I'm posting this in the photoshop forum because I don't know where else to post this question, and it's sort of a photoshop question. I want to take an image, and from that image create a height map. This image is a height map - areas that are whiter are higher. While I'm aware that one loses information in getting a 2D image of a 3D object, I'm looking for a way to convert a conventional image (say a piece of 2D art) into a height map. Anybody have any cool filter-ish tricks to help do this?