The idea that a human could be entirely represented as a program in a computer was a core element of the film "Tron". This would be further explored in the film version of "The Lawnmower Man", "Transcendence", and "Ready Player One" and the idea reversed in "Virtuosity" as computer programs sought to become real persons. In "The Matrix" series, the virtual reality world became a real-world prison for humanity, managed by intelligent machines. In movies such as "eXistenZ", "The Thirteenth Floor", and "Inception", the nature of reality and virtual reality become intermixed with no clear distinguishing boundary.