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select a term from the list on the left to see the description. - the suggestion of another term
- the correction of a wrong or missleading statement (i hope there are none)
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or caustic shading
A visual effect seen when light is reflected off a specular or reflective surface, or focused through a refractive surface, so that it indirectly illuminates other surfaces with focused light patterns. The best example would be a glass of water on a table. The glass and the water refract and bundle the incoming light, which, when hitting the table, generate bright patterns. Best seen in sunlight or in a room with one bright light source.
In 3D graphics, caustics are rendered as a type of global illumination, often using Photon Mapping or Bi-directional Raytracing techniques.
FinalRender (used by MadTom Productions) simulates this effect by using the Photon Mapping technique.
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3D CG Glossary 
