Anyone know how to rig an “auto clavicle” for an IK/FK arm similar to this?
If so, I would appreciate knowing the trick please.
looking at the video frank it looks like they have set up an additional IK chain from the top of the arm to the chest to simulate the movement of the clavicle in relation to the arms movement from what I can guess from the quick video is that there are bone constraints on the clavicle to limit the movement. Its a very impressive rig i must say, the only thing i think looks off is when the arms are down the shoulders dont relax.
im intrigued to see the setup now 
I’ve tried several ways to rig an “auto clavicle” in an IK arm rig.
I’ve seen several on YouTube but never a tutorial on how to make them. (see one in first post)
The test.blend below is the best I have been able to do.
It uses the iTaSC solver with stiffness settings and a couple constraints to tame the clavicle from moving prematurely.
I intend to put a switch on the chain to make the clavicle move manually only also.
It still needs help but I’m just learning rigging so I’m just grasping at anything I can read or find.
If anyone would like to offer some direction on what more it needs to make it work for an animator and point me in the right direction, I would be grateful.
Examples and “how-tos” would be very welcome.
test.blend (717 KB)