CGI (computer-generated imagery; computer-generated images)

CGI is a term referring to the use of 3D computer graphics and technology (digital computers and specialized software) in filmmaking to create filmed images, special effects, and the illusion of motion; often used for large crowd scenes to cut down on the cost of hiring extras, or for giant creatures, huge buildings, and other costly items. See "Visual/Special Effects.” CGI is short for computer-generated imagery and computer-generated images.