People throughout time and culture have described the experience of seeing auras, and I believe that's a result of peeling back inhibitory responses to really "see" what the eye and mind see without too much heavy filtering.
Like today there are people who experience things like psychedelic flashbacks or HPPD, many report being able to trigger those experiences willingly, and sometimes uncontrollably.
I think you can train yourself to see this way, and meditation is a great way of peeling back your brains' pattern matching and assumption making to do it. It's similar to learning to "see" as an artist, or the artist's eye. When you first start out, you have to learn to look past the generalizations your mind fills in for what you think you're looking at to actually "see" what needs to be seen to capture what you want in art. It's a different type of perception.
For that reason, I don't think drugs need to be involved at all to make art like this, just a different way of perceiving things.