Always Ask before you do something like this. It was lunchtime and a glass truck was parked outside a local eatery. The workers were eating their lunch and the lines of the rack on the truck attracted my attention. (Lines and curves go well together.) I asked the workers if the model could stand on the back of their truck for a few pictures. They were more than happy to oblige. After shooting a few frames I asked if any of them wanted to be in a shot with the model. They all declined. One commented, "If my wife saw a picture like that she's question what I do at work." From a render standpoint, look for lines to draw attention to curved objects in your art. (i.e. women, cars, etc.) The straight lines make curves more obvious.