Hi,
Im writing my Thesis too and have a similar problem. Your problem looks like, you dont have connected your upperLeg right. So your knees are moving the right way, but your upperLeg dont. Have you already fixed this problem?
Can you help me with figuring out, how to send the data from motive to unreal 4? Now I just have the newest Plugin from optitrack to unreal, but it just supports rigid bodys, and no full skeletons.
thanks and best