Wow!! Incredible work everyone! And some great lighting as well.
Your paper buildings have surely come a long way from my mother's "putz houses" we had on our S gauge Christmas layout when I was a kid :-)
(For examples: http://www.cardboardputzhouses.com/)
I use "paper structures" too but they consist of interchangeable photos of buildings, tipples, and etc. that I insert in plastic stands from Staples. It's a carpet layout, so I can easily make location and structure changes this way.
Tomlinson Run Railroad