Tron semblait utilisé du CGI mais je sais pas si c'est juste de dire pratiquement tout fait:
Tron was one of the first movies to make extensive use of any form of computer animation, and is celebrated as a milestone in the industry; but only fifteen to twenty minutes of such animation were used,[7] mostly scenes that show digital "terrain" or patterns or include vehicles such as light-cycles, tanks and ships. Because the technology to combine computer animation and live action did not exist at the time, these sequences were interspersed with the filmed characters. The computer used had only 2MB of memory, with a disc that had no more than 330MB of storage. This put a limit on detail of background; and at a certain distance, they had a procedure of mixing in black to fade things out, a process called "depth cueing".
Most of the scenes, backgrounds, and visual effects in the film were created using more traditional techniques and a unique process known as "backlit animation".[4] In this process, live-action scenes inside the computer world were filmed in black-and-white on an entirely black set, printed on large format Kodalith high-contrast film, then colored with photographic and rotoscopic techniques to give them a "technological" appearance.