HDR and dynamic contrast

[mar3o]

I've been experimenting and on my UH8500 I have found that LED local dimming is better on high for HDR. I leave it on medium for SDR for the reasons I mentioned above, but due to the brightness of HDR and the backlight being cranked up to 20, the vertical local dimming "pillars' of this set are especially noticeable and annoying, especially when they cut across the letterbox bars. By bumping LED local dimming up to high, it helps mask those pillars more, and the brightness of the HDR offsets any highlight dimming that happens on high in SDR mode.