disclosed are an image editing user interface system and method . the system includes one or more computers with one or more graphical user interfaces , and a receiving process for receiving one or more rendered two dimensional images on the computer graphical user interface . each two dimensional image represents reflected light from a lit three dimensional object model , and the reflective light at each point of the two dimensional image corresponds to an object point on the three dimensional object model . the system further includes a changing process for changing a portion of the two dimensional image by changing the light intensity at a set of one or more points on the two dimensional image . the change in light intensity at the set of points causes a change in the three dimensional model to correspond to the change in the light intensity .