![]() ![]() In order to provide much needed separation between subject and background, the background light will have a color filter, blue for example, which will make the foreground pop up. In video and television, the background light is usually of similar intensity to the key light because video cameras are less capable of handling high-contrast ratios. A light diffuser comprises a film bearing a macro diffusion efficiency variation in which the efficiency variation is greater than 5 between two locations. More than one light could be used to light uniformly a background or alternatively to highlight points of interest. In film, the background light is usually of lower intensity. By adding a background light to a set, filmmakers can add a sense of depth to shots. In a four-point lighting, the background light is placed last and is usually placed directly behind the subject and pointed at the background. Four-point lighting is the same as three-point lighting with the addition of a background light. Many lighting setups follow a three-point lighting or four-point lighting setup. This is like a pingpong ball on a very small. The background light will also provide separation between the subject and the background. The diffuser has become the light source rather than the small flash head that sits behind it shooting through. ![]() source passing through it so that the result is soft or diffused light.
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