In college I lived with artists. A few of their artist friends come over with big sketch pads, pencils and whatever else artists use. They all drop acid while telling me they can't wait to see their amazing creations once their minds are opened. I went out for a few hours and came back to find them all sitting around the living room. One sketch pad had a long black squiggle on it, the same design you'd make if you fe…
Then I took some mushrooms with a pen and paper in hand. All I could draw was stupid smiley faces. It was just inane gibberish.
So yeah, I guess there is a bit of a myth about LSD and creativity... at least anything that involves fine motor skills and concentration. In this context it was a creativity killer.