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It is not uncommon for production scenes to rely heavily on geo area lights. In this test we will compare geo light sampling technology in 3Delight OSL, Arnold and RenderMan. We will use a test with a geometric area light that is composed of a relatively large number of faces. The test, although limited, should allow us to find the convergence rate of each algorithm as well as general performance.
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We use a 1x1 pixel sample in all renderers. Adaptivity is disabled as well as all additional bounces. This is done so to isolate the light sampler. In Arnold, the light samples are attributes of the geometry. In RenderMan/RIS the light samples are attributes of a custom shape. In 3Delight, the light attributes are on Maya's area light.
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Admittedly, those are not standard settings for any useful render. The goal here is to isolate one algorithm in order to understand its behaviour. Understand an algorithm in isolation usuallu sheds light on its strengths and weaknesses and allows to draw interesting conclusion for the more general case. |
| Renderer | Arnold | RenderMan/RIS | 3Delight |
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| Geo Light |
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