That’s insanely impressive. I’m not even sure how to build something like that myself. It seems to just blend the geometry seamlessly! Is it some kind of texture applied over the top layer that also does a geometry shader to move the outer layer inward?
I was looking at DooM Eternal too.
I don’t know the details but it sounded like they had layers of clipped geometry and gore meshes. Somehow the gore just blends so amazingly there. It even seems to have concave areas so it’s not necessarily as simply as pushing the geometry in with a vertex shader, but I’d be OK with that since it sounds simpler.
What I’m not necessarily sure about is how to create such a texture mask over a character and have it follow the animated character. Simply projecting a decal onto a character won’t make that decal deform properly with the animation.
Maybe this will be helpful: Skeletal Mesh Texture Paint - Unreal Engine Tutorial (Blueprint Only) - YouTube