While the metahuman characters for Unreal Engine are really gorgeous out of the box, I was wondering whether it is possible to add some custom textures to the face. It would be great to add some scars and face paint, or transform the character into an alien-like humanoid. 

Well I figured it out. 🙂

Watch the tutorial if you want to know how it can be done quickly and easily using Substance Painter. (You can most certainly also use a different texturing software like Quixel Mixer or Blender, or even Photoshop or Krita).