerator;
 import ninja.bytecode.shuriken.collections.GList;
 import ninja.bytecode.shuriken.execution.J;
 import ninja.bytecode.shuriken.json.JSONObject;
@@ -11,7 +10,6 @@ public class IrisRegion
 {
 	private String name;
 	private GList<IrisBiome> biomes;
-	private EnumPolygonGenerator<IrisBiome> gen;
 	private double rarity;
 	private boolean frozen;
 	private IrisBiome beach;
@@ -37,16 +35,6 @@ public class IrisRegion
 		});
 	}
 
-	public EnumPolygonGenerator<IrisBiome> getGen()
-	{
-		return gen;
-	}
-
-	public void setGen(EnumPolygonGenerator<IrisBiome> gen)
-	{
-		this.gen = gen;
-	}
-
 	public String getName()
 	{
 		return name;
@@ -94,7 +82,6 @@ public class IrisRegion
 		int result = 1;
 		result = prime * result + ((beach == null) ? 0 : beach.hashCode());
 		result = prime * result + ((biomes == null) ? 0 : biomes.hashCode());
-		result = prime * result + ((gen == null) ? 0 : gen.hashCode());
 		result = prime * result + ((name == null) ? 0 : name.hashCode());
 		long temp;
 		temp = Double.doubleToLongBits(rarity);
@@ -126,13 +113,7 @@ public class IrisRegion
 		}
 		else if(!biomes.equals(other.biomes))
 			return false;
-		if(gen == null)
-		{
-			if(other.gen != null)
-				return false;
-		}
-		else if(!gen.equals(other.gen))
-			return false;
+
 		if(name == null)
 		{
 			if(other.name != null)
diff --git a/src/main/java/ninja/bytecode/iris/util/BiomeLayer.java b/src/main/java/ninja/bytecode/iris/util/BiomeLayer.java
new file mode 100644
index 000000000..9811fc175
--- /dev/null
+++ b/src/main/java/ninja/bytecode/iris/util/BiomeLayer.java
@@ -0,0 +1,211 @@
+package ninja.bytecode.iris.util;
+
+import java.util.function.Function;
+
+import org.bukkit.Material;
+import org.bukkit.block.Biome;
+
+import mortar.lang.collection.GList;
+import mortar.lang.collection.GMap;
+import mortar.logic.format.F;
+import mortar.util.text.C;
+import ninja.bytecode.iris.generator.IrisGenerator;
+import ninja.bytecode.iris.pack.BiomeType;
+import ninja.bytecode.iris.pack.IrisBiome;
+import ninja.bytecode.iris.util.PolygonGenerator.EnumPolygonGenerator;
+import ninja.bytecode.shuriken.collections.GSet;
+import ninja.bytecode.shuriken.logging.L;
+import ninja.bytecode.shuriken.math.CNG;
+import ninja.bytecode.shuriken.math.RNG;
+
+public class BiomeLayer
+{
+	private static final IrisBiome VOID = new IrisBiome("Master", Biome.VOID).height(-1).dirt(MB.of(Material.END_BRICKS)).seal(RNG.r);
+	private GList<BiomeLayer> children;
+	private EnumPolygonGenerator<BiomeLayer> gen;
+	private IrisBiome biome;
+	private IrisGenerator iris;
+
+	public BiomeLayer(IrisGenerator iris, IrisBiome biome)
+	{
+		this.biome = biome == null ? VOID : biome;
+		this.iris = iris;
+		this.children = new GList<>();
+	}
+
+	private void compile(double scale, int octaves, Function<CNG, CNG> factory)
+	{
+		if(gen != null)
+		{
+			return;
+		}
+
+		if(children.isEmpty())
+		{
+			gen = null;
+			return;
+		}
+
+		GMap<BiomeLayer, Double> rarities = new GMap<>();
+		for(BiomeLayer i : getChildren())
+		{
+			rarities.put(i, i.getBiome().getRarity());
+		}
+
+		if(!getBiome().equals(VOID))
+		{
+			rarities.put(this, getBiome().getRarity());
+		}
+
+		gen = new EnumPolygonGenerator<>(iris.getRTerrain().nextParallelRNG(1022 + getBiome().getRealBiome().ordinal() + getBiome().hashCode()), scale, octaves, rarities, factory).useRarity();
+
+		for(BiomeLayer i : getChildren())
+		{
+			i.compile(scale, octaves, factory);
+		}
+	}
+
+	private IrisBiome computeBiome(double x, double z, GList<String> f)
+	{
+		if(gen != null)
+		{
+			BiomeLayer b = gen.getChoice(x, z);
+
+			if(b.biome.equals(biome))
+			{
+				return biome;
+			}
+
+			if(f.contains(b.getBiome().getName()))
+			{
+				f.add("...");
+				f.add(b.getBiome().getName());
+				L.w(C.YELLOW + "Cyclic Biome Heiarchy Detected! " + C.RED + f.toString(C.GRAY + " -> " + C.RED));
+				return b.biome;
+			}
+
+			f.add(b.getBiome().getName());
+
+			return b.computeBiome(x, z, f);
+		}
+
+		return getBiome();
+	}
+
+	public IrisBiome computeBiome(double x, double z)
+	{
+		return computeBiome(x, z, new GList<String>());
+	}
+
+	public void addLayer(IrisBiome biome)
+	{
+		addLayer(new BiomeLayer(iris, biome));
+	}
+
+	public void addLayer(BiomeLayer layer)
+	{
+		getChildren().add(layer);
+	}
+
+	public IrisBiome getBiome()
+	{
+		return biome;
+	}
+
+	public GList<BiomeLayer> getChildren()
+	{
+		return children;
+	}
+
+	public void setChildren(GList<BiomeLayer> children)
+	{
+		this.children = children;
+	}
+
+	public void print(int indent)
+	{
+		print(0, F.repeat(" ", indent));
+	}
+
+	private void print(int index, String indent)
+	{
+		L.i(C.GRAY + F.repeat(indent, index) + "Layer " + C.DARK_GREEN + getBiome().getName() + C.GRAY + "(" + C.GOLD + getBiome().getRarityString() + C.GRAY + ")" + (getBiome().getGenAmplifier() != 0.35 ? C.DARK_AQUA + " A: " + getBiome().getGenAmplifier() : "") + (getBiome().getHeight() != 0.0 ? C.DARK_RED + " H: " + getBiome().getHeight() : "") + (getBiome().hasCliffs() ? C.DARK_PURPLE + " C: " + getBiome().getCliffChance() + " x " + getBiome().getCliffScale() : ""));
+		L.flush();
+		if(!getBiome().getSchematicGroups().isEmpty())
+		{
+			for(String i : getBiome().getSchematicGroups().k())
+			{
+				String f = "";
+				double percent = getBiome().getSchematicGroups().get(i);
+
+				if(percent > 1D)
+				{
+					f = (int) percent + " + " + F.pc(percent - (int) percent, percent - (int) percent >= 0.01 ? 0 : 3);
+				}
+
+				else
+				{
+					f = F.pc(percent, percent >= 0.01 ? 0 : 3);
+				}
+
+				L.i(C.GRAY + F.repeat(indent, index + 1) + "Object " + C.GOLD + i + C.GRAY + " at " + C.GOLD + f + C.GRAY + " (" + F.f(iris.getDimension().getObjectGroup(i).size()) + " variants)");
+			}
+		}
+
+		L.flush();
+		for(BiomeLayer i : children)
+		{
+			i.print(index + 1, indent);
+		}
+	}
+
+	public static BiomeLayer compile(IrisGenerator g, double scale, int octaves, Function<CNG, CNG> factory)
+	{
+		GMap<String, BiomeLayer> components = new GMap<>();
+
+		for(IrisBiome i : g.getDimension().getBiomes())
+		{
+			if(i.getType().equals(BiomeType.LAND))
+			{
+				components.put(i.getName(), new BiomeLayer(g, i));
+			}
+		}
+
+		GSet<String> deject = new GSet<>();
+
+		for(String i : components.keySet())
+		{
+			BiomeLayer b = components.get(i);
+
+			for(String j : b.getBiome().getParents())
+			{
+				try
+				{
+					components.get(j).addLayer(b);
+					deject.add(i);
+				}
+
+				catch(Throwable e)
+				{
+					L.w(C.YELLOW + "Cannot find Biome " + C.RED + j + C.YELLOW + " (" + C.WHITE + b.getBiome().getName() + C.YELLOW + "'s so-called 'parent'.)");
+				}
+			}
+		}
+
+		BiomeLayer master = new BiomeLayer(g, null);
+
+		for(String i : components.k())
+		{
+			if(deject.contains(i))
+			{
+				continue;
+			}
+
+			master.addLayer(components.get(i));
+		}
+
+		master.compile(scale, octaves, factory);
+
+		return master;
+	}
+}
diff --git a/src/main/java/ninja/bytecode/iris/util/ParallelChunkGenerator.java b/src/main/java/ninja/bytecode/iris/util/ParallelChunkGenerator.java
index 6a976feea..7fc6a7907 100644
--- a/src/main/java/ninja/bytecode/iris/util/ParallelChunkGenerator.java
+++ b/src/main/java/ninja/bytecode/iris/util/ParallelChunkGenerator.java
@@ -8,6 +8,7 @@ import org.bukkit.World;
 import org.bukkit.block.Biome;
 import org.bukkit.generator.ChunkGenerator;
 
+import mortar.logic.queue.ChronoLatch;
 import ninja.bytecode.iris.Iris;
 import ninja.bytecode.iris.controller.ExecutionController;
 import ninja.bytecode.iris.controller.TimingsController;
@@ -26,6 +27,7 @@ public abstract class ParallelChunkGenerator extends ChunkGenerator
 	private AtomicChunkData data;
 	private ReentrantLock biomeLock;
 	private TaskGroup tg;
+	private ChronoLatch el = new ChronoLatch(5000);
 	private boolean ready = false;
 	int cg = 0;
 	private RollingSequence rs = new RollingSequence(512);
@@ -84,7 +86,7 @@ public abstract class ParallelChunkGenerator extends ChunkGenerator
 					});
 				}
 			}
-			
+
 			plan.set(onInitChunk(world, x, z, random));
 			TaskResult r = tg.execute();
 			onPostChunk(world, x, z, random, data, plan.get());
@@ -102,6 +104,11 @@ public abstract class ParallelChunkGenerator extends ChunkGenerator
 					data.setBlock(i, 0, j, Material.RED_GLAZED_TERRACOTTA);
 				}
 			}
+
+			if(el.flip())
+			{
+				e.printStackTrace();
+			}
 		}
 
 		return data.toChunkData();
diff --git a/src/main/java/ninja/bytecode/iris/util/PolygonGenerator.java b/src/main/java/ninja/bytecode/iris/util/PolygonGenerator.java
index 921f46187..628583bd9 100644
--- a/src/main/java/ninja/bytecode/iris/util/PolygonGenerator.java
+++ b/src/main/java/ninja/bytecode/iris/util/PolygonGenerator.java
@@ -2,18 +2,23 @@ package ninja.bytecode.iris.util;
 
 import java.util.function.Function;
 
+import mortar.lang.collection.GList;
+import mortar.lang.collection.GMap;
 import ninja.bytecode.shuriken.math.CNG;
 import ninja.bytecode.shuriken.math.M;
 import ninja.bytecode.shuriken.math.RNG;
 
 public class PolygonGenerator
 {
+	private double[] rarity;
 	private CNG[] gen;
 	private int bits;
 	private int possibilities;
+	private boolean useRarity;
 
 	public PolygonGenerator(RNG rng, int possibilities, double scale, int octaves, Function<CNG, CNG> factory)
 	{
+		useRarity = false;
 		bits = 1;
 		this.possibilities = possibilities;
 
@@ -21,18 +26,30 @@ public class PolygonGenerator
 		{
 			bits++;
 		}
-		
+
 		bits++;
 		bits = bits > 32 ? 32 : bits;
+		rarity = new double[possibilities];
 		gen = new CNG[bits];
 
 		for(int i = 0; i < bits; i++)
 		{
-			gen[i] = new CNG(rng.nextParallelRNG(2118 + (i * 3305)), 1D, 1).scale(scale);
+			gen[i] = new CNG(rng.nextParallelRNG(2118 + (i * 3305)), 1D, 1).scale(scale / possibilities);
 			gen[i] = factory.apply(gen[i]);
 		}
 	}
-	
+
+	public PolygonGenerator useRarity()
+	{
+		useRarity = true;
+		return this;
+	}
+
+	public void setRarity(int index, double r)
+	{
+		rarity[index] = 1D - Math.pow(0.5, r);
+	}
+
 	public boolean hasBorder(int checks, double distance, double... dims)
 	{
 		int current = getIndex(dims);
@@ -42,8 +59,8 @@ public class PolygonGenerator
 		{
 			for(int i = 0; i < checks; i++)
 			{
-				double dx = M.sin((float)Math.toRadians(ajump * i));
-				double dz = M.cos((float)Math.toRadians(ajump * i));
+				double dx = M.sin((float) Math.toRadians(ajump * i));
+				double dz = M.cos((float) Math.toRadians(ajump * i));
 				if(current != getIndex((dx * distance) + dims[0], (dz * distance) + dims[1]))
 				{
 					return true;
@@ -55,8 +72,8 @@ public class PolygonGenerator
 		{
 			for(int i = 0; i < checks; i++)
 			{
-				double dx = M.sin((float)Math.toRadians(ajump * i));
-				double dz = M.cos((float)Math.toRadians(ajump * i));
+				double dx = M.sin((float) Math.toRadians(ajump * i));
+				double dz = M.cos((float) Math.toRadians(ajump * i));
 				double dy = Math.tan(Math.toRadians(ajump * i));
 				if(current != getIndex((dx * distance) + dims[0], (dz * distance) + dims[1], (dy * distance) + dims[2]))
 				{
@@ -67,21 +84,25 @@ public class PolygonGenerator
 
 		return false;
 	}
-	
+
 	/**
-	 * Returns 0.0 to 1.0 where 0.0 is directly on the border of another region and 1.0 is perfectly in the center of a region
-	 * @param x the x
-	 * @param z the z
+	 * Returns 0.0 to 1.0 where 0.0 is directly on the border of another region and
+	 * 1.0 is perfectly in the center of a region
+	 * 
+	 * @param x
+	 *            the x
+	 * @param z
+	 *            the z
 	 * @return the closest neighbor threshold.
 	 */
 	public double getClosestNeighbor(double... dim)
 	{
 		double closest = 0.5;
-		
+
 		for(int i = 0; i < gen.length; i++)
 		{
 			double distance = Math.abs(gen[i].noise(dim) - 0.5);
-			
+
 			if(distance < closest)
 			{
 				closest = distance;
@@ -94,13 +115,27 @@ public class PolygonGenerator
 	public int getIndex(double... dim)
 	{
 		int data = 0;
+		int adjusted = 0;
+		double[] noise = new double[gen.length];
 
 		for(int i = 0; i < gen.length; i++)
 		{
-			data |= gen[i].noise(dim) > 0.5 ? i == 0 ? 1 : 1 << i : 0;
+			data |= (noise[i] = gen[i].noise(dim)) > 0.5 ? i == 0 ? 1 : 1 << i : 0;
 		}
 
-		return data % possibilities;
+		if(!useRarity)
+		{
+			return data % possibilities;
+		}
+
+		double r = rarity[data % possibilities];
+
+		for(int i = 0; i < gen.length; i++)
+		{
+			adjusted |= noise[i] > r ? i == 0 ? 1 : 1 << i : 0;
+		}
+
+		return adjusted % possibilities;
 	}
 
 	public static class EnumPolygonGenerator<T> extends PolygonGenerator
@@ -113,6 +148,38 @@ public class PolygonGenerator
 			this.choices = choices;
 		}
 
+		public EnumPolygonGenerator<T> useRarity()
+		{
+			super.useRarity();
+			return this;
+		}
+
+		@SuppressWarnings("unchecked")
+		public EnumPolygonGenerator(RNG rng, double scale, int octaves, GMap<T, Double> choiceRarities, Function<CNG, CNG> factory)
+		{
+			super(rng, choiceRarities.size(), scale / (double) choiceRarities.size(), octaves, factory);
+			GList<T> c = choiceRarities.k();
+			this.choices = (T[]) c.toArray();
+			int m = 0;
+
+			for(T i : c)
+			{
+				setRarity(m++, choiceRarities.get(i));
+			}
+		}
+
+		public void setRarity(T t, double rarity)
+		{
+			for(int i = 0; i < choices.length; i++)
+			{
+				if(choices[i].equals(t))
+				{
+					setRarity(i, rarity);
+					return;
+				}
+			}
+		}
+
 		public T getChoice(double... dim)
 		{
 			return choices[super.getIndex(dim)];