Masking controls, and a few others, are hidden by default.
You can show them under 'Filtering->Vapoursynth->Misc->UI'. Enabling options there will extend the controls of most of the filters.
To me these artifacts look like a noise source got compressed to strong which caused compression artifacts which then got again distorted (probably due to the defishing and zooming) and then recompressed creating compression artifacts while trying to keep compression artifacts.
This is why I recommend to first denoise&co and use lossless compression (even if the file size is huge) and then use Mercalli and output again to a lossless format before the final filtering and compression.
Since your source isn't really 4k (doesn't really seem to be 1080p even) at the stage you showed me, you might want to consider lowering the resolution and move all other filtering behind the resizing. ('Filtering->Vapoursynth->Misc->Filter Order/Queue' lets you control the order of the filters.)
Cu Selur
Ps.: using something like FFT3DFilter with Sigma 20 and Neo enabled also is rather fast and shows the distorted grid pattern. (which is why the filtering should be done before distorting the image not after)
You can show them under 'Filtering->Vapoursynth->Misc->UI'. Enabling options there will extend the controls of most of the filters.
To me these artifacts look like a noise source got compressed to strong which caused compression artifacts which then got again distorted (probably due to the defishing and zooming) and then recompressed creating compression artifacts while trying to keep compression artifacts.
This is why I recommend to first denoise&co and use lossless compression (even if the file size is huge) and then use Mercalli and output again to a lossless format before the final filtering and compression.
Since your source isn't really 4k (doesn't really seem to be 1080p even) at the stage you showed me, you might want to consider lowering the resolution and move all other filtering behind the resizing. ('Filtering->Vapoursynth->Misc->Filter Order/Queue' lets you control the order of the filters.)
Cu Selur
Ps.: using something like FFT3DFilter with Sigma 20 and Neo enabled also is rather fast and shows the distorted grid pattern. (which is why the filtering should be done before distorting the image not after)
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Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.