I don’t know either and I already spent way too much time searching for a solution without finding the “root cause” that it looks THAT bad. But as I wrote: When I once created my “own” skeleton that matches the UE4 one and retarget (to different skeleton) all animations to that one I can reuse that skeleton for all my characters (at least the two I tried and they were quite different in proportions), even with different proportions as shown in the docs. So there really only is that one step of retargeting all animations once and you are set. No idea why retargeting to same skeleton doesn’t work with Epics (probably the rotations as you guys mentioned) but it does with my own and that’s fine as the initial retargeting doesn’t take more than a few seconds.