Hi Andrei

As T-splines is now owned by Autodesk, I would prefer another option. I don't trust Autodesk. They are just trying to control the CAD market. I am sure they wont update tsplines for Rhino. It will be allowed to die a slow death. There is also Clayoo, which i have not tried , but I heard there are some problems in current version. I was hoping that http://www.npowersoftware.com/ would create a version for Rhino.