How rotate some bones over the animator?

I'm trying to rotate some bones in separate way respect the active animation.
I mean for example rotate a shoulder bone in addictive mode respect the animation using directly the transform.rotation inside the C# script.
I tried to mask the bones in some animator layers,make the rotation in LateUpdate() , but the animator always overrides my rotations.

Exist a way to take a control or override upon the animator?

 

Any modifications you make in LateUpdate will take effect for that frame only, then next frame the animation will be applied to the bones again so if you want to keep your modifications you need to apply them again every LateUpdate.

 

Thank you, you are right, my test code fail because i'm not always write the rotation in lateupdate().
I just discovered UnityEngine.Playables, i mean animator.BindStreamTransform() & C.
This should allow to handle directly some bones inside the animation.
The examples use a fixed animations as inputs , I was wondering how to connect the normal animator output instead a simple animation so you can use all animator states and layers, Is it possible?

 

That's part of the Animation Jobs system which I don't really know much about, sorry.