Yep, that's a function. But seriously: <brain> functionsofblenderiknowabout++ </brain> I don't really have a use for it know but the uv map looks really cool. I shall remember this. It also helps in my epic quest to know every single function of Blender. (stupid Blender 2.5, now I have to start all over again) Ps. I just remembered once for a personal project I've spend quite a while achieving the same result manually and in the end it didn't even look that good, I wish I knew about this then.