diff --git a/src/main/java/ninja/bytecode/iris/generator/IrisGenerator.java b/src/main/java/ninja/bytecode/iris/generator/IrisGenerator.java
index 89ad00f29..408268089 100644
--- a/src/main/java/ninja/bytecode/iris/generator/IrisGenerator.java
+++ b/src/main/java/ninja/bytecode/iris/generator/IrisGenerator.java
@@ -133,7 +133,7 @@ public class IrisGenerator extends ParallelChunkGenerator
 	public void onInit(World world, Random random)
 	{
 		this.world = world;
-		rTerrain = new RNG(world.getSeed() + 1024);
+		rTerrain = new RNG(world.getSeed());
 		glBase = new GenLayerBase(this, world, random, rTerrain.nextParallelRNG(1));
 		glLNoise = new GenLayerLayeredNoise(this, world, random, rTerrain.nextParallelRNG(2));
 		glBiome = new GenLayerBiome(this, world, random, rTerrain.nextParallelRNG(4), dim.getBiomes());
@@ -159,6 +159,8 @@ public class IrisGenerator extends ParallelChunkGenerator
 				}
 			}
 		}
+		
+		L.i("Signature = " + world.getSeed() + " + " + glBiome.getBiome(0, 0).getRealBiome().ordinal() +" + "+ computeHeight(0, 0, new ChunkPlan(), biome("Plains")));
 	}
 
 	@Override
diff --git a/src/main/java/ninja/bytecode/iris/util/ParallelChunkGenerator.java b/src/main/java/ninja/bytecode/iris/util/ParallelChunkGenerator.java
index cec77c617..2315f3dff 100644
--- a/src/main/java/ninja/bytecode/iris/util/ParallelChunkGenerator.java
+++ b/src/main/java/ninja/bytecode/iris/util/ParallelChunkGenerator.java
@@ -53,17 +53,14 @@ public abstract class ParallelChunkGenerator extends ChunkGenerator
 				genPool = Iris.getController(ExecutionController.class).getExecutor(world);
 			}
 
+			if(this.world == null)
+			{
+				ready = false;
+			}
+			
 			if(this.world != null && world.getSeed() != this.world.getSeed())
 			{
-				for(int i = 0; i < 16; i++)
-				{
-					for(int j = 0; j < 16; j++)
-					{
-						data.setBlock(i, 0, j, Material.YELLOW_GLAZED_TERRACOTTA);
-					}
-				}
-
-				return data.toChunkData();
+				ready = false;
 			}
 
 			this.world = world;