I've tried a few substances but none that were too far out.

My roommates peer pressured me into taking way too much weed one night after dabbling in it lightly a handful of times before. I then quickly found myself lying in bed. Somehow, abstract art made sense to me there in the ensuing moment of contemplation. I was seeing it form in my head, splotches, lines and colours and space, it all clicked together. I felt changed the next day. Of course it wore off after, but that experience gave me a new appreciation for the depth of art that seems simple and meaningless on the surface. Like I had an idea of where it came from.