Thank you very much for all of your help. Thought I might as well show what all of this lead me to creating, not trying to hi-jack this thread :D https://polycount.com/discussion/202641/oxygen-generator-room-jonas-roscinas-star-citizen-test/p1?new=1
Well this is good news, UE4 really needs a fully functioning PBR decal system! Last year I tried making a Star Citizen style environment and I found a hacky way to get the decals working, Basically it's 3 planes layered ontop of each other, the first one uses the DBuffer decal shader and effects the normal/roughness of the…