1. A video memory for storing a three dimensional image comprising: (a) a plurality of regions of memory, each said region having a plurality of data units, each said data unit uniquely representing a single voxel of said image; and (b) a bus interconnecting said regions for selectively receiving and transmitting said data units therebetween said regions; and a plurality of controllers, wherein each said controller is uniquely connected to at least one of said regions and wherein each said controller is connected to said bus wherein said regions are interconnected through said controllers.