Well I have a terrain engine that generates itself from a 2d perlin noise function. I learned about it from here: http://freespace.virgin.net/hugo.elias/models/m_perlin.htm . Anyway, I was wondering how I can use the interpolation of it, Currently my code just loops through the x''s and y''s of the grid to get the z value, which is returned. Do I need to pass it floating point numbers that increment smaller to get higher detail. The reason I ask, is the way I implemented his psuedo code, it would require a lot of tinkering to change it. Thanks allot