Movies - Low-key lighting

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	Movies - Low-key lighting

Low-key lighting is a style of lighting for film or television. It attempts to create a chiaroscuro effect. In traditional lighting design for black and white photography, also called three-point lighting, there are a key light, a fill light, and a back light.

The key light shows the contours of an object by throwing areas into light or shadow while the fill light provides partial illumination in the shadow areas to prevent a distracting contrast between bright and dark. For dramatic effects, one may wish the contrast to be high — to emphasize the brightness of the sun in a desert scene, to make a face look rugged, seamed, and old, or to isolate details in a mass of surrounding shadow. A variety of methods can be used to create these effects.

The key to fill ratio, as measured using an instrument to measure light intensity, e.g., a light meter, is the ratio of the intensity of the key light to the fill light. Low key lighting actually has a much higher ratio, e.g. 8:1, than does high key lighing, which can approach 1:1. It is perfectly possible to use fill light in these large areas of shadow, reducing the contrast. Generally the term 'low key' refers to cases in which no such care is taken.

Low key is also used in cinematography to refer to any scene with a high contrast ratio, especially if there is more dark area than light. Compare with high-key lighting.

Ambient lighting is a term used to describe the use of light to illuminate an object or background in a deliberate manner to evoke a certain mood or emotion. This highly skilled lighting technique is very subtle but nevertheless can achieve highly effective outcomes. An example of this is an evil character deliberately illuminated from beneath the chin giving them a certain eerie and demonic appearance.

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