I had a chance to convert a Hexagon model into a TSpline polysurface model in R4. The whole process took 15-20 seconds with a single mouse click
(see the picture for results). Once converted to TSplines, most of Rhino's Nurbs modeling toolset can be used to model it further. and also the Tspline polysurface can be edited much like a subdivision surface (using face extrusions, point editing, tesselating, etc)... It seems the TSpline modeling toolset is very early beta, so it is limited as a full modeler (this is my conclusion after reading the documentation for the Maya TSpline plug-in). But once the full toolset is built, TSplines will become a powerful method to model organic objects in Rhino. The fusion of Nurbs' precision with Subdivision's freedoms. I'm very excited about it...
