I recently upgraded to Photoshop CS5, and as part of the upgrade Adobe has some interesting add-ons available on their web site. The effect above is part of the Pixel Bender plug-in that you can download here (but it only works with CS5). Pretty interesting effects, kind of reminds me of the Fractalius plug-in that I sometimes use. The Pixel Bender plug-in doesn't have the cleanest user interface. You can tell this technology is in its infancy with Adobe. You'll probably see more of it in future versions of Photoshop. Until then, it's fun to play with. I like what it did to the stones in the wall and the gargoyle here. The image above is several years old -- HDR of the Bishop's Palace in Galveston. I masked the pixel bending off of the sky --- that looked just too weird ... even for me.