Real Soft 3D 4.2
[URL=http://www.urob.de/index.php?para=107]Download Page[/URL]
Page is in german but prog is in english
You must clic on "Link zum Freischaltcode" then"Seriennummer Anforden" for obtain a free serial number Fill boxes then clic "angaben absenden"
Its a Nurbs / SubdiV Modeler with a renderer Nurbs!!!
(not yet tested just loaded :)
Seems only iges (for nurbs) format can be directly use with moi (if I found the pluging :)
Found one on the web http://www.deltaknowledge.com/revolution4d/index.php but not load it ;)
If someone know where we can load this last one?

Else 3ds exist :)

Manual is a model of pedagogic use !