Great question! Also I very much appreciate your openness to state that you consume shrooms. I love magic mushrooms and really believe our modern American culture could undergo a lot of healing through the respectful ingestion of the fungus.

As with most indigenous groups of the world, the Mayans had their own local variety of mushrooms they'd consume to travel elsewhere (intentionally leaving this wording vague).

something like chemically-induced geometric associations that drove that style of art

I'm no scientist, but from my robust personal experience with psychedelics, there do seem to be parallel experiences based on the substance consumed. For example with DMT, all of my experiences, and those I've facilitated for others, do involve the "elf" entities so many people describe as part of their experience. It would not surprise me in the slightest that your consumption of mushrooms would bring about the specific color and geometric combinations that would allude to the Mayan drawing styles (and probably also Aztec which is similar yet significantly different).

Have you ever checked out the Mayan Codices? There are only four remaining today, but there were once thousands. insert cheeky comment about how the colonizers destroyed these documents in bonfires.

This page gives the slightest bit of context of the four that remain. The page states they were drawn on pages made from fig trees. I have also seen that the leaves of the maguey plant were peeled into thin sheets, dried and turned in to paper. The dude in this video is quite a character, but you can see how he is able to create the paper from the maguey.

Here's a link to where you can see the pages of the Dresden Codex. Your local university library may have a copy of the codices. There's a special collection here at the University of Missouri-Kansas City's library where I was able to view reproductions of the codices in their entirety.

Hopefully this answers your question! I'll send you a message about the print