Psychedelic Fantasia

In 1927, German physician Kurt Beringer published a description of his mescaline studies in research

subjects. One of his subjects said that the remarkable visual images he experienced should be captured in film. Years later, this same subject was hired by Walt Disney as chief visualist for Fantasia.

This was reported by Peter Stafford in his 1992 books Psychedelics Encylopedia. Years later, he could not recall his source for the claim but confidently claimed the report was accurate. It certainly seems plausible, at least.

via http://www.maps.org/dissertation/chapter1.pdf