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 :)
Riccardo Minervino has recently shared a new video tutorial series that will show you the way you can create a female superhero figure in Maya, Zbrush, Marvelous Designer and some other tools, and prepare it for 3D printing. Take some time — you will need 5 hours to study the full process.
Here are some final pictures:
The final figure, ready to be printed, can be bought on Gumroad for $5+.