My teacher was talking about a college professor she had that had a picture drawn out that was drawn using music. It was a playable piece but looked complicated. I'd like to see an example and can't find any online
I'm not sure this is what you mean, but there is the piece „Ode an das Ruhrgebiet“ by Marc Vogler which is a playable piece, but the score sheet depicts the headframe of a coal mine in Essen, Germany. You can see an image on the composer's page. (Larger version).