1645e8d287
After extensive testing, I've concluded that VisualRot keyframing didn't work at all for bones. On the other hand, VisualRot for Objects worked fine. Now I've come up with a fix, which should make this actually work for IK/FK switching (I hope). The fix I'm committing is slightly hacky as it tempolarily overwrites the bone's rotation/quat values with the 'visual' ones, inserts keyframes, then resets the values it wrote on before. This hack was needed as for some strange reason, the values being added as keyframes were not the ones that had been derived. Note that on some bones, there will be a little bit of strange rotation after frame changes while their constraints are left on.