I have been having trouble getting the lips of my rig (created with the Rigbits facial rigger) to follow the rest of the standard biped mGear rig, when being driven by keyframes or mocap with Human IK. I found Chris Lesage’s script on this post- Lips rig do not scale properly and have run it on the rig. So they’re now constrained to the head joint. It works fine if I translate or rotate the head joint or the entire character, using the controls. It’s only once the bones are attached to the hik system that the lips get left behind. Does anyone know what the problem could be?