Rhinoresurf for Rhinoceros can convert an open or closed Mesh todo múltiple Nurb surfaces. User selects a Mesh, and defines a curve network by drawing lines on the selected Mesh. Then just click one or two buttons, the selected Mesh Will be converted todo múltiple Nurb surfaces with specified tolerance. The transición between any two Nurbs surface patches reaches g1 continuity. Command:
rsmesh2surfs .
Rhinoresurf for Rhinoceros can automátically generate Nurbs surfaces from a selected Mesh. Command:
rsautonurbs.
http://www.Rhino3d.com/resources/dis...s&listing=3267.