ouch, that's a difficult one.
I'm sure there's a simple answer, but I'm still looking for it myserlf, lol ....I've run into bugs and glitches when editing the weight map in cc3 for too long.
the best results i've had so far with issues like that depended on the tpose - where arm weight is distributed relatively to how the character will be used.
For example...first of your picture is hard T Pose - 2nd image is an A - pose - maybe try transferring weights on an a-pose instead of a hard t-pose so the weights are transferred relatively to the pose - not a far stretch.
then for the rest of the "natural" look, I'd look into cloth physics so the lace part can bounce around depending on pose.
with cc3, I've found the more you try to manually fix weights, the worse it gets, so if you can't fix something easy in say 15 minutes - reset and try a new approach... sometimes you have to trick the software into getting it right heh! One example of tricking the program is making the mesh smaller during weight transfer, then making it big again when "conforming" or other way around, make weight map too big or small then shrink or enlarge it with conform..
Good luck
☯🐉
"To define Tao is to defile it" - Lao Tzu
Edited
4 Years Ago by
planetstardragon