Convolution Shadow Maps

Annen, Thomas; Mertens, Tom; Bekaert, Philippe; Seidel, Hans-Peter; Kautz, Jan

Convolution Shadow Maps

Files

051-060.pdf (683.8 KB)

Date

2007

Authors

Annen, Thomas
Mertens, Tom
Bekaert, Philippe
Seidel, Hans-Peter
Kautz, Jan

Publisher

The Eurographics Association

Abstract

We present Convolution Shadow Maps, a novel shadow representation that affords efficient arbitrary linear filtering of shadows. Traditional shadow mapping is inherently non-linear w.r.t. the stored depth values, due to the binary shadow test. We linearize the problem by approximating shadow test as a weighted summation of basis terms. We demonstrate the usefulness of this representation, and show that hardware-accelerated anti-aliasing techniques, such as tri-linear filtering, can be applied naturally to Convolution Shadow Maps. Our approach can be implemented very efficiently in current generation graphics hardware, and offers real-time frame rates.

        @inproceedings{:10.2312/EGWR/EGSR07/051-060
,
booktitle = {Rendering Techniques
},
editor = {Jan Kautz and Sumanta Pattanaik
},
title = {{Convolution Shadow Maps
}},
author = {Annen, Thomas and 
Mertens, Tom and 
Bekaert, Philippe and 
Seidel, Hans-Peter and 
Kautz, Jan
},
year = {2007
},
publisher = {The Eurographics Association
},
ISSN = {1727-3463
},
ISBN = {978-3-905673-52-4
},
DOI = {/10.2312/EGWR/EGSR07/051-060
}
}