
John Knoll on CGI, Tron And 25 Years of Change 194
StonyandCher writes to tell us John Knoll, visual effects supervisor at Industrial Light and Magic, is using the 25th anniversary of Tron as a platform to look back at the last 25 years of visual effects. "The type of imagery that was possible to create at the time was very clearly computer generated; it wasn't going to fool anybody into thinking it was live action. That was a limitation of the technology that worked very well within the story, that fit right in and made a lot of sense: if you're telling a story about events taking place inside a computer, inside a big virtual environment, what techniques should you use? Parts of the film were done by shooting live action then doing rotoscope and other optical techniques over the top of it, but the stuff that really looked cool and stood out was the stuff that was computer generated."