Hello, I am relatively new to studio work. I love the look of a pure white background and have been researching how to do it for a few weeks in my spare time. Anyway, I got a light stand and a white muslin background. I also got 1 Alien Bees B800 strobe and a medium size Paul C. Buff softbox. I set the muslin up today in a roughly 20 x 20 room with a few windows. The muslin is wrinkled up pretty bad, but I had read that that is not a problem with enough light thrown at it. If it makes a difference, the muslin is 10x20. Anyway, I attached the softbox to the B800 and cranked it up to full power. I had it of to one side of the backdrop feathered as evenly as possible over the entire backdrop. The light reading was at like f20 in the middle and f18 towards far side. I shoot a D90, so the lowest ISO I can really go is 200. So that is 1/250 at f20. What was weird was that in order to get a completely blown out background, I had to shoot it at f8. So...then I placed a large item I am selling on ebay in front of the background. That metered at like f2.8 with ambient light, so that's where I shot it. The result was AWFUL. The top of the item was blown out. The front of the item was underexposed to the point that you could see all the wrinkles in the muslin under it, etc... So, I figured I would try something else. I put my old D70 on a tripod and placed it about 10 feet in front of the backdrop. I took some shots of it. It was so..."milky" is what comes to mind...but better than the previous shots. When I played with the aperture value, I was either too dark or too light. Nothing seemed to work. The worst part of it all is this really annoying "ghosting" I think it's called...in my lens. I figured it was coming from the light box, but I moved further back and shot, and it actually got worse. What am I doing wrong? I have my first shoot with a model this Friday coming up, so I really need to get this down by then. If the ghosting is in fact from the light, how do I get it to stay on the backdrop. Everyone seems to be using a different kind of reflector and/or homemade contraption for background modification. I figured worst case scenario for Friday is I don't light the background and just use it as a gray background, but with it as wrinkly as it is, I don't think that's possible either. Lastly, how far does my subject have to be from the backdrop? The backdrop is 20 feet long. If I have it 10 feet high, that only gives me 10 feet total to work with. With lights and all, that leaves pretty much nothing. How big of a background do you guys get for infinity shots? If I want to use it as an infinity, I don't know how it is possible as I am getting so much spill. Please tell me what I need to get/do!!! I am looking for an infinity background, PURE PURE white with a lot of contrast and clarity in the subject. If you tell me that I need more lights, just go ahead and say so. I have 1 more B800 on order. Will 2 B800's light a 10x20 backdrop? What is the best pre-made modifier for this? I don't really want to build anything. For cost reasons, I was hoping I could get away with 2 lights and a reflector, but I don't think that's happening now that I'm reading more and more about white backgrounds.