Ray tracing volume densities

  • Authors:
  • James T. Kajiya;Brian P Von Herzen

  • Affiliations:
  • California Institute of Technology, Pasadena, Calif;California Institute of Technology, Pasadena, Calif

  • Venue:
  • SIGGRAPH '84 Proceedings of the 11th annual conference on Computer graphics and interactive techniques
  • Year:
  • 1984

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Abstract

This paper presents new algorithms to trace objects represented by densities within a volume grid, e.g. clouds, fog, flames, dust, particle systems. We develop the light scattering equations, discuss previous methods of solution, and present a new approximate solution to the full three-dimensional radiative scattering problem suitable for use in computer graphics. Additionally we review dynamical models for clouds used to make an animated movie.