A method of processing an image, includes the steps of orienting at least one virtual plane among a plurality of objects representing three-dimensional objects; projecting a shadow of a first one of the objects onto the virtual plane based on a viewpoint representing a light source; and mapping the projected...http://www.google.com/patents/US6677946?utm_source=gb-gplus-sharePatent US6677946 - Method of, an apparatus for, and a recording medium comprising a program for, processing an image
