Adaptive Sampler
This sampler makes a variable number of samples per pixel based on the difference in intensity between the pixel and its neighbors.
The following diagram shows visually the way V-Ray is placing samples when using the Adaptive sampler. The black squares represent the pixels of the image while the dots represent the individual samples. In the first pass, V-Ray always places the minimum number of samples determined by the Min subdivs parameter. Then, the color of samples is compared and more are added where needed in the following passes.
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