Skeleton Retargetting causes improper bone placement

[RadThadd]

Godot Version

4.3

Question

How do I transfer animations from one skeleton, to the next? Cuz I have a makehuman model with a skeleton on it that is "unity compliant" and a few animations from a Unity asset package. I've used the skeleton profile feature in Godot for the import of both models and tried tinkering with various settings, but I still can't get the skeleton to do right on the destination model/scene

[jesusemora]

Hi, I explain the 3D retargeting workflow here:

3D Character Animation Workflow

mixamo has problems with custom skeletons. try renaming all the bones to the ones used by mixamo, and make sure to add mixamorig:. so for example, the head would be something like mixamorig:Head. and make sure there is no Root bone, only Hips, it exports bad into fbx. nononono. 1 - all you need is your character in T-POSE. the rest doesn’t matter. use a mixamo model in mixamo and download all the animations one by one into folders. use fbx binary and only animations. you can download one f…

[RadThadd]

I’m not using Mixamo, I’m using MakeHuamn

[RadThadd]

Also, I’ve tried converting the FBX to glb/gltf files in Blender and the results were the same - and followed these directions as closely as possible - to no avail

[jesusemora]

sorry for the late response.

@RadThadd

I’m not using Mixamo, I’m using MakeHuamn

same thing. all that matters is that the skeleton is humanoid.
the mixamo workflow is similar because it also uses FBXs and a T-POSE model.

@RadThadd

I’ve tried converting the FBX to glb/gltf files in Blender and the results were the same - and followed these directions as closely as possible - to no avail

could we get some pictures?

if the animations work but the arms go in the wrong direction, the problem is that the skeletons are different, the roll could be different, they could be rotated slightly, too apart, non-symetrical. or the simplest: one is in T-POSE, the other is in A-POSE.
this last one is probably what’s happening. you need to set your makehuman model to T-POSE, since the default is A-POSE.

the structure of the tree also has to be the same, if you have root->node3D->skeleton in one, the other has to be the same, it can’t be root->Node3D->Node3D->skeleton.