Problem to export biped model with extra bones

Questions & Answers
1

I made the biped model with extra bones.
I exported it to FBX, but I can’t act with extra bones.
Animation with biped bones was acted.
But animation with extra bones didn’t be acted.

When i export FBX from max file and then import FBX file, animation with extra bones didn’t be acted.

Thank you for your attention.
Help me!!!

2

the problem doesn’t come from 3dMax,
in Unity, select your character model and in property go to rig panel,
set it to be “Legacy”, and it will solve your problem.