I’ve got a question that is worrying me for about a time already. How do you mirror and overlap UV-island in the model. I mean straight in the editing mode (this is crucial in my situation). I know that you can join detach a part, unwrap same part, join as uv, mirror detached part and apply scale. This question is more on the blender’s functionality I suppose.
So, you have a model with a couple of same UV-islands which needs to be mirrored and overlapped. What do you do?
At the moment, I mirror an island, rotate it, snap by a vertex, then weld vertices one by one as you can’t really guess the rotation of the other island. Very exhausting I must say.