I just read this excellent article about the causes of musical frission, what makes a particular moment in a piece of music strike you as just right. It would be nice to see these ideas built into an automatic composition program like Melody Generator. In the book I mentioned how a sunset can induce strong feelings through an unguided process. I don't see any reason we couldn't make a system that generates beautiful music like the atmosphere generates beautiful sunsets.
I think it gets the cloud shapes about right, though the lighting needs a lot of work.
Music Perception: An Interdisciplinary Journal
Vol. 24, No. 5 (June 2007), pp. 473-484
Vol. 24, No. 5 (June 2007), pp. 473-484