I want to do some photography of a person subject, and I had a couple questions First, what kind of background should I use? I want a white background, but I have no clue what to use for it? Second, I have a white roll down blind could that work? But it only goes down to about the feet. Should it go down longer, or what? I want the feet to show, but like I said, the blind only goes down to the ankles.