Oct. 22, 2002

Publications on Light Scattering/Transfer :

Mark Pauly et al. :
- Metropolis Light Transport for Participating Media, 2000.
Matt Pharr & Pat Hanrahan :
- Monte Carlo Evaluation of Non-Linear Scattering Equations for Subsurface Reflection, 2000.

BibTeX references.

Metropolis Light Transport for Participating Media

M. Pauly, T. Kollig, A. Keller
Rendering Techniques 2000,
Proceedings of the Eurographics Workshop on Rendering, EGRW 2000
(Brno, Czech Republic, June 26-28, 2000), pp. 11-22, 2000.

Weblink @ ETH, Zurich

Abstract

In this paper we show how Metropolis Light Transport can be extended both in the underlying theoretical framework and the algorithmic implementation to incorporate volumetric scattering. We present a generalization of the path integral formulation that handles anisotropic scattering in non-homogeneous media. Based on this framework we introduce a new mutation strategy that is specifically designed for participating media. Our algorithm includes effects such as volume caustics and multiple volume scattering, is not restricted to certain classes of geometry and scattering models and has minimal memory requirements. Furthermore, it is unbiased and robust, in the sense that it produces satisfactory results for a wide range of input scenes and lighting situations within acceptable time bounds.

Monte Carlo Evaluation of Non-Linear Scattering Equations for Subsurface Reflection

Matt Pharr and Pat Hanrahan, Stanford University

Proceedings of SIGGRAPH, ACM, pp. 75-84, July 2000, New Orleans, LA, USA

Weblink @ Stanford

Weblink @ ACM

Abstract

We describe a new mathematical framework for solving a wide variety of rendering problems based on a non-linear integral scattering equation. This framework treats the scattering functions of complex aggregate objects as first-class rendering primitives; these scattering functions accurately account for all scattering events inside them. We also describe new techniques for computing scattering functions from the composition of scattering objects. We demonstrate that solution techniques based on this new approach can be more efficient than previous techniques based on radiance transport and the equation of transfer and we apply these techniques to a number of problems in rendering scattering from complex surfaces.

Keywords:

Chandrasehkar's equation, Monte Carlo techniques, adding equations, equation of transfer, illumination, invariant imbedding, principles of invariance, reflectance and shading models, rendering, scattering function

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