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That's hard to say. Most Netflix hdr is mastered to 1000 nits peak if I recall correctly and that's probably what Chad targeted when he did a custom hdr gamma for you?
I suppose the 820 tone mapping might be useful for uhd disks that are mastered for higher peak brightness but I have not used one, myself. So that is conjecture.
Honestly once my lamp starts to age I can't even reach 100nits on my setup at which point sending sdr gamma tends to look better than my custom hdr curve with hdr content......which I know is sacrilege but.....on some content, it's true.
I suppose the 820 tone mapping might be useful for uhd disks that are mastered for higher peak brightness but I have not used one, myself. So that is conjecture.
Honestly once my lamp starts to age I can't even reach 100nits on my setup at which point sending sdr gamma tends to look better than my custom hdr curve with hdr content......which I know is sacrilege but.....on some content, it's true.