@**DenRunner**Thank you for the LODs solution, I really thought it was not related to that because unchecking Level of Detail on export does not work. I’ll report this as a “bug”.
@getyamamout
**
**
That’s weird, for me the materials don’t import unless I repair the FBX with the tool. Without repairing, I only get the Vertex Groups. I use Blender 2.91
I did not know about this mask with holes technique. I’m making a characer creator for my game, and I never intended to do face Mocap, I was going to sculpt facial expressions manually. But then when I saw metahuman, I realised that it would be much better to use their system. I still don’t know yet if re exporting to UE4 after modifying the model would not break everything, and if we also need to move the face bones when we modify the mesh. If you want to make the system work in Blender, maybe there’s a way to write a script that connects the bones to the shapekeys.