A few nice wall art images I found:
Wall art in Kensington
Image by John G Meadows
FP100C, negative bleached/reclaimed then scanned
Energia Goes Berlin – Visiting the Art Department
Image by ironskyfilm
The anatomy of a Nazi ufo.
Learn more of the concept art here: www.ironsky.net/site/propaganda/pictures/
Wall art Highgate style
Image by pic fix