These can be seen easily on gray card photos. Using uniform blue surface is even better for that. I’m interested only in the “luma grain”, so checked “B&W Grain”. Only few don’t obviously show repeating pattern. My, still unverified, choice would be one of
Maybe few other would qualify, but most of them are usable only for “busy” photos.
FP 8.0 release notes state that “The grain pattern applied to images is now unique for each rendering, avoiding repetitive texture patterns and delivering a more natural film look”, but clearly it wasn’t delivered.
From my old post DeepPRIME grid artifacts at insane settings - #5 by Wlodek about PL7/FP7:
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The grain provided by DxO probably comes from replicating the scan of 7x7mm
film area and the repeating pattern can be quite visible for some films.
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I don’t know if I’ll use grain in practice - and if I do, I’ll just pick one that doesn’t look so bad. But I can’t give DxO a pass here. I submitted the bug report today as well as some critical feedback about FP8.