  A general concept of 3D volumetric visualization systems is described based
on 3D discrete voxel scenes (worlds) representation. Definitions of 3D discrete
voxel scene (world) basic elements and main steps of the image synthesis
algorithm are formulated. An algorithm for solving the problem of the voxelized
world 3D image synthesis, intended for the systems of volumetric spatial
visualization, is proposed. A computer-based architecture for 3D volumetric
visualization of 3D discrete voxel world is presented. On the basis of the
proposed overall concept of discrete voxel representation, the proposed
architecture successfully adapts the ray tracing technique for the synthesis of
3D volumetric images. Since it is algorithmically simple and effectively
supports parallelism, it can efficiently be implemented.
  Key words:Volumetric spatial visualization, 3D volumetric imagesynthesis,
discrete voxel world, ray tracing.
