Dear masters of modern technology!
Setup:
- mGear 5.3.5
- Maya 2026
- Unreal Engine 5.8 (tested several versions)
- FBX Export (tested all versions)
- Unreal Import FBX animation (tested all options)
Problem: Elephant trunk rotation glitches in Unreal.
I’ve tested both Spring_Chain_01 and Spring_Chain_Gravity.
Everything works perfectly in Maya. There are no twisting issues during animation.
FBX export anim file itself seems perfectly fine.
The animation curves don’t have any gimbal lock issues either.
In previous smaller projects and with other characters, I managed to work around this by disabling matrix rotation on the problematic joint and slightly adjusting the animation. It wasn’t ideal, but it was manageable.
However, my current character has an elephant trunk that frequently suffers from rotation glitches in Unreal.
I’m posting here hoping someone has experienced the same issue and found a brilliant solution! 
Thanks in advance!