It's essentially a little style I came up with that put simply involves taking an image - which usually tends to be anything, I believe this one was a small image of those alien things from Toy Story. Filling the canvas with it in a certain way, using Wave, couple of filters and then duplicating and flipping the image several times (set on either lighten or darken) and applying a texture.
After that it's just a case of finishing it up a little bit, working on the colours etc... This one had a bit more work than usual and took a fair amount longer. But you can get the jist.