Simulation of rupture fault displacement during a tsunamigenic earthquake event is vital to understanding the subsequent wave propagation. We have developed a new approach which involves the enhanced delineation of surfaces derived from simulations by using interference patterns. In our approach, light path differences, which are defined by the surface values to be visualized, modulate the lighting intensity to generate the interference patterns. Our method is very effective at illustrating subtle but critical surface changes of surface features in deformation processes.