Just wondering if this existed. For all I know, there's an easy way to accomplish the same thing in photoshop or whatever, but I was just curious if there were any tools that would analyze an image, look for lighting patterns, and try to guess the 3d shape of the things in the image. And then, allow you to change the light source, and attempt to recreate the image with the new light source in mind. For simple things. Obviously mirrors and semi-opaque glass and whatnot would mess everything up.