My curiosity was sparked by a recent gallery and account deletion due to a member copyright infringement. Lets say you take a picture of someone viewing a painting (or photograph) that's hanging on the wall. Lets say you want to sell prints of your photograph, do you have to get permission from the owner of the photograph hanging on the wall? What if you take a picture of your living room, and it has some paintings hanging on the wall? I was just wondering since I don't know much about that stuff.