It isn't perfect? That's pretty sad. As a long-time 3D programmer, I'd have to say from experience that backface culling is the EASIEST thing to do, ever, in 3D graphics (if the polygon's normal is at an angle greater than 90 degrees from the camera LOS, it's culled). It takes a simple, well-known, very well-documented algorithm to do it correctly every single time. How could they screw that up? If they want, I have a book from 1988 that explains really simply with C code. ;0) BYS