he talk about it years ago it still kinda here as information:
https://forum.doom9.org/showthread.php?t=171787
Quote:
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disable calibration controls for this display: The display is assumed to have a BT.709 gamut with a pure power gamma of 2.2 (probably).
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and we also got the information that some correction are not done.
the new beta version can detect HLG that was a necessary change after i reported that it is treated as HDR10+ (or something like that) with the internal MPC-BE decoder lav filter at the time didn't send the HLG meta data to madVR
what so ever with a new beta (133 or 134) with HLG it totally ignored the setting could be bt 2020, bt 709 or "no calibration" i get the same image with every source. actually all calibrations setting with my current build are totally ignored so i can't do a proper test for now and i can't report it.
bugs are reported here:
http://bugs.madshi.net/my_view_page.php?refresh=true
i will soon try the release version and the newest beta.