Ever since the dawn of the earliest CGI movies, the medium has opened up countless thrilling worlds for movie-going audiences ...

Narrator: Back before the widespread use of CGI, effects artists and filmmakers ... but it wasn't used in a movie until 1973's "Westworld." So how did filmmakers in the early 1900s do this?

It later emerged that the classic characters from the original 1937 movie were depicted in the film using CGI and motion-capture technology, with only one of those seven actors coming from within ...