Rhino - Polygons to NURBS

How do I change a net of polygons to NURBS? Stefan

If the polygons are all coplanar, then DupBorder followed by PlanarSrf will get you a surface(s). MeshToNurb will make each polygon into a trimmed plane only useful if the model is quite simple in general. Beyond that, you can try T-spline in V4, I do not know if that will fill the bill in your case, or SMURF or of course more complex 'reverse engineering' surface building strategies using Rhino's tools. -Pascal