This paper describes a high-performance special-purpose system, the Cube-3 machine, for displaying and manipulating high-resolution volumetric datasets in real-time. Cube-3 will allow scientists, engineers, and biomedical researchers to interactively visualize and investigate their static high-resolution sampled, simulated, or computed volumetric dataset. Furthermore, once acquisition devices or mechanisms are capable of acquiring a complete high-resolution dynamic dataset in real-time, Cube-3, tightly coupled with them, will be capable of delivering real-time 4D (spatial-temporal) volume visualization, a task currently not possible with present technologies.