Psychedelic movement had a strong influence on comic book artists who created an underground genre of comic book art known as “underground comix.” Robert Crumb was one of its chief proponents. Comic books influenced by the Psychedelic movement were often satirical in nature and exhibited many artistic traits of other Psychedelic works. Many Psychedelic works are famous for their visually captivating styles, but the movement also generated considerable controversy for its links to illicit substances. Posters for music festivals like Woodstock are typical examples of Psychedelic Art posters. Bands like The Who and the Jimi Hendrix Experience also featured Psychedelic Art on some of their album covers.