I'm importing a Wavefront OBJ file. The file contains a lot of duplicate vertexes, so I use the remove doubles functionality in Blender (from a Python script to be precise). Not doing so, gives problems later when using a subsurf modifier (distortion of the mesh).
With removing the doubles, the mesh is perfect, but the OBJ file also contains UV mapping (vt tags etc). After using remove doubles in Blender, the resulting UV mapping has holes. Several vertex mappings have disappeared, resulting in incorrect mapping of the textures to the mesh. Seems like UV mapping is not taken into account by the remove_doubles feature.
This seems like a fundamental issue of the feature, not specific for my model. Hence I was wondering whether there is a workaround/solution for this ... to have UV mapping corrected as well.
Thanks a lot.