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Adaptive Volumetric Shadow Maps
Author(s) -
Salvi Marco,
Vidimče Kiril,
Lauritzen Andrew,
Lefohn Aaron
Publication year - 2010
Publication title -
computer graphics forum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 120
eISSN - 1467-8659
pISSN - 0167-7055
DOI - 10.1111/j.1467-8659.2010.01724.x
Subject(s) - computer science , rendering (computer graphics) , memory footprint , computer graphics (images) , shadow mapping , volume rendering , computer vision , adaptive sampling , ground truth , attenuation , real time rendering , global illumination , ray tracing (physics) , artificial intelligence , mathematics , statistics , physics , optics , quantum mechanics , monte carlo method , operating system
We introduce adaptive volumetric shadow maps (AVSM), a real‐time shadow algorithm that supports high‐quality shadowing from dynamic volumetric media such as hair and smoke. The key contribution of AVSM is the introduction of a streaming simplification algorithm that generates an accurate volumetric light attenuation function using a small fixed memory footprint. This compression strategy leads to high performance because the visibility data can remain in on‐chip memory during simplification and can be efficiently sampled during rendering. We demonstrate that AVSM compression closely approximates the ground‐truth correct solution and performs competitively to existing real‐time rendering techniques while providing higher quality volumetric shadows.