In computer graphics circles, volume rendering has long had a reputation as an "if only/then" technology. If only desktop computers had the speed, power, and memory necessary for allowing realtime interaction with the characteristically huge volume datasets, then the prospect of being able to see beneath the surface of a CG object would have a greater appeal to mainstream computer graphics users. If only mainstream computer graphics users would see the potential value of volume rendering for their applications and demand tools to capitalize on this potential, then software and hardware vendors would eagerly strive to meet the users' needs.
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