Hierarchical Penumbra Casting

Hierarchical Penumbra Casting

We present a novel algorithm for rendering physically-based soft shadows in complex scenes. Instead of casting shadow rays, we place both the points to be shaded and the samples of an area light source into separate hierarchies, and compute hierarchically the shadows caused by each occluding triangl...

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Veröffentlicht in:Computer graphics forum 2005-09, Vol.24 (3), p.313-322
Hauptverfasser: Laine, Samuli, Aila, Timo
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
Computer graphics
Studies
Three dimensional imaging
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Beschreibung
Zusammenfassung:We present a novel algorithm for rendering physically-based soft shadows in complex scenes. Instead of casting shadow rays, we place both the points to be shaded and the samples of an area light source into separate hierarchies, and compute hierarchically the shadows caused by each occluding triangle. This yields an efficient algorithm with memory requirements independent of the complexity of the scene. [PUBLICATION ABSTRACT]
ISSN:0167-7055
1467-8659
DOI:10.1111/j.1467-8659.2005.00856.x