By the way, the garment OBJs will be all-triangle. MD can do an automatic conversion to quads, but falls back to triangles at the seams, leading to rather messy results that the fitting room is not too happy with. I could retopo by hand and if I end up spending considerable time on conforming clothes, probably will eventually, but for now it's either find an easy automatic retopo workflow that produces clean results (and if you have one, please share) or leave it as triangles. I will make sure to produce clean UVs and shove the islands around a bit within MD to avoid wasting too much texture space. So, if that's good enough for you, you won't even need to touch the UVs, but of course you're always welcome to further optimize.

-- I'm not mad at you, just Westphalian.