Brecht Van Lommel
5fa68133c9
This gives you "Multiple Importance", "Distance" and "Equiangular" choices. What multiple importance sampling does is make things more robust to certain types of noise at the cost of a bit more noise in cases where the individual strategies are always better. So if you've got a pretty dense volume that's lit from far away then distance sampling is usually more efficient. If you've got a light inside or near the volume then equiangular sampling is better. If you have a combination of both, then the multiple importance sampling will be better. |
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