>>2849950>by setting a negative value (e.g. -0.03) to "Panties collapsed" morph.Nice, I didn't know you could that. That eliminates the need for a separate vertex morph. Should also work for the bikini (and swimsuit although I haven't noticed any clipping with it).
Thanks for testing! I fixed that particular issue since then, it was another SDEF coefficient problem, although re-SDEF'ing everything turned out to be a mistake, since now her thighs deform in a weird way sometimes... I swear, I'll get to the bottom of the SDEF black magic at some point.
Anyway, I hope you didn't get too attached to the placeholder pink underwear texture because I've replaced it with light blue from the swimsuit... but you can always replace the UV_underwear file I guess.