Discusses a dot-graphics plotting technique that allows a control system to read voxel data at a constant rate, despite the random-scan nature of the writing method. If we assume the data is arranged in consecutive slices, then the constrained 3D optimization problem reduces to a 2D one. In this article, we investigate and seek to optimize the efficiency with which the voxels within each slice are plotted, in order to reduce the memory requirements. Moreover, we consider the effect of changing the plotting order of the voxels within each slice to shorten the total beam path and thus the total time required to plot the voxels. This increases the total number of visible voxels displayed in the volume.
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