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The article omits 1984’s The Last Starfighter, which I believe was the first film to use CGI to render “ real life” objects.

Tron was noteworthy for the sheer amount of CGI mostly.

I know this may sound weird but only the first 15 minutes of the movie and a few other small scenes were CGI. Most of the movie used old school film effects and hand-drawn cell animation. But the CGI in Tron was mind blowingly advanced for the era including the first CGI facial animation.

Also noteworthy for being the first film to market itself as a "CGI film"

Aslo noteworthy that Tron was not nominated for special effects because they 'cheated' by using computers.

I always had heard that first 3dDone was Tron but that the first one to arrive to theaters was Star Trek, the wrath of Khan, I was told that the explosion of the Genesis was the first one full computer generated scene in films.