Early animation techniques included the zoetrope in 1834 and flip books in the 1800s. In 1906, J. Stuart Blackton created one of the first animated shorts using drawn animation. In 1914, Earl Hurd invented cel animation which involved painting on transparent sheets placed over backgrounds. Walt Disney began animating shorts in the 1920s including Mickey Mouse in 1928. Computer-generated animation emerged in 1982 with Tron and became photorealistic with Jurassic Park in 1993. The first fully CGI animated film was Toy Story in 1995 and motion capture was first used for a fully animated film in The Polar Express in 2004.