In college I went through a period of having a lot of mushrooms from having grown them, and also a really good lsd connect. My friends and I were tripping 4 or 5 times a month for probably six months. I had a pretty noticeable persisting effect for a while where if I stared at a wide surface, like a floor, or countertop, or a grassy yard, the highlights and darker areas would start to combine into a floating layer of uhh, like rotating, interlocking cogs, but more floral than mechanical. It was something that I had to try to see though, like I had to consciously relax my vision, in a way, to see it. It felt like a weird ability I’d learned more than a permanent effect of tripping. I didn’t mind it and it was never disruptive in any way. It faded over around two years before I realized I couldn’t see it at all anymore. I’ve tripped a lot of times since then too and it hasn’t come back.