@Override
public void registerBiomes() {
// if you want to check out a particular biome, use this!
//setSelector(new PerBlockBiomeSelector(VanillaBiomes.TUNDRA));
setSelector(new LayeredBiomeSelector(buildSelectorStack(1), VanillaBiomes.OCEAN) {
@Override
public Biome pickBiome(int x, int y, int z, long seed) {
int hash = x * 2345803 ^ y * 9236449 ^ (int) seed;
hash *= hash + 223;
int xNoise = hash >> 20 & 3;