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Precomputed radiance transfer as a variance reduction technique - a small case study

: Schwenk, Karsten


Kuijper, Arjan (Ed.); Sourin, A. (Ed.); Fellner, Dieter W. (General Chairs) ; Fraunhofer-Institut für Graphische Datenverarbeitung -IGD-, Darmstadt; TU Darmstadt; European Association for Computer Graphics -EUROGRAPHICS-; Institute of Electrical and Electronics Engineers -IEEE-; International Federation for Information Processing -IFIP-, Working Group 5.10 Computer Graphics:
International Conference on Cyberworlds, CW 2012. Proceedings : 25-27 Sept. 2012, Darmstadt, Germany
Los Alamitos/Calif.: IEEE Computer Society Conference Publishing Services, 2012
ISBN: 978-0-7695-4814-2
ISBN: 978-1-4673-2736-7 (Print)
DOI: 10.1109/CW.2012.55
International Conference on Cyberworlds (CW) <11, 2012, Darmstadt>
Conference Paper
Fraunhofer IGD ()
3D rendering; importance sampling; Precomputed Radiance Transfer (PRT); Variance Reduction

We present a small case study in which we evaluate the potential of the precomputed radiance transfer (PRT) algorithm as a means of variance reduction in path tracing. We describe how to use PRT solutions as correlated functions for both correlated and importance sampling in a straightforward way and study how each approach reduces noise in images rendered with path tracing.