In summary, the key factors to getting the backdrop and subject lit in a similar exposure zone is distance; The distance of the subject to the background and the distance of the light source to the subject. Decrease the distance of the subject to background and increase the distance of the main light to the subject to make this easier. The key factor for getting a soft and directional quality to the light is also distance, but it's the opposite. By getting the light closer to the subject, we can create a softer light with more directional qualities. Also remember that these qualities of the light are relative to the size of the light source. If you are using a smaller light source, you will need to get it in closer to hold those transitional values. If you are using a larger light source, you may be able to get your light further back and still hold those soft-light qualities. Also, if the examples and basic principles here make sense to you, you have kind of just learned the inverse square law!
Muslin is a cotton weave fabric that holds dyes and paints with ease. These backgrounds are made of lightweight material and are clamped to a background stand or even draped over anything to transform the look of a picture. As the muslin is made of thinner and lighter material, it does not show wrinkles and can be used as a neutral background or as a dramatic one. It comes in many different sizes and pattern that range from 5x8 to 30x30 feet and solid color backdrop or designer series patterned design. Muslin backgrounds can feature replicas of old master paintings, abstract patterns or marbleized patterns. This material is very portable and fairly inexpensive making it a favorite with photographers.
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