DOH!! I hate when I ask a stupid RTFM question... although I did realize what was causing the mobius effect, I didn't know how to get the rectangle image....I got it now though. thanks for knocking some sense into me =c). BTW, this image was another experiment in global illumination. I used something like 6 or 8 lights total, but seem to have gotten a pretty decent result, without a major performance hit. I rendered using premium render settings: 4 rays per pixel, true ambience, and only took about 5 minutes.