Progressive Point-Light-Based Global Illumination


We present a physically-based progressive global illumination system that is capable of simulating complex lighting situations robustly by efficiently using both light and eye paths. Specifically, we combine three distinct algorithms: point-light-based illumination which produces low-noise approximations for diffuse inter-reflections, specular gathering for glossy and singular effects, and a caustic histogram method for the remaining light paths. The combined system efficiently renders low-noise production quality images with indirect illumination from arbitrary light sources including inter-reflections from caustics and allows for simulating depth of field and dispersion effects. Our system computes progressive approximations by continuously refining the solution using a constant memory footprint without the need of pre-computations or optimizing parameters beforehand.

DOI: 10.1111/j.1467-8659.2010.01786.x

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@article{Dammertz2010ProgressivePG, title={Progressive Point-Light-Based Global Illumination}, author={Holger Dammertz and Alexander Keller and Hendrik P. A. Lensch}, journal={Comput. Graph. Forum}, year={2010}, volume={29}, pages={2504-2515} }