These are actual cloud photos with stereograms developed from them. None of the photos have been doctored except for contrast and exposure. If you were to subject the photos to a stereogram creator you should achieve the same results. I have found that clouds that indeed have hidden images, have two kinds. The first is where the image resembles the image the cloud forms. The second is a completely different image. Both images that look like the cloud and images that look like something else, are rare. Many of the images reveal objects that might be alien spacecraft or creatures. It is not too farfetched that a being who was smart enough to transport itself here from another galaxy, would release using clouds for cover would avoid unwanted attention.