Thanks a lot for this step by step guide! It really helped defining a MetaHuman pipeline for Blender.
Unfortunately I am having an issue when reimporting the head mesh and I do not understand why:
the vertex count is not matching the original mesh one even if I did everything correctly and I just shaped differently the existing vertices without adding or more in any way.
Morphs are intact and everything looks like working as intended until I try to use the modified head mesh in the MetaHuman sample scene. The face is not reacting to the face animation sequence and I fear that this could be related to the vertex count mismatch.
Were you able to use the modified head mesh for motion capture or in animated sequences?