Somehow I missed this news story:
A new competition focused on “Psychedelic Cryptography” has awarded cash prizes to artists who made videos encoded with hidden messages that can be most easily deciphered by a person who is tripping on psychedelic substances, such as LSD, ayahuasca, or psilocybin mushrooms. https://www.vice.com/en/article/3akkd9/psychedelic-cryptography-videos-have-hidden-messages-designed-to-be-seen-while-tripping