[progmetaldev]

It's probably not who you were talking about, but this account on YouTube does a good job of representing the visual experience, while also talking about other effects. The videos looking at nature, and the way the visuals start to form geometric patterns, and that "breathing" effect are powerful. The author covers various substances, and how the effects can be minor (slight "breathing" or pulsing of surfaces), to full geometric "worlds" (such as from DMT - although I've never dipped into that substance).

https://www.youtube.com/@josikinz

[coffeecantcode]

That is not who I had in mind but after looking through their account I’m going to binge their videos, very cool stuff. I always found that studying the minute differences in these substances is such a genuinely interesting topic. It’s covered a lot in Mike Jay’s Psychonauts.