Solved Set biome while generating the world?

For private use I try to manipulate the CleanroomGenerator to generate chunks with a specific biome only.
For that to work I added this to the CleanroomBlockPopulator:

Code:java

chunk.getBlock(0, 0, 0).setBiome(Biome.DESERT);

[/syntax]
I also tried

Code:java

    	for(int x = 0; x < 16; x++)
    		for(int z = 0; z < 16; z++)
    			chunk.getBlock(x, 0, z).setBiome(Biome.DESERT);

as well as

Code:java

        for(int x = 0; x < 16; x++)
        	for(int y = 0; y < 256; y++)
        		for(int z = 0; z < 16; z++)
        			chunk.getBlock(x, y, z).setBiome(Biome.DESERT);

But it doesn't work. What am I doing wrong?

Never mind, the CleanroomGenerator returns a empty populator list if no data values are specified. I removed that ad now it's working.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.