[10.6.2.133] In television, film and theater lighting: Material used 1) in the beam of a luminaire to modify the beam shape, intensity, and/or shadow characteristics (also available as half scrim to cut intensity of only one-half of the beam, usually with wire screen); or 2) as a stage curtain that appears opaque when illuminated from the viewing side and becomes transparent when this illumination is reduced and a higher level illumination is provided behind the scrim.
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