Radiance caching for efficient global illumination computation

  • Křivánek J
  • Gautron P
  • Pattanaik S
 et al. 
  • 38


    Mendeley users who have this article in their library.
  • 69


    Citations of this article.


In this paper, we present a ray tracing-based method for accelerated global illumination computation in scenes with low-frequency glossy BRDFs. The method is based on sparse sampling, caching, and interpolating radiance on glossy surfaces. In particular, we extend the irradiance caching scheme proposed by Ward et al. to cache and interpolate directional incoming radiance instead of irradiance. The incoming radiance at a point is represented by a vector of coefficients with respect to a hemispherical or spherical basis. The surfaces suitable for interpolation are selected automatically according to the roughness of their BRDF. We also propose a novel method for computing translational radiance gradient at a point.

Author-supplied keywords

  • Directional distribution
  • Global illumination
  • Hemispherical harmonics
  • Ray tracing
  • Spherical harmonics

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Jaroslav Křivánek

  • Pascal Gautron

  • Sumanta Pattanaik

  • Kadi Bouatouch

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free