The effective use of this type of graphics was established during the 1989 liability trial resulting from the crash of a Delta airliner at Dallas/Ft. Worth Airport. In contrast to earlier graphics, photorealistic computer graphics can illustrate natural light sources, the effects of light on the surfaces of objects, shadows and reflections of other objects, artificial or natural environments, and the effects of other natural phenomenon. While the costs of photorealistic depictions can vary greatly, the benefits to a lawyer far outweigh the costs in terms of making his case more credible. The evidentiary foundation for these graphics must establish the accuracy of the original data source, all calculations and assumptions, the method of inputting data, the operation and capability of the computer, the output process, the medium by which the graphics are reproduced, and the final presentation itself. 5 notes