UV’s are part of the full surface, not the trimmed surface. A nurbs surface is made up of a UV grid, when you trim a surface you do not trim this UV structure, it is just hidden.
Thanks a lot for the reply!
I understand your point that the UV mesh is built on the untrimmed surface.
But how did the mesh in the first picture occured???
If it is the case, i would suppose that also in undeformed geometry, the UV mesh would extend beyond the surface.
Is it true?
Could you state if the difference in the 2 cases is reasonable.
(In the initial geometry the mesh does not go beyond surface
In the updated geometry the mesh goes beyond surface)
If it is impossible to help me further without files, it is understandable.