CGI (computer-generated imagery) uses computer graphics to create or contribute to images in various forms of media like films, television, and video games. It allows the manipulation of visual elements in an easier way than practical effects. CGI artists use 3D modeling software to sculpt virtual objects, set up animation rigs, and render photorealistic images. Early uses of CGI date back to the 1970s, but it was the 1990s films Terminator 2 and Jurassic Park that pioneered seamless integration into live-action scenes. Modern CGI is widely used in visual effects and virtual production through camera tracking, crowd simulation, and virtual sets.