Unreal has a specific joint naming convention that will speed up retargeting animation if that is part of your pipeline. You would do well to rename your skinned skeleton to match Unreal’s naming convention. I have listed the naming convention below. As naming conventions go, its not that strong. You will notice that it does not follow traditional naming convention rules in that there is not a standardization in capitalization but whatever.
neck_01 – one might assume that because this ...