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@incollection\{Wimmer-2006,
title = "Robust Shadow Mapping with Light Space Perspective Shadow
Maps",
author = "Michael Wimmer and Daniel Scherzer",
year = "2006",
abstract = "In this paper, we present a new shadow mapping technique
that improves upon the quality of perspective and uniform
shadow maps. Our technique uses a perspective transform
specified in light space which allows treating all lights as
directional lights and does not change the direction of the
light sources. This gives all the benefits of the
perspective mapping but avoids the problems inherent in
perspective shadow mapping like singularities in
post-perspective space, missed shadow casters etc.
Furthermore, we show that both uniform and perspective
shadow maps distribute the perspective aliasing error that
occurs in shadow mapping unequally over the available depth
range. We therefore propose a transform that equalizes this
error and gives equally pleasing results for near and far
viewing distances. Our method is simple to implement,
requires no scene analysis and is therefore as fast as
uniform shadow mapping.",
month = mar,
booktitle = "ShaderX 4 -- Advanced Rendering Techniques",
editor = "Wolfgang Engel",
isbn = "1-58450-425-0",
series = "ShaderX",
publisher = "Charles River Media",
volume = "4",
keywords = "real-time rendering, shadows",
URL = "http://www.cg.tuwien.ac.at/research/publications/2006/Wimmer-2006/",
}
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