When i saw this, my first thought was, “This is the same quality i’ve seen on the VRay forum.” But then no surprise.
mh
Thought the same when I saw it first 
isn’t he an architectural photographer?
Hence the thread title I think. Yes it’s a photo and I was fooled until I read a little further. I presume the OP came to the same conclusion? Perhaps not…
photo…not cg. (But could pass for some vray posts)
mh