Hi
Look at 3D "sPatch" models imported into spline-based VRML in
http://www.ipm.sci-nnov.ru/~demidov/VRML/Splines/Splines.htm and
http://www.ipm.sci-nnov.ru/~demidov/VRML/Splines/Gal/Gal.htm
I made too a small converter from "RenderMan" format into VRML
http://www.ipm.sci-nnov.ru/~demidov/VRML/Splines/Model.htm
Evgeny