Problem with Mixamo animations after adding root bone in blender

[mzaleczny]

Hi,
I have problem with Mixamo Root Motion Animations - after adding root bone in Blender 3.5.1 with Mixamo Plugin (look at attached picture) produces animation that flickers as on attached video. Only unsetting all three options “Use X”, “Use Y”, “Use Z” produces stable and smooth animation but in the case option “EnableRootMotion” in Unreal Engine Editor does not have any effect. Does anybody knows how to solve the problem?

[Astaraa]

Try Terribilis’ Mixamo Converter
It has been successful with every Mixamo animation I’ve tried.

[mzaleczny]

Thanks for the reply. I tried the app out but it seems it does not add a “Root Bone” (which is parent for the Hips bone) to the skeleton. I need animation that contains that “Root Bone” (like in Echo Skeleton from Ancient Valley project). On the other hand “Enable Root Motion” works with generated by the app animations so I will do a research if it satisfy my needs.

[mzaleczny]

I found solution for everyone who has similar problems with corrupted animation after adding root bone to mixamo animation fbx file by a blender mixamo plugin. The cause of the problem is too new version of Blender - the plugin does not properly work with the newest one. I have a version of 3.5.1 and that was the problem. After installing Blender 2.80, the plugin does its work and root bones are added perfectly.

[Astaraa]

It does add a root bone.
It provides everything for root motion to work properly.
Assuming all the steps are followed.

[MostHost_LA]

So… if you get the naming right, blender exports the Armature as the root once you import into unreal.

Instead of messing around with plugins, one can easily rename the armature and export the fbx in order to import the new skeleton with a root bone…

This is in no way desierable 90% of the time, right?
But you could re-export the mesh, get it back into blender, and have a physical root bone to sync up.

With some minimal work (copy nodes mostly) you can bake the old animation onto the new skeleton and instantiate new keyframes to mod the animation out…