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This page provides information about adaptive sampling as implemented by V-Ray.


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V-Ray is an adaptive sampling engine. This means that whenever V-Ray needs to compute a value, like the color of a pixel, or the light reflected from a surface, V-Ray will take a varying number of samples for that value, depending on the context. The adaptive algorithm that V-Ray uses is very straightforward: for any effect that requires several samples, V-Ray first computes a small amount of samples, and then, if the variance of the samples is too big, it continues to take more samples until the result is good enough.


Beginning with V-Ray 3.10, the VRayMtl materials and the VRayLight include a built-in DMC calculator that shows how the particular shading effect will be sampled under the current renderer settings. The values update interactively as the user adjusts the renderer settings or the material/light subdivs values.


Image RemovedThe VRayMtl material showing sampling of glossy reflections and refractions.


The VRayLight showing sampling of a rectangle light.