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Hierarchical stochastic radiosity for implicitly defined surfaces

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Tobler R. F. , Purgathofer W.

Machine Graphics and Vision

2000

tom Vol. 9, No. 3

561-571

The method presented in this paper calculates global illumination for scenes with implicitly defined surfaces, such as CSG models. A Monte Carlo type particle tracer which directly uses the CSG models distributes the light power in the scene. Global illumination information can be maintained at different resolution levels with the help of a hierarchical storage mechanism for radiosity approximations as the simulation of aprticle proceeds. Shadow leaks and excessive variance of the radiosity values are avoided by filtering the illumination information represented in the octree data structure. Included results show that new method is viable for generating high quality global illumination solutions.