I've been working on this pregnant model. I'm trying to create a set of magnets, so that clothes will be able to conform to pregnant models. Anyway, when I started rendering I got that weird line across the stomach. First I thought it was the lighting. But as you can see in this pic, she is lit from below as well as above. Then I thought it was the texture on the biker shorts so I got rifd of it and just left the shorts transparent. Then I thought maybe it was the shorts themselves. Removed the shorts and the line was still there. Then I thought maybe it was the magnet. But magnets don't cast shadows. Then I thought it was a texture problem. Nope. I'm at a total loss here.