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after some testing i found this so far.
RCA is very useful but some more steps between 1 and 4 would be nice. NGU sharp and standard still look pretty bad with files that "need" RCA even with RCA.
RCA softs the image a lot so i tried to compensate it with a sharpener. sharpen edges does nothing when scaling a DVD to UHD while adaptive sharpening is still effective too effective smaller step between 0.0-0.1 would be nice and add grain after sharping would be highly preferred too it is really difficult to use with adaptive sharpening.
RRN is hard to judge i find it useful together with RCA but not much alone.
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