Time Dependent Photon Mapping

Mike Cammarano, Henrik Wann Jensen
Computer Science Department
Stanford University

To appear in Eurographics Workshop on Rendering '02


The photon map technique for global illumination does not specifically address animated scenes. In particular, prior work has not considered the problem of temporal sampling (motion blur) while using the photon map. In this paper we examine several approaches for simulating motion blur with the photon map. In particular we show that a distribution of photons in time combined with the standard photon map radiance estimate is incorrect, and we introduce a simple generalization that correctly handles photons distributed in both time and space. Our results demonstrate that this time dependent photon map extension allows fast and correct estimates of motion-blurred illumination including motion-blurred caustics.

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This page created by Mike Cammarano, Wed 29 May 2002

Last modified: Tue 4 Jun 2002