Oops I was misremembering. I was thinking about the deferred decals technique from Star Citizen. Explained here https://polycount.com/discussion/comment/2357033/#Comment_2357033
I baked from High to Low in substance, not sure what you umean by UV breaks on the low wherever there are hard edges? If you mean splitting the UV's on the model example above into 3 seperate UV islands then yes I did that :) This is from Sunset Overdrive, the PDF and Video Talk explains that they are just using the…