Thanks for all the good ideas, guys. Actually, my heightmap is more of just an array of integers, so I'm not really restricted to 256 heights. I did this for the very reason that Rob mentioned. I also was thinking though, about IPete's commment about blurring the heightmap in Photoshop. The thing is, I can't blurr my array in photoshop, but there must be some sort of algorithm that I can run on my array that would have the same effect. Does anyone know anything about heightmap blurring that might help me write such an algorithm?