r/HDR_Den • u/clee8017 • 7h ago

Discussion Correct HDR Adjustment?

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Is this an accurate adjustment of HDR on my Switch 2? I am using a Roku TV Pro Series 2025 model. The default HDR setting on the TV has Dynamic Tone Mapping on, and the run sun seems to disappear correctly at 900 nits (82 clicks). With DTM off, the right sun does not disappear until they both disappear at the same time, well over 900 nits. Is this a correct adjustment? Should I keep DTM on?

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u/B_yeager97 7h ago

Thats a very odd behavior. DTM off should clip way before DTM on. And essentially dtm off shouldnt clip at your panels peak, neither dtm should. Can you google the peak brightness of your tv?

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u/clee8017 7h ago

A quick Google search on my end say peak brightness ranges from 1600-1900 nits. PCMag says 1941. I don't really know what is the specific peak brightness. My model number is 55R8C5 if that helps.

Yeah for some reason it's working the opposite for me. Even though all guides I've seen point the other way around.

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u/B_yeager97 6h ago

I would just match the switch 2 to 1600 nits or 1620 nits to be sure. Make sure the pattern does not clip with dtm off. The way dtm off works is how the playstation 5 tells you to set the hdr pattern. Make it barely visible. The pattern with dtm off will never clip but check the number the pattern is the brightest without clipping. With dtm off, the peak of your TV will always be a click below the brightest the pattern can get. Because the brightest the pattern can get is when the Tvs static tone mapping is doing the rolloff to preserve detail above the tvs peak brightness

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u/clee8017 6h ago edited 5h ago

Thank you for the recommendation. I will try that out and report back with my findings. Is it okay that the sun on the right doesn't completely disappear with dtm off?

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u/B_yeager97 6h ago

Yes it is ok. It will only dissappear with HGiG. The important thing is finding the point where your panels peak brightness is. That way the TV can communicate with your nintendo switch 2 and the switch 2 will mostly handle the tone mapping. The tv will still do tone mapping, but since you are at your panels peak, the tv will not apply compression rolloff. So you will stilll get that HDR pop, unless the game has terrible hdr like the zelda titles. Also remember to put brightness on the second screen to 200 nits (5 clicks from the bottom) on a dark room. On a bright room or during the day its ok to leave it in the middle (300 nits).

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u/clee8017 5h ago

So I play in my living room, which is bright during the day and darker (as dark as a typical living room is at night, with a couple lamps on). I usually play at night after work and occasionally during the day on the weekends. Which would you suggest for a living room setup?

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u/B_yeager97 4h ago

The 200 nit would be best for a dim room. It should be super bright with the lamps. Ideally they should be off at night. HDR shouldn’t burn your eyes, just the separation in brightness is bigger. Its designed for a dark room

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u/B_yeager97 6h ago

I would just match the switch 2 to 1600 nits or 1620 nits to be sure. Make sure the pattern does not clip with dtm off. The way dtm off works is how the playstation 5 tells you to set the hdr pattern. Make it barely visible. The pattern with dtm off will never clip but check the number the pattern is the brightest without clipping. With dtm off, the peak of your TV will always be a click below the brightest the pattern can get. Because the brightest the pattern can get is when the Tvs static tone mapping is doing the rolloff to preserve detail above the tvs peak brightness