Plausible image based soft shadows using occlusion textures

Elmar Eisemann, Xavier Decoret

Proc. of the Brazilian Symposium on Computer Graphics and Image Processing, 19 (SIBGRAPI) - 2006

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This paper presents a novel image-based approach to render plausible soft shadows for complex dynamic scenes with rectangular light sources. The algorithm's performance is mostly independent of the scene complexity and the source's size. Occluders and receivers do not need to be separated and no knowledge about the scene representation is required, making the method easy to use. The main idea is to approximate the occlusion in the scene with pre-filtered occlusion textures. The visibility of the light source at a point in space is estimated by accumulating the occlusion caused by each texture, using a novel formula based on probabilities.

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BibTex references

@InProceedings { ED06c,
  author       = "Eisemann, Elmar and Decoret, Xavier",
  title        = "Plausible image based soft shadows using occlusion textures",
  booktitle    = "Proc. of the Brazilian Symposium on Computer Graphics and Image Processing, 19 (SIBGRAPI)",
  series       = "Conference Series",
  year         = "2006",
  editor       = "Oliveira Neto and Manuel Menezes deCarceroni and Rodrigo Lima",
  publisher    = "IEEE Computer Society",
  organization = "IEEE",
  note         = "Best paper award",
  keywords     = "soft shadows, real-time, image-based",
  url          = "http://graphics.tudelft.nl/Publications-new/2006/ED06c"
}

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» Elmar Eisemann
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