I'm not at home so I can't test it out, but try playing around with the camera's clipping plane.
It's just a wild shot in the dark and the first thing that came to mind when I saw your screenshot.
Edit: Sorry, forgot to mention...If your camera has a really low clipping plane and a really high clipping plane, it can cause rendering artifacts to appear. If I remember right, it has something to do with the mathmatical equations trying to determine the dept if the clipping range is really far apart.
Don't be satisfied with what you can do but rather strive to do the things you can't do!
Last edited by Perfecto : 12-03-2009 at 06:54 PM.