Rig Space simulation can add detailed motion to an existing animation.
Source code: https://github.com/league1991/RigFEM
Simulation result:
Input Animation:
The high res. mesh will drive the low-res mesh.
Simulation is performed in a low-res mesh (the gray one will wireframe on it), resulting in an few animating rig parameters.
The rig parameters will drive the high res. mesh.
