Conversation so far:
What did Mike Judge's successful first run of Beavis and Butt-Head on MTV do for him?
After the successful first run of Beavis and Butt-Head on MTV, Mike Judge co-created the show King of the Hill with former The Simpsons writer Greg Daniels.
What did Mike Judge co-creating the show King of The Hill do?
King of the Hill became a large success for Fox: named one of the best television series of the year by various publications, including Entertainment Weekly, Time, and TV Guide.
What did Mike Judge's King of the Hill success do to him next?
Mike Judge began to develop one of his four animated short films entitled Milton, about an office drone named Milton that Judge created.
What did Mike Judge developing an animated short entitled Milton do for him?
The film Milton released on February 19, 1999, and was well received by critics. Although not particularly successful at the box office, it sold well on VHS and DVD.
What did Mike Judge do with the animated short entitled Milton?
Originally, the studio wanted to make a film out of the Mike Judge character but Judge was not interested, opting instead to make more of an ensemble cast–based film.
What did Mike Judge opting to more of an ensemble cast-based film of Milton do for him?
Mike Judge made the relatively painless transition from animation to live-action with the help of the film's director of photography who taught him about lenses and camera placement.
What did the animated short entitled Milton do for Mike Judge?
Since fall 2003, Mike Judge and fellow animator Don Hertzfeldt have run an animation festival called The Animation Show. The Animation Show tours the country every year, screening animated shorts.

Question: What did this lead to
Self-contained rewrite: What did Mike Judge and Don Hertzfeldt running an animation festival lead to?