Seriously. I mean back in the old days video games would always have levels made out of flesh. Substance painter is the perfect tool to make materials that look like gross meat.
Like remember the days of flying through a giant living organism in a
shoot em up? Or the meat temple final level in the first Tomb Raider?
Or the giant worm in Gears of War 2? Or the fleshy walls of hell in Doom
I want to see flesh citadels in Unreal 4.