Fast, Memory-Efficient Construction of Voxelized Shadows

Viktor Kampe, Erik Sintorn, Ulf Assarsson
Chalmers University of Technology
Chalmers University of Technology, 2015


   title={Fast, Memory-Efficient Construction of Voxelized Shadows},

   author={K{"a}mpe, Viktor and Sintorn, Erik and Assarsson, Ulf},



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We present a fast and memory efficient algorithm for generating Compact Precomputed Voxelized Shadows. By performing much of the common sub-tree merging before identical nodes are ever created, we improve construction times by several orders of magnitude for large data structures, and require much less working memory. We also propose a new set of rules for resolving undefined regions, which significantly reduces the final memory footprint of the already heavily compressed data structure. Additionally, we examine the feasibility of using CPVS for many local lights and present two improvements to the original algorithm that allow us to handle hundreds of lights with high-quality, filtered shadows at real-time frame rates.
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