Higher gamma at lower IRE’s – Custom Gamma

[Dushyant Patel]

Does anyone have an idea on how I can replicate the tone curve / gamma from my C9 onto my C6?

To my surprise after running a 3D LUT on my C9 I actually prefer the default gamma that crushes a little near black. It hides so many nasty artifacts. My C6 massively suffers from that problem – a 3D LUT dramatically improved things as did debanding and on really bad content (GoT!) I use brightness at 48 but I’d prefer to also use the C9’s approach. It’s been a remarkable improvement for me.

I see there’s an option for custom but all I really want to do is at very low levels crush the black / create higher gamma. Any advice?

I’ve checked the documentation – I understand I can change the shape of the gamma curve but I’m not sure how to impact only the lower IREs.

Thanks 🙂

[Florian Höch]

On the 3D LUT tab, set gamma type to relative and output offset to 100%.

[Dushyant Patel]

Thanks 🙂

[Dushyant Patel]

So I tried this but I’m still getting the same results. Is there anyway to bypass gamma  and greyscale calibration and only do colour?

[Dushyant Patel]

What I’m trying to achieve is similar to this thread: https://hub.displaycal.net/forums/topic/is-it-possible-to-make-a-custom-gamma-curve/

But rather than having a lower gamma at low IRE’s I want higher. i.e. 2.6.2.8

[Florian Höch]

That’s not possible without creating files by hand. I.e. calculate the XYZ for the desired response (grayscale + primaries will suffice), manually create a measurement (.ti3) file in a text editor, and use that to create a profile to be used as input profile for the standalone 3D LUT maker.

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