Someone correct me if I'm wrong, but I believe the highest level of Disney Sea's Soaring show building employs a flat backdrop in a similar way. And from the non-stop articles and post I see praising the building, I'd venture to say it was convincing. Let me try and find an image.
The portion I am talking about is circled. Obviously, the tower-esque portions that just out significantly wouldn't be used, but I believe insiders confirmed that these wouldn't be flat paintings, but with details like shutters and bricks like these have.
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