I have human model generated with Human Generator addon. Next I import bvh I recorded on Deepmotion and retargeting its bones to my model bones with awesome Renim Node addon. And here is the problem, retargeting is good, except hands part. You can see on the screen it's not even intersection, hands bones of the model clearly don't follow the bvh armature. I've tried set offsets inside Renim bone nodes, but it's impossible to get something good this way. I've tried it on both metarig and rigify, all the same, all good, hands are bad. Rotation on both human and armature is quaternion. Maybe someone faced same problem and can point me to the solution?