Originally Posted by amdfanTO
Can you let us know your two workarounds?
They aren't really workarounds or fixes, just something to improve the situation. However, I'm still experimenting with multiple approaches but haven't had a lot of time recently to test some of them really in-depth with lots of actual viewing.
1) Overriding HDMI signal with 750cd/m2 MaxMDL/MaxCLL, technicolor-Preset, DTM off:
This seems to work fairly well with most content (1000nits, 4000nits), especially in a dark room, and does preserve most of the very bright (>2000nits) highlights. The best thing about this is lamps and windows etc. aren't blinding anymore but have a more accurate brightness + shadows are also much more accurate.
2) For 1000nits movies - overriding HDMI signal with 4000cd/m2 MaxMDL/MaxCLL, Standard-Preset:
First of all, you need to change pretty much all of the settings in this preset but you can make it look pretty much like the Cinema/technicolor preset. This is only good for <=1000nits movies though as it clips everything above 800 or so. It's an overall brighter image but the brightness is still balanced across the different tone levels. Basically this will look like "DTM On" but without the boosted shadows and overbrightened highlights.
3) For 4000nits movies or movies above 1000nits:
The above solution 2) doesn't work obviously because of clipping. So you have to either switch to the technicolor-Preset and turn on DTM, or use solution 1).
How you override the HDMI signal is up to you and how tech savvy you are. Something like an HDFury can do it for you with some tinkering. You can also edit the HEVC stream to change the movie's metadata but obviously this requires access to the HEVC stream in the first place.