Ok, don’t mind the twistedness of the images, but it may be useful to someone with an idea on a work around: Image on the left- Genesis with M3 fit to her/him, using the Genesis mouth to open the mouth. On the Right, same Genesis, same M3 (Genesis hidden for clarity) but using the M3 Open Mouth morph. So it doesn’t appear it’s a geometry error, as much as it is a morph translation error. (The inner mouth and tongue on M3 seems to distort either way, though.
M3 brought over using 4.5, Auto-Fit using Genesis.dsf. Same results happened using a basic bodysuit, though- just the toes were messed up using the suit. Using the 4.5 Autofit, it has both the Genesis Morphs, and the M3 morphs.
Correction: Inner mouth works with using the M3 morph, it’s Teeth/ Tongue / and Gums that distort no matter which morph set you use.
Wait.. This may be all wrong, that may be an M4- Let me double check again, I’ll repost later. Either way, though, it’s the same distortion on the mouth areas, it seems, so most likely the same cause.