

Both versions are just the skinned mesh Tposing. Their only difference should be adding two 40Kb files (books) and two 100Kb files (pickaxes) with their respective single bone. The mixamo version is 1.20Mb while the badly performing one (ill call it blender version to make things easy) is 3.12Mb.

So, upon further inspection this is what I found: Then, because I wanted to add the equipments, I imported the skinned mesh to blender and added the 4 items with one bone each and exported again (this is the badly performing one). Then it was exported to mixamo and redownloaded but now as a skinned mesh (this is the “good performing” one). They had a sort of hierarchy, where meshes belonging to the face were presented as its children. The original model was made in blender, meshes only.

Before I say anything else, just a bit of context.
