Koh uses two-dimensional photography to create holographic, three-dimensional constructions. His photo sculpture has a transparent surface that reflects the images of the world, and yet reveals the emptiness of its interior space. The overlapping planes create an illusion of indefinable depth and varying imagery, depending on the viewing angle. Stone Body-39 is a photo sculpture upon which photographic images of a body part of a sculpture in the Louvre Museum are overlaid upon. It creates an empty box covered with ghostly sculptural images.