Definition[]
Computer-generated imagery (CGI) is the application of the field of computer graphics or, more specifically, 3D computer graphics to special effects in films, television programs, commercials, simulators and simulation generally, and printed media.
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Videogames usually use real-time computer graphics, but may also include pre-rendered "cut scenes" and intro movies that would be typical CGI applications. These are sometimes referred to as full motion video (FMV).
CGI is used for visual effects because computer-generated effects are more controllable than other more physically based processes, such as constructing miniatures for effects shots or hiring extras for crowd scenes, and because it allows the creation of images that would not be feasible using any other technology. It can also allow a single artist to produce content without the use of actors, expensive set pieces, or props.
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