Real-time droplet modeling using color-space environment matting

Biswarup Choudhury*, Pisith Hao, Sharat Chandran

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review


Amongst all atmospheric phenomena, rain is probably the most commonly used effect to create realistic immersive virtual environments, and to set the mood in movie storytelling. Although not immediately obvious, the beauty of rain emanates from the interplay of the involved light-matter interaction, generating effects of refraction and reflection, coupled with scattering effects. At the core, rain consists of water droplets under the influence of gravity. Current state of the art methods of generating rain are either computationally burdening, or not realistic enough. The key idea we introduce in this paper is to consider these droplets as transparent objects in the environment matting (EM) framework. This enables careful preprocessing to discover the light transport phenomena. We end up with a free-viewpoint real-time technique of simulating realistic droplets and rain in novel environments.

Original languageEnglish (US)
StatePublished - 2009
Externally publishedYes
EventSIGGRAPH 2009: Posters, SIGGRAPH '09 - New Orleans, LA, United States
Duration: Aug 3 2009Aug 7 2009


OtherSIGGRAPH 2009: Posters, SIGGRAPH '09
Country/TerritoryUnited States
CityNew Orleans, LA

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Human-Computer Interaction
  • Software


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