/3/ - 3DCG

>>469301
seperate meshes can be part of the same mesh without being connected. So you could model each claw separately and hide it inside each finger, then use a second tip bone to drive each claw out of the finger. They would still be combined with the character mesh but be skinned individually.
You could also have lots of edge loops squashed up tight, extruded from the tip of the finger, and have a bone extended from the tip that stretches those loops out to be longer, but that would cause the texture to stretch, which might be a problem depending on the detail of the texture.
Or you could do something like pic related, where you would get some texture around the claw stretching really bad when retracted, but you wouldn't see it so it doesn't matter, and it would look normal when extended.