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Both renderers have the same sampling quality for the single area light case. For the 7 area light case, PrMan degrades substencially. The reason for the difference is as follow:
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- 3Delight's ray budget is locally adaptive. This means that sampling quality does not depend on the number of lights.
- PrMan's ray budget is per frame and simply divides light
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- samples among the light sources in the scene. This means that as soon as you increase the number of lights, you have to increase the sampling!
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