generative art examples

The first two images are from a really great article I found with examples of generative art:
http://mediamilitia.com/getting-started-with-generative-art/
The first image is my favorite of all of them.. I love the complexity of it and the many layers that went into making all the different shapes and textures.  I like how they all can stand alone as images without an image behind it.

These second two images are  done by a guy name Marius Watz.. I really like the the use of colors in both the images and the organic feel the top one has.  Both very much in a style I'd like to explore.

First image is from this link: http://somerandomdude.com/stream/tumblr/past-processing-work-by-marius-watz-ported-to-javascript-through/

Second image is from this next site and also has a good article about the guy and his work: http://www.pixelache.ac/2005/archives/casey-reas-marius-watz-lectures-in-helsinki/

This one feels very different to me than the first two, but I like this idea of the arrows being incorporated.  Found the image at this site: http://4volt.com/Blog/archive/2009/07/29/new-generative-art-ndash-missile-cloud.aspx