implementation compiles now

common/api/src/main/java/com/dfsek/terra/api/handle/WorldHandle.java

@@ -12,6 +12,8 @@ import com.dfsek.terra.api.vector.Vector3;
 public interface WorldHandle {
     BlockState createBlockData(String data);
 
+    BlockState air();
+
     EntityType getEntity(String id);
 
     /**

common/api/src/main/java/com/dfsek/terra/api/world/biome/Generator.java

@@ -29,13 +29,7 @@ public interface Generator {
 
     double getWeight();
 
-    /**
-     * Gets the BlocPalette to generate the biome with.
-     *
-     * @return BlocPalette - The biome's palette.
-     */
-    Palette getPalette(int y);
-
+    PaletteSettings getPaletteSettings();
     NoiseSampler getBiomeNoise();
 
     double getElevationWeight();

common/api/src/main/java/com/dfsek/terra/api/world/biome/PaletteSettings.java

@@ -0,0 +1,7 @@
+package com.dfsek.terra.api.world.biome;
+
+import com.dfsek.terra.api.world.generator.Palette;
+
+public interface PaletteSettings {
+    Palette getPalette(int y);
+}