My character model needs to change one of his mesh part
The new mesh part actually the old one with new UV and I want to copy vertex weight from old mesh part to new mesh part
Autoskin feature of Titan Engine work not so well and it cant be applied to whole skeleton as the hovering tool tip said (when no bone was selected)
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This leads to another question, how can I make character cloth has the same proximal vertex weight without painting weight pixel by pixel

There is no built-in method, but you can iterate all dest vertexes, then find nearest src vertex (with closest position and most similar vtx normal for example) then manually copy vtx skin attributes.

Yeah, I dont know how to modify the engine source because I am not familiar with it, so.. Can this be a feature request for the engine :"D this gonna be useful surely. I understand you dont want to do stuff that your game does not need, but please... :(