public void Create_Chunk(int x, int y, int z)
{
WorldPos world_pos = new WorldPos(x, y, z);
GameObject new_chunk_object = Instantiate(chunk_prefab, new Vector3(x, y, z), Quaternion.Euler(Vector3.zero)) as GameObject;
Chunk new_chunk = new_chunk_object.GetComponent <Chunk>();
new_chunk.pos = world_pos;
new_chunk.world = this;
chunks.Add(world_pos, new_chunk);
var terrain_gen = new TerrainGen();
new_chunk = terrain_gen.Chunk_Gen(new_chunk);
}