depending on how much you have loaded into the scene, figures, textures, bump maps, etc.. what I mean is how "intense" or memory intensive your scene is. Poser will freeze up when trying to render. Unfortunatly I don't think anyone has come up with an easy fix for that one except maybe maxing out your RAM. Which I beleive poser will only recognize up to 512MB. Apparently Win NT and 2000 seemto have less of this problem. Hope this helps somewhat. Regards, mitharndir2K