I use CC3 and Blender 4.5. Can I transfer weights in pose mode? I have a cloth. I have to edit my cloth mesh to fit the armature rest position. It is easy to have a pose to fit my cloth before transferring weights. Is it possible?
It depends. If it’s way too different from the rest pose, then it may not work well when you change poses or animate it. Better make an effort and fit cloth to the rest pose.
If you have Marvelous Designer or similar, you may simulate from pose to rest with animated avatar, import cloth back to CC or Blender and then transfer weight in rest pose.