I’m having some issues trying to get the exact unwrap for organic products.
If the model comes from Modo, where you can edit the UV in hard and soft mode with the same number of points, you can see that it looks perfect in the native program, but once you import it in Rhino, the UVs are preserved but don’t look right when you convert the mesh to SubD.
The other problem is that the UV Editor doesn’t let you edit the UVs in Soft mode, it only remembers the original UVs that probably create that strange look on the soft surfaces.
I don’t know if there is an option when you convert the obj to subD that gives better results.
The other way to deal with this was extracting the control poly from the obj in Rhino and do the unwrap again. The result is much better, but it comes with a new problem, the UV editor shows a subdivided version of the SubD that makes the adjustment of points far more complicated than with just the real control points.
What do you think?