Hi Gary, It's quite interesting to me. I know the Spirit views are true stereo. But now I wonder about the Mars Express view whether I was simplyh stunned by the alien beauty of the world and thought it looked like it popped out in 3D, or if it was true 3D -- my brain was programmed to see it in depth. Then when I studied the images I couldn't tell if the images really were different. Hummm. Anyway, it's a wonderful and strange view. I have no trouble letting my eyes relax so that I can make two images slide together, just looking at two stereo views side by side. But there's a limit to how far they can go, so I might do the whole image at a small scale or half at a time at a larger scale. Best wishes, Joe