Hi. As anticipated, we published a short video that should help when encountering retargeting issues (e.g. with the shoulders):
https://.com/watch?v=soEEw4oS7no
In the video we show two techniques. The first method 1:41] consists of modifying the computed Animation Retargeting Pose to better fit the character morphology. Remember to save the new Animation Retargeting Pose at the end: select “Modify Pose”, “Use Current Pose”. Now it will be used for your next retargetings. The second method 4:43] consists on modifying the retargeted animation, manually tuning the skeleton. You must save the modified Animation selecting “Create Asset”, “Create Animation”, “Current Animation”, “Preview Mesh”.
Please remember that animation retargeting is a sort of an “hack”: it adapts an existing animation to another model, and morphological differences imply errors. The proposed techniques can be used to quickly improve the end results.