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Usually at the very beginning, we have a Maya animation rig which bind with geometries. Animation Character Rig (The rig ready for animation with geometries, joints and controllers)
Character Rig can be anything, FBIKlike FBX bone chain, Human IK, or any other kind of custom Maya joint/control system, or some commerial packages like TSM The Setup Machine or Advanced Skeleton.
We need to convert the Rig into Miarmy Assets Original Agent (OA) and bring OA into crowd production pipeline. General Pipeline