When I am not working on my software start-up I like to paint and create large wood-fired ceramic scultptures. I am a self-taught artist. This is an example of one of my pieces. Its a large (8 foot by 4 foot) acrylic painting on plywood.
I find there are a lot of the same creative processes used when creating software or art.
Below is another large piece. Its 8 feet by 3 feet acrylic/pastel painting on artist canvas. Many times I have a general idea of what I want to create and then just go at it. In this piece I tried to sketch a large vessel I was working on. It totally changed into something else during it's creation.
Here is one of the best articles on art and software by Paul Graham.