well i wasn't going to do the caption part but for some reason i have to
the bg idea is from a scan in minitokyo but it's totally mine it took me 2 hours and the render is from here
THE Background
first i made a rect selection and use the gardient fill to make the difference in the ground than used the grains effect to make it look bit real
than i ust the ground lines i can't remember the blending modes sorry than i used the same blending mode for the rock
for the wall i used the same thing as the ground
and i finished it with make the shades and every thing that the short story
there was about 12 layer i hope you like it