Computing caustic effects by backward beam tracing

Jung-Hong Chuang*, Shih Ann Cheng

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Scopus citations


Caustic effects produced by the transport of light from specular surfaces to diffuse surfaces are a common type of optical effect that cannot be modeled by ray tracing. We propose a two-pass algorithm to model caustic effects efficiently and reliably. In the proposed method, information on transmitted light beams is collected in a tree structure, which is used to compute the intensity efficiently. The method does not require the polygonization of diffuse surfaces and can easily be combined with any rendering algorithm.

Original languageEnglish
Pages (from-to)156-166
Number of pages11
JournalThe Visual Computer
Issue number3
StatePublished - 1 Mar 1995


  • Backward beam tracing
  • Caustic effects
  • Ray tracing

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