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Roger Penrose's solution of the illumination problem using elliptical arcs (blue) and straight line segments (green), with 3 positions of the single light source (red spot). The purple crosses are the foci of the larger arcs. Lit and unlit regions are shown in yellow and grey respectively.
Three-point lighting is a standard method used in visual media such as theatre, video, film, still photography, computer-generated imagery and 3D computer graphics. [1] By using three separate positions, the photographer can illuminate the shot's subject (such as a person) however desired, while also controlling (or eliminating) the shading and ...
Light poverty is the state or condition in which people or communities lack artificial or electric light after sunset. This originates from many social and economic reasons, including inability to afford efficient lighting. [1] Light poverty may also occur when a country's national grid has not electrified rural areas requiring light. [2]
The Phong reflection model was developed by Bui Tuong Phong at the University of Utah, who published it in his 1975 Ph.D. dissertation. [1] [2] It was published in conjunction with a method for interpolating the calculation for each individual pixel that is rasterized from a polygonal surface model; the interpolation technique is known as Phong shading, even when it is used with a reflection ...
I'd suggest that Three-point lighting is a more commonly used term than 4-point lighting setup, and that 4-point lighting is a subset of it. Consequently, I recommend merging 4-point lighting setup into Three-point lighting. --Jeremy Butler 13:39, 17 February 2006 (UTC) I totally agree with Jeremy Butler. Oliver Bronson Done.
A 3-way lamp, also known as a tri-light, is a lamp that uses a 3-way light bulb to produce three levels of light in a low-medium-high configuration. A 3-way lamp requires a 3-way bulb and socket, and a 3-way switch. In 3-way incandescent light bulbs, each of the filaments operates at full voltage. Lamp bulbs with dual carbon filaments were ...
3-point_lighting.ogv (Ogg multiplexed audio/video file, Theora/Vorbis, length 36 s, 640 × 480 pixels, 219 kbps overall, file size: 958 KB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
The following other wikis use this file: Usage on ca.wikipedia.org Il·luminació fotogràfica; Usage on cs.wikipedia.org Protisvětlo; Světlo ve fotografii