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Permanent link (DOI): https://doi.org/10.7939/R3QR4NT41

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Beyond Faster Photon Map Global Illumination Open Access

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Author or creator
Neilson, Daniel
Yang, Herb
Additional contributors
Subject/Keyword
Computer Graphics
Irradiance cache
Global illumination
Photon map
Ray tracing
Type of item
Report
Language
English
Place
Time
Description
Technical report TR04-23. Precalculating irradiance for photon maps is an enhancement to the photon mapping method that was proposed by Christensen to reduce redundant irradiance calculations during rendering. In this enhancement, irradiance values are precalculated at the location of photons in the photon map prior to rendering and are stored within the photon's data structure. These recalculated irradiance values are then used during rendering. However, this enhancement may calculate irradiance values that are not used during rendering. This paper presents an improvement to Christensen's method, called on-demand caching, that removes these unused irradiance calculations by performing irradiance calculations during rendering and caching the results in the photon map.
Date created
2004
DOI
doi:10.7939/R3QR4NT41
License information
Creative Commons Attribution 3.0 Unported
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