@Bob posted:"Is this entire structure set out some distance from the backdrop, or is this something you added in Photoshop?"
Will, all of the city structures sit away from the backdrop. In fact, an elevated track runs behind them.
Love the way you used the space Bob. I very clever layout plan and treatment of the city. I often find just putting flats against the wall to be unconvincing. I assume things are somewhat removable so you can get to the hidden track if necessary?