Eric P. Lafortune and Yves D. Willems
Proceedings of the Seventh Eurographics Workshop on Rendering, Porto, Portugal (June 1996), pp. 92-101.
Published as: Rendering Techniques '96, X. Pueyo, P. Schröder (editors), pp. 91-101.
In this paper we show how bidirectional path tracing can be extended to handle global illumination effects due to participating media. The resulting image-based algorithm is computationally expensive but more versatile than previous solutions. It correctly handles multiple scattering in non-homogeneous, anisotropic media in complex illumination situations. We illustrate its specific advantages by means of examples.
This paper is available on-line as a gzip'ed Postscript file (10 pages, 2000 KBytes, expands to 4665 KBytes).