Well, like I said, my plugin is an external renderer for baking textures. My users will likely have no clue about UV unwrapping. Unfortunately the situation is that I can’t guarantee the user doesn’t have overlapping UVs but a lot of the time the UVs generated by UE could be improved very easily by at least reducing the padding or better yet indicating areas of importance. It’d be nice to unhook it from the lightmap UVs as well, as that has the possibility of being regenerated and needlessly invalidating baking results.
I’m going through the code now so if I find anything useful I’ll post it. I find a lot of the time the top google result for questions I ask is the question I asked. 