I propose an experiment which demonstrates computation on the (DMT-altered) human visual system. It is a simple visual stimulus/web application which when viewed while on DMT should solve a graph cut problem, using colour as input and hallucinated depth perception as output (see blog post for full explanation):

https://smoothbrains.net/experiments/tilespace/index.html?ra...

I hope. I haven't tested it yet. Prior art includes Scott Aaronson's experiment in using soap bubbles for computation[1], and Mark Chiangizi's efforts to build logic gates from Necker cubes[2]:

[1] https://www.scottaaronson.com/papers/npcomplete.pdf

[2] https://gwern.net/doc/cs/algorithm/2008-changizi.pdf