Gamma and 20-point IRE adjustment
I've read...a lot, over the past week or so. Curt Palme's ChromaPure and HCFR guides, the Basic Guide, the Certainly Not Complete guide, and a few other threads, and done a bit of Googling.
I can't find out what the 'adjustment luminance' and 'target luminance' are in my LG OLED55C6T's 20-point IRE white balance control. It appears to be a gamma adjustment? The target can only be set for 100 "IRE", but doesn't seem to do anything. Adjustment is available at all levels. It occurred to me the 'target' for levels below 100 might be about gamma, and indeed changing the set's gamma alters the targets for the lower levels even if 100 is left at the default 130.
So...am I aiming to hit the target levels in order to set gamma as selected? What units are they in? I think 130 nits comes out at around 37 fL, which is within the usual recommended range for an LCD, so is that it? Find a peak white I'm happy with, enter its value in nits as the target, and adjust aiming for the target at each "IRE" point?
I've gone through all the arguments about 2.5 vs 2.2 gamma, but haven't seen anything on BT.1886. This seems like it would suit a brighter room better? Should I go with that for daytime casual viewing, and 2.4 for cinema? Or BT.1886 across the board? Or would BT.1886 not do as good a job in daylight as I'm thinking?
Are there other adjustments that should be made for daylight? I have a giant window right next to my TV, unfortunately, and for casual viewing I'm not going to bother trying to light-control, particularly since the room is also open to the entire rest of the house.
My i1 arrives tomorrow, am I going to have any difficulty with it based on the screen being curved? All guides say to have it flat against the screen.
I've already had a quick run-through with my Spears & Munsil disc, my eyeballs, and brightness and contrast patterns and I already struggle to watch the factory-default TV in the other room.