...
The Animation Retargeting in Atoms is possible thanks to the characterization of the Agent Types.
A characterization consists of tagging the skeleton's joint chains of the skeleton by type, subtype, position and posing the rig in a reference pose.
Atoms will transfer the chains' animation of the chains with the same tag set if any matching chain is found during the simulation.
You should always start this process from the scene that you used for exporting the agent type.
Before configuring the joint chains, users should pose the rig in the reference pose, normally the T-pose. Make sure Ensure that all the characterization files of your agents (sources and targets) are exported fitting the same reference pose: the more similar the reference poses, the better the retargeting is going to will work.
All joints not belonging to a chain will not be considered during the retargeting process.
...
Root and effector types transfer rotations between characters.
ClavicleThe clavicle, pelvis, limb and spine also transfer rotations if the chain has less than two joints; otherwise, they use an IK algorithm.
...
From Atoms 4.0, you can set a pole vector for your chains. If no pole vector is provided, an automatic pole vector will be evaluated automatically whenever possible. A pole vector should be provided by the user whenever the joints of any limb joints are on a straight line in a bind pose or within an animation.
...