Convolution Shadow Maps

@inproceedings{Annen2007ConvolutionSM,
  title={Convolution Shadow Maps},
  author={Thomas Annen and Tom Mertens and Philippe Bekaert and Hans-Peter Seidel and Jan Kautz},
  booktitle={Rendering Techniques},
  year={2007}
}
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… CONTINUE READING
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