HI, I used Character Creator v4.51 and Unreal Engine v5.3.2
I import rigged data to Character Creator using Characterization (bone mapping).
And export with Animation.
But I try import that Skeletal mesh to Unreal engine, the bone doesn't match original rigged mesh, even manual or auto set up.
Always added rl_bone_root


This is my original bone.
.
76% of original size (was 664x19) - Click to enlarge

When I import, bone doesn't merge pop-up
76% of original size (was 664x19) - Click to enlarge

When I don't merge bone,
76% of original size (was 664x19) - Click to enlarge


Auto set up.
76% of original size (was 664x19) - Click to enlarge


I checked Use T0 As Ref Pose option.

What is the rl_bone_root. How Can I use CC animations with original bone. Plz help me.