SkyRider worldgen code

    public byte[][] generateBlockSections(World world, Random random, int ChunkX, int ChunkZ, BiomeGrid biomes){
        byte[][] blocks = new byte[world.getMaxHeight() / 16][];
        int x, y, z;

        Random rand = new Random(world.getSeed());

        SimplexOctaveGenerator octave = new SimplexOctaveGenerator(rand, 12);
        SimplexOctaveGenerator octave2 = new SimplexOctaveGenerator(rand, 8);
        octave.setScale(1/48.0);
        octave2.setScale(1/8.0);
        for(x=0; x < 16; x++){
            for(z=0; z<16; z++){

                biomes.setBiome(x, z, Biome.SKY);

                 int real_x = x+ChunkX * 16;
                 int real_z = z+ChunkZ*16;

                for(y=0; y<255; y++){

                    double threshold =  0.8;
                    double threshold2 = 0.91;

                    //for some reason this breaks Multiverse2
                    if(y < 96 || y > 224){
                        threshold2 = .99999;
                        threshold = 1;
                    }

                    double noise = octave.noise(real_x, y*2, real_z, 0.5, 0.5);
                    double noise2 = octave2.noise(real_x, y/2, real_z, 0.5, 0.5);

                    if(noise > threshold || noise - noise2 > threshold2*2){
                        setBlock(x, y, z, blocks, Material.ENDER_STONE);
                        setBlock(x, y+1, z, blocks, Material.DIRT);
                        setBlock(x, y+2, z, blocks, Material.GRASS);
                    }
                }

            }

        }

        return blocks;
    }