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Abstract

Producing high quality animations featuring rich object appearance and
compelling lighting effects is very time consuming using traditional
frame-by-frame rendering systems. In this paper we present a rendering
architecture for computing multiple frames at once by exploiting the coherence
between image samples in the temporal domain. For each sample representing a
given point in the scene we update its view-dependent components for each frame
and add its contribution to pixels identified through the compensation of
camera and object motion. This leads naturally to a high quality motion blur
and significantly reduces the cost of illumination computations. The required
visibility information is provided using a custom ray tracing acceleration data
structure for multiple frames simultaneously. We demonstrate that precise
and costly global illumination techniques such as bidirectional path tracing
become affordable in this rendering architecture.