@liondog: i asked the same on Mixamo forum, the problem is that some joints are not skinned,
“lowerarm_twist_01_r/l”
and
“upperarm_twist_01_r/l”
so you must do it your self in a 3d modeler soft like blender, max, modo etc. I am making other thing for my project so I did not have time for that yet.
From mixamo forum:
“We’re aware that the twist joints currently have no skinning. We add the joints in but you’ll need to manually adjust the skin weighting there as our auto-rigger doesn’t currently give them weights.”
And due Mixamo was bought by Adobe, I think this will be this way for a long time.
@n00854180t: hey thanks for this, i will check it !