In 1941, the animated movie Dumbo featured a famous psychedelic scene which broke new ground culturally. By the 1960s, the use of LSD and magic mushrooms became popularised among certain sub-cultures, notably the hippy movement. When rock bands like the Beatles began referring to psychedelic experiences in their lyrical content – often using imaginative allusions to Lewis Carroll and Aldous Huxley – so their visual imagery began to change, too. Psychedelic visual culture takes many forms, but it tends to highlight bright, repetitive decorative effects, such as paisley designs, often a feature of psychedelic rock album covers in the 1960s and 70s. From the 1980s, a disembodied yellow smiley face represented the 'acid' scene for a whole new generation of psychoactive thrill-seekers.