I need to import CAD files from a Unigraphics system. I tried having the CAD guy export as .dxf, but found that the edges were torn apart when two polygons met. The points on each surface were not close, and the resolution is too low. Although we could try increasing the data density of the .dxf model, I'm wondering if IGES would work better since it can handle NURBS and Beziers.

Anyone have any experience along this line … any suggestions?

Thanks,
Robert

I don't have an answer for you but I recall IGES discussed in the mailing list before. Try searching here:
http://www.sidefx.com/community/interact/mailarchive/ [sidefx.com]

Without a doubt, Wavefront .obj seem to be the most reliable “public” format out there that is widely supported. Often input into Houdini needs to be reversed. (ReverseSOP)