Can't get clothes to deform properly

Support Animation and Rigging
1

I’m using an MB Lab model with it’s base IK rig and some clothes I made. There’s no cloth modifier or collision. After parenting the clothes to the rig and transferring the weights from the body mesh to the shirt, I get the following result:

After
After1365×1633 107 KB

It has a shrinkwrap modifier, but when I remove it, I notice that the shirt sleeve just doesn’t move as far as the arm does. I assume that something is wrong with my weight paint transfer, but I have no idea what I did wrong. Does anybody have any ideas? (As a side note, I noticed that it doesn’t show different weights on the shirt after transferring them from the body, but it does move with the armature. It’s very confusing).

2

After struggling with this issue for days, I figured it out myself two hours after posting the question. What happened is that I made the clothes from the MB Lab base mesh, which copied all the vertex groups. When I transferred the weight paint like the tutorial told me to, it created a new set of vertex groups with the same name.001. Somewhere in all that Blender got a little confused. I solved the problem by deleting all the existing vertex groups and transferring again. This time it worked.