Where is the best place to look for buildings or pictures of buildings to use in a backdrop. I have been pondering the backdrop issue for sometime on what type of paint to use for the sky and what to use for the clouds. As i am not very good at painting i would like to find out some painting ideals from some other's on what type of paint to use and what is the best to paint this on. I have about 6 or 7 sheets of elmer's foam board that i can use and i was wondering if that would be good.Any ideals would help and i would apprecate your comments.