ocham you found my dirty little secret my obj reader truncates multifacted polygons to quads. I KNOW I should tesselate them. I hate to admit this, this is my FIRST graphics program and only my SECOND MFC/C++ program. I have a lot to learn. I can't program on a MAC, but from a programming standpoint, a MAC port would take about a week. This is an OpenGL app,and OpenGL is the same whether mac, linux or windows. if you know any MAC opengl people, ask them.