http://www.zwsoft.com/forum/viewthread.php?tid=931 Hi All, here is a link to <a target=new class=ftalternatingbarlinklarge href="http://www.integrityware.com/tutorials/SubDNURBS_short.mp4">Integrityware.com</a> who have software for converting Sub D polygon models to NURBS. It looks to me as though there is now a pathway for CAD to use those model in a full NURBS CAD environment. I think the future for CAD is that the ability to model how you want is getting closer. Cheers mudcrab 2011-03-07 16:01:09