Global ray-bundle tracing with infinite number of rays

The paper presents a combined nite element and quasi-random walk method to solve the general rendering equation. Applying nite element techniques, the surfaces are decomposed into planar patches that are assumed to have position independent , but not direction independent (that is non-diiuse) radiance. The direction dependent radiance function is then computed by quasi-random walk. Since quasi-Monte Carlo quadrature is applied here to an integrand of nite variation, this method can take advantage of the superior convergence of quasi-Monte Carlo integration.