For this concept art, I first made a 3D base in maya over the level design, then I painted over it. You can find this environment in the game behind Sarif Industry Building in Detroit. More on Fewlines.com!
You did an amazing job with the Deus Ex: HR concepts, thanks for posting your work here. I love how the game looks almost exactly like all the concept art I've seen of it.
Do you have any concept art regarding the Montreal hub? It sounds interesting from what I've heard. Do you have to keep it under wraps in case they complete for DLC or another possible game?