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Lukas Stockner cc600de669 Cycles Denoising: Get rid of halos around bright edges ...

Previously, bright edges (e.g. caused by rim lighting) would sometimes get
halos around them after denoising.

This change introduces a log(1+x) highlight compression step that is performed
before denoising and reversed afterwards. That way, the denoising algorithm
itself operates in the compressed space and therefore bright edges cause less
numerical issues.

2019-06-01 00:45:03 +02:00

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