This image was created using one image, four times. When I was in high school this was one of our first digital photo assignments (back on photoshop 5.0) and I've always had a softspot for it. The original image is a dutch angle view of the Field Museum's ceiling. Then in photoshop (CS4!) I copied the original three times, flipping it around as needed. Then I bumped the blue up a little bit to give it this nice "heading to the center of the death star" look.
One other thing you may notice, the focus drops off towards the center and at the edges. That's because the original image was taken with the lensbaby.
As always I appreciate anyy comments or feedback you have.