Metahuman with effects - but good ones, possibly materials/displacement based?

I have a game project based on Lyra, and I’ve imported Metahuman and worked together with it.

I want to make an effect where the entire body is on fire, and perhaps even watery-like.

Looked online and saw many tutorials on adding flame-body with Niagara. I tried that, but honestly it doesn’t look that good. Also because of the way metahuman works, I had to create 3 systems; 1 for the body, 1 for the face, and 1 for the legs (the legs had clothing, the top has a Chaos Cloth).

I did found online this demonstration from epic: UE4 Tools Demonstration | GDC 2014 Event Coverage | Unreal Engine

And those effects look really good, exactly what I want. However:

  1. Most importantly - I can’t find them. I’ve created the UE 5.4 content example - but those specific ones don’t seem to exist there!
  2. I’m not sure how easy it would be to add that to metahuman, since they have a very complicated materials. And again, multiple materials.

What do you guys recommend then?