Sky Perspective

At first glance this image looks like a rather boring aerial photo of western Kansas. But the sky is queer, with rectangular clouds. Actually, the sky is a chunk of land from Google Earth, desaturated, cooled and flipped. It illustrates the similarity between land and sky in that each follows the rules of perspective, diminishing and flattening as field or cloud approach the horizon. A one point perspective grid using a diagonal vanishing point can be the basis for any simple landscape view. Not only clouds, but roads, rivers and ocean waves can be worked out over such a grid. Actual scale is unnecessary in such a grid; just mark off a horizontal line, connect each mark to a central vanishing point, and a diagonal will mark the receding horizontals at the intersection points. Of course the grid is simply a general framework to keep the image believable. Clouds vary in size and shape. They may be lined up in some orderly manner, or ...