Advice for gamma/tone curve with Resolve

[Cameron Oatley]

I’m having an issue with my current calibration and I’m not sure what I’m doing wrong.
I’m outputting to my display using a BMD decklink, monitor is an Eizo CS2740.

I’m also just using the built in DisplayCAL “Video 3D LUT for Resolve (D65, Rec. 709 / Rec. 1886)” preset, which uses black level and tone curve “As measured”. But after calibration, it seems to lift blacks noticeably, giving a lower contrast or ‘lifted’ look which is making it hard to actually judge contrast or darker regions properly.

I don’t have black level drift compensation enabled.

Why might this be happening? The only thing I can think of is maybe having “video” levels going through the decklink but DisplayCal and Resolve both recommend keeping it on that, and even with it set to “video” level output, disabling the monitoring LUT in resolve restores the black levels down to where they ‘should’ be rather than a more grey/higher luminance output.

I’ve attached a couple photos just showing a gradient ramp taken with the same ISO/Exposure on my camera to show the difference. (Obviously not helpful in an absolute sense but shows the difference/problem at least)

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[Vincent]

-it has nothing to do with “as measured” (profiling stage)

-it’s related to LUT3D (after profiling stage), what you tell app that you want to simulate

-do not use Rec1886 (google it), explained in the other thread

-video level test is done with a set of sample images/video files in your video Editor or directly through the monitor (HCFR / PGenerator / PGenerator+ are useful tools to test displays “not connected to a computer graphic card” but you’ll net a RaspberryPi4 -maybe pi3 on some simpler images-)
It’s a visual test to see cliping or not after 235 white on a test image.
AVSForum or HCFR should have samples for that.

• This reply was modified 1 month, 1 week ago by Vincent.

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