The Late David Warner starred in a Quietly in SFX Ground breaker
Yeah The Tron VFX Quietly helped Innovate VFX like ILM did on Star Wars , David Warner should be proud Lucas and Lisberger help ushered the innovation of CGI Effects
https://archive.ph/20120915031747/http://www.popularmechanics.com/technology/digital/visual-effects/are-tron-legacys-3d-fx-ahead-of-their-time