Monte Carlo Methods for Volumetric Light Transport Simulation

1Disney Research 2Solid Angle 3Karlsruhe Institute of Technology 4Dartmouth College

In Computer Graphics Forum (Proceedings of Eurographics - State of the Art Reports), 2018

Teaser
Losses and gains of radiance due to absorption (a), scattering (b, c), and emission (d) within a differential volume element.

Abstract

The wide adoption of path-tracing algorithms in high-end realistic rendering has stimulated many diverse research initiatives. In this paper we present a coherent survey of methods that utilize Monte Carlo integration for estimating light transport in scenes containing participating media. Our work complements the volume-rendering state-of-the-art report by Cerezo et al. [2005]; we review publications accumulated since its publication over a decade ago, and include earlier methods that are key for building light transport paths in a stochastic manner. We begin by describing analog and non-analog procedures for free-path sampling and discuss various expected-value, collision, and track-length estimators for computing transmittance. We then review the various rendering algorithms that employ these as building blocks for path sampling. Special attention is devoted to null-collision methods that utilize fictitious matter to handle spatially varying densities; we import two “next-flight” estimators originally developed in nuclear sciences. Whenever possible, we draw connections between image-synthesis techniques and methods from particle physics and neutron transport to provide the reader with a broader context.

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Text Reference

Jan Novák, Iliyan Georgiev, Johannes Hanika, Wojciech Jarosz. Monte Carlo Methods for Volumetric Light Transport Simulation. Computer Graphics Forum (Proceedings of Eurographics - State of the Art Reports), 37(2), May 2018.

BibTex Reference

@article{novak18monte,
    author = "Novák, Jan and Georgiev, Iliyan and Hanika, Johannes and Jarosz, Wojciech",
    title = "Monte Carlo Methods for Volumetric Light Transport Simulation",
    journal = "Computer Graphics Forum (Proceedings of Eurographics - State of the Art Reports)",
    volume = "37",
    number = "2",
    month = "may",
    year = "2018"
}

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© The Author(s). This is the author's version of the work. It is posted here by permission of The Eurographics Association for your personal use. Not for redistribution. The definitive version is available at diglib.eg.org.