This is some work i did on "Robinson the Journey" for Playstaion vR. I did rocks, level dressing and i was art owner for the level. Tar Texture: https://www.artstation.com/aaarts
Light: https://www.artstation.com/kurisuto
use in level
full render
different materials
gloss and normals
wireframe
small variations
bigger version
a lot of manual labour to get the tar flow around the Islands