Awesome! I had been working on a similar project couldn't figure out the snow on the trees for the life of me! It's great to see how you approached it. The work look great! Thanks for sharing your process.
I believe author would be surprised that it's not american, but soviet bunker :)
IndieCade 2012: Hippies, Hackers, & War Games (Mary Flanagan, Tiltfactor Lab)
Mary Flanagan of Tiltfactor Lab talks about the history of computer science and discusses seven people who have greatly contributed to the development of computer technology. These figures are Joseph-Marie Jacquard, Augusta Ada Lovelace, Alan Turing, Christopher Strachey, Steve Russell, Bernie DeKoven and Gary Gygax.