In the creation of engine parts, for example, common concerns are stress and the center of gravity. The early demand for photorealism in CAD comes from users whose design depends more on an accurate and complete visual representation of the part. The importance in making this technology accessible comes from extending CAD tools into new areas not yet fully addressed with current systems. Architects require pictures involving marble floor, wood paneling, with sunlight streaming in. Automobile stylers require pictures involving chrome, glass, wax, metallic paint, reflections of the great outdoors.
Product designers require pictures involving a wide range of shapes, materials, texture.
There are other demands outside of traditional CAD markets. Broadcasters require animated sequences of recent and predicted weather patterns and accurate recreations of news events. Scientists require realistic graphics simulations of experimental processes. The Elements of Photorealism Achieving photorealism demands greater sophistication in both modeling and rendering. Most current modeling systems are concerned only with geometry, with the shape of the design.