However, the film contains less computer-generated imagery than is generally supposed: Only fifteen to twenty minutes of actual animation were used, mostly scenes that use 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 intercut with the filmed characters.
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". 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 high-contrast film, then colorized with photographic and rotoscopic techniques to give them a "technological" feel.