Grayscale to 3D Mesh PS CS4

Not the best demonstration, but you get the idea. Apparently PS CS4 will generate a 3D mesh from a gray scale image. In combination with camera mapping this could be a powerful 2d approach to composing a shot. Rough out the geometry in gray scale then add paint to give it light and color.

http://av.adobe.com/russellbrown/MeshFromGrayCanyon_SM.mov