Photorealistic rendering of rain streaks
ACM SIGGRAPH 2006 Papers
Real-time rendering of realistic rain
ACM SIGGRAPH 2006 Sketches
Artist-directable real-time rain rendering in city environments
ACM SIGGRAPH 2006 Courses
Fast color-space decomposition based environment matting
Proceedings of the 2008 symposium on Interactive 3D graphics and games
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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.