Following a substance designer tutorial, I've made my own rock wall parametric PBR material. It can change rock numbers, mortar level, roughness level, HSB levels and a random button.
4k Marmoset render
Substance Designer Graph
Textures Output
Marmoset render v00
Marmoset render v01
Marmoset render v02
Marmoset render v03
Marmoset render v04
Marmoset render v05
Unreal Engine 4 render v00b
Unreal Engine 4 render v01b
Unreal Engine 4 render v02b