But, of course, that assumes that the rig for the hand matches whatever rigging system your pipeline currently uses. If you've got a hand rigged with a skeleton

But, of course, that assumes that the rig for the hand matches whatever rigging system your pipeline currently uses. If you've got a hand rigged with a skeleton based system (see: every IK/FK system under the sun), but your pipeline uses a fully deformer based rigging system (see: Pixar's system), that hand is still no good to you. Once you start going down the CG pipeline rabbit hole, you begin to realize just how far it goes.