I have strange problem, when I have added rig to feather in two last feather in pose mode, then I make move, not all of fe...

posted to: Mesh Skinning
I have strange problem, when I have added rig to feather in two last feather in pose mode, then I make move, not all of feather go with move but two pieces of the feather stay in previous position. It is one mesh, weight I think is ok so how to fix that?