The colors might be oversaturating with it turned off. Enhanced colors produced by BT.2020 (DCI-P3) should be subtle compared to BT.709. The difference in gamut size is only 26%. It all depends on what color space you set your projector to. You should match that in madVR.
It is more likely the gamma is different with calibration controls disabled. When disabled, the gamma defaults to 2.20. When active, I think you are using a 2.40 gamma. Try changing the gamma setting in madVR with calibration controls enabled. It should produce a similar result. You don't have to match the gamma of your projector for HDR -> SDR. And the gamma setting won't impact SDR playback.
Last edited by Warner306; 22nd June 2018 at 16:14.
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