New firefly solution! read!

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Cycles: Simple way to eliminate fireflies and excessive noise

So I’ve been using Cycles now for quite a few years and have always wondered about this: Why does a single frame always have a fixed noise pattern seed? Many fireflies virtually never disappear in certain circumstances when all samples in a frame are using the same seed. If, for every sample, for even every x samples, the seed is changed, you can basically eliminate, or greatly reduce, fireflies. A quick way to test this idea is to render a comparison between an image rendered with X samples, c…

The summary is, this technique can reduce aliasing, but I doubt it reduces noise compared to individual sample clamping.