filename     : Gue07b.pdf
entry        : article
conference   : Eurographics 2007, Prague, Czech Republic, 03-07 September 2007
pages        : 525-533
year         : 2007
month        : September
title        : High-Quality Adaptive Soft Shadow Mapping
subtitle     :
author       : Gael Guennebaud, Loic Barthe, Mathias Paulin.
booktitle    : Computer Graphics Forum (Proceedings of Eurographics 2007)
ISSN/ISBN    :
editor       : 
publisher    : 
publ.place   :
volume       : 26
issue        : 3
language     : english
keywords     : Soft shadows, Realtime rendering, Shadow mapping.
abstract     : The recent soft shadow mapping technique allows the rendering in real-time of convincing soft shadows on complex and dynamic scenes using a single shadow map. While attractive, this method suffers from shadow overestimation and becomes both expensive and approximate when dealing with large penumbrae. This paper proposes new solutions removing these limitations and hence providing an efficient and practical technique for soft shadow generation. First, we propose a new visibility computation procedure based on the detection of occluder contours, that is more accurate and faster while reducing aliasing. Secondly, we present a shadow map multi-resolution strategy keeping the computation complexity almost independent on the light size while maintaining high-quality rendering. Finally, we propose a view-dependent adaptive strategy, that automatically reduces the screen resolution in the region of large penumbrae, thus allowing us to keep very high frame rates in any situation.