Stumbling on the photograph below inspired me to explore projections on outdoor urban surfaces such as cement. The massive pillars give shape and personality to the projected paintings, changing their meaning.
“An extraordinary exhibition held in former bauxite mines in Provence. The hollow caves and pillars are used to project images, constantly changing and overlapping each other.” Photo and description by dorsetlass @ flickr.
mumbai+bombay 
You can see things in a way an ordinary person cannot.
@ Nita: Thank you! Lets see if this idea works though, will post more as I try to figure it out :P