A scrim is a lighting accessory used in photography and film that is placed in front of a light source to reduce its intensity, usually by about one stop, without affecting the quality or colour of the light. Scrims can be made of fabric, mesh, or other diffusing materials, allowing photographers to soften harsh shadows and achieve more balanced illumination.
Scrims are commonly used in portrait, studio, and product photography to control exposure, create flattering light on subjects, and maintain a natural look. By modifying light without altering colour temperature, scrims help photographers achieve precise, professional results in a variety of lighting setups.