Hi, my opinion based on my 55" Q9F is as follows:
My set up is:
Nothing connected to the one connect box except HDMI 4 which goes to my Dennon X3500 amp.
Plugged into the amp I have a 4k BT vision box, a Now TV stick, a 4k Amazon Fire Stick and an Xbox One S as a 4k bluray/games. I run Netflix and all catch up channels through the xbox because it does Dolby Atmos for everything, either simulated or Native. I control all my devices using a Harmony Elite.
For the TV picture settings, the following is most satisfactory for me for all sources through the amp at any time of day including games, sports, action scenes etc:
Digital clean auto
Auto motion plus off
Local dimming high
Contrast enhancer low
HDR+ mode ON (turn it on first then adjust everthing)
Colour tone warm2
Gamma ST.2048 (its designed for HDR modes)
ST.2048 = 0
Rgb only mode off
Colour space Native
ECO solution, everything off except auto power mode (turn this off if you plug a hard drive in for recording)
One other note, the scale used for the settings varies between models of TV.
Examples on my tv:
Backlight max is 50
Brightness min is -5 max is +5
Contrast max is 50
Sharpness max is 20
Colour max is 50
Tint min is g15 max is r15
So to translate between different sets I work on percentages instead of absolute numbers and judge how it looks from there. Everyone's different so there is no right answer, but these are what work for my mid 40's eyes!
Hope this helps!
Would these settings work on the: Samsung QE65Q90RATX ?
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@NikyWu: According to the user manual an HDMI connection with HDMI UHD Color set to On supports up to UHD 50P/60P 4:4:4 and 4:2:2 input signals. With this in mind it may be worth checking the specs of the Sky Q box to see if a conflict could be occurring. It may also be beneficial to switch HDMI ports, remembering to assign UHD Color to the new port, to see if this helps.
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