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This page provides information on the Caustic rollout in the Common Tab of the VRayRenderer node.
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Overview
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V-Ray supports the rendering of caustics effects. In order to produce this effect you must have proper caustics generators and caustics receivers in the scene via an VRayObjProp node, and proper caustics settings for the light source itself. In order to calculate the caustics effects, V-Ray uses a technique known as photon mapping. It is a two-pass technique. The first pass consists of shooting particles (photons) from the light sources in the scene, tracing them as they bounce around the scene, and recording the places where the photons hit the object surfaces. The second pass is the final rendering, when the caustics are calculated by using density estimation techniques on the photon hits stored during the first pass.
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GI caustics generated by a self-illuminated object
Notes
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