Wondering if anyone else is experiencing issues with local dimming on the Samsung Q80R. I have the 82" model and it's great, but the dimming is driving me crazy. It's turning off entire regions of the screen at a time in dark scenes to the point that all details are lost and it only returns when there is something light on the screen (e.g. even bringing up the playback controls will stop the dimming temporarily).
Settings are mostly the default "movie" picture settings, with all the "smart" processing turned off. Eco mode is off and there is no automatic brightness adjustment on. The only thing is, I can't completely disable local dimming (only option is "low"). Now, we noticed the issue at first because I turned the backlight to 0 because the image looked best that way in the very dark/light controlled room. I eventually found that turning the backlight up to 3 or 4 will make the video watch-able but the dimming is still distracting and driving me a little crazy. Going up to more like 10/12 seems to hide any of the issues.
Here's a video I made to try to show the issue with a few different backlight settings over the same few scenes in HBO's His Dark Materials where it was un-watchable (view in 4k full screen to get a better look at the details):
The video shows some side-by-side comparisons where details are clearly lost due to dimming (and you can see regions of the screen noticeably dim as the scene gets dark). I recorded this on a camera with a constant aperture/shutter, so the changes in brightness (except maybe once where I'm trying to get the on-screen display to show in the video) are all as seen by the TV. Sorry for the bad focus, got kind of lazy.
Can anyone tell me how to access the hidden menu that would let me turn dimming off (I had read there was some way to do it on the rtings calibration page)? I'm about ready to buy a remote if it's actually possible to turn it off that way. Or are there other settings that I might try first? Or do I just need to live with a higher backlight setting?