Weld Command and UV map

[gap]

When UV mapping an object usually the best practice is do that when it's finished - that means - we are not to change its topology anyway and we are doing that if using Weld.

I understand, in general that's my workflow too, but in my example UV mapping the object before cloning and welding it n times, is critically more time efficient

Maybe Wings3D should to look for this kind of situation - I'm not sure how this work in other 3D apps.

Wings3D is my main modelling tool, but at times, when I need a to perform a task not supported by Wings, I post-process my models in other 3D applications. The free version of Softimage XSI has a better implementation of the Weld command imho. It doesn't weld faces but couples of near vertices, it works well on UV-mapped meshes, with no UV map corruptions, an there is even an option for welding UV projections automatically.