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A Practical Analytic Single Scattering Model for Real Time Rendering by Bo Sun; Ravi Ramamoorthi; Srinivasa G. Narasimhan; Shree K. Nayar is a scholarly article available to read on EtoBox.

What is A Practical Analytic Single Scattering Model for Real Time Rendering about?

We consider real-time rendering of scenes in participating media, capturing the effects of light scattering in fog, mist and haze. While a number of sophisticated approaches based on Monte Carlo and finite element simulation have been developed, those methods do not work at interactive rates. The most common real-time methods are essentially simple variants of the OpenGL fog model. While easy to use and specify, that model excludes many important qualitative effects like glows around light sources, the impact of volumetric scattering on the appearance of surfaces such as the diffusing of glossy highlights, and the appearance under complex lighting such as environment maps. In this paper, we present an alternative physically based approach that captures these effects while maintaining realtime performance and the ease-of-use of the OpenGL fog model. Our method is based on an explicit analytic integration of the single scattering light transport equations for an isotropic point light source in a homogeneous participating medium. We can implement the model in modern programmable graphics hardware using a few small numerical lookup tables stored as texture maps. Our model can also be e

Author

Bo Sun; Ravi Ramamoorthi; Srinivasa G. Narasimhan; Shree K. Nayar

Publisher

ACM

Published

2005

Language

EN