Lapidous, EugeneJiao, GuofangZhang, JianboWilson, TimothyKurt Akeley and Ulrich Neumann2013-10-282013-10-282001158113407X1727-3471https://doi.org/10.2312/EGGH/EGGH01/081-086In this paper we present new class of variable-resolution depth buffers, providing a flexible trade-off between depth precision in the distant areas of the view volume and performance. These depth buffers can be implemented using linear or quasi-linear mapping function of the distance to the camera to the depth in the screens pace. In particular, the complementary Z buffer algorithm combines simplicity of implementation with significant bandwidth savings. A variable-resolution depth buffer saves bandwidth by changing size of the per-pixel depth access from 24 bits to 16 bits when distance to the pixel from the camera becomes larger than a given threshold, This distance is selected in order to keep the resulting resolution equal or larger than the resolution of the 24-bit screen Z buffer. For dynamic ratios of the distances between far and near planes 500 and above, bandwidth savings may exceed 20%. Quasi-linear depth floating-point depth buffers are best at high dynamic ratios; 3D hardware should support per-frame setting of the optimal depth buffer type and format. Per-frame adjustment of the resolution switch distance allows balancing performance with depth precision and should be exposed in the graphics A PI.I.3.1 [Computer Graphics)Hardware Architectureraster display devicesI.3.3 [Computer Graphics] Picture/Image Generationdisplay algorithmsI.3.7 [Computer Graphics]Three Dimensional Graphics and Realismvisible surface algorithms.