I've been having this problem for some time now and have gotten around it by tinkering with renderings in photoshop to get things right, but its just becoming too much of a hassle. Hopefully somebody can help me out with this:
I do a lot of 3D modeling, and use the 3D modeling tool sets as much as possible. In many cases, once I've created my geometries, they look just fine in wireframe and render perfectly in openGL, but appear to by a jumbled up mess of triangulated surfaces and polygons when i try rendering them with Final Quality or Custom RenderWorks.
I'm very diligent in ensuring that all my surfaces for extrusions are closed surfaces, and have even run a test render just using the sphere tool from the 3D modeling set and I still get this problem about 75% of the time - even if I try it in a new, blank file. Can anybody shed any light on this problem? Any help would be greatly appreciated!