Matte Painting for Envato psdtuts+ Commissioned for the tut and other purposes. Tutorial available over 400 screens and instruction plus several gigabytes of video for all the details. Sorry Premium only. http://psd.tutsplus.com/tutorials/painting/snow-covered-matte-painting/
Still here it is done completely on photoshop over an artmatic baseplate wich is almost all gone.
Hope you guys like it.