How to subdivide without to loose the UV?

[kev.r (Kevin)]

@Micha

For a test I installed my very old and seldom used Ultimate Unwrap3D and interesting is - there I can weld the mesh without to destroy the UV and divide it also without destroying the UV.

You can do this in Blender and ZBrush as well. It seems that Rhino handles UV’s differently. (I used Blender to subdivide your mesh in my first post above).