I've had a ton of psychedelic based dreams, sometimes these dreams were influenced directly from a drug, like salvia or amanita muscaria taken a few hours earlier.
A dream on Amanita Muscaria I had a few years ago involved me going to a Hospital, up to the second or third floor, where I was to have a surgery. I then see a man with his pregnant wife and I follow the doctor and man out through another door and we walk along some catwalks for a bit and then start to go up an escalator. This is where it gets trippy.
As I go up the escalator, everything I see starts to slow into a massive trail, I'm going up, but time is slowing, space is 'dilating', and as I stand along a conveyer belt on the floor, the walls begin to 'stretch' out and I see a massive ball of bright, morphing colors, I try to run to the ball, but everything spreads out....
Another dream influenced directly by Salvia. I'm up in deep space, on one of those enterprises from Star Trek. Then the ship begins to 'warp' out and the whole ship and my spatial interpretations warp out to trails of triangle fractals, warping and spinning. We then stop down and beam to a planet of cactus people. They take us into a building with several empty rooms, the cactus people come out, they have colorful flowers growing out of their heads. They then offer to do the 'dance of colors' and we tell them to go on. As they start to dance, my vision fills up with bright golden triangle fractal patterns, spinning all around and everywhere. I think I saw pyramids too.
Just the other morning I suddenly heard Jimi singing Purple Haze and I instantly saw him jamming with colors everywhere.