How to configure MBP XDR screen to fixed 1000nits brightness with software dimming only to help with PWM?

[eret9616]

I set combined brightness on macbook pro , the back cover behind the screen on the A side of the laptop is very hot on my m4 max machine, but on my m1 pro not hot at all.

I found it locked to 1600nits,I hope it can set to 1000nit , maybe can solve this problem?
using a m4 max macbook pro , on my m1 macbook pro there is no problem.

[waydabber]

The combined brightness 160% only adjusts the scale and is relevant only with software upscaling. For native upscaling it is not relevant.

If you use software upscaling (combined brightness), you can still adjust the max HDR upscaling by using the calibration feature.

But I don't fully understand the settings you are using - what do you want to achieve exactly? :)

[eret9616]

The combined brightness 160% only adjusts the scale and is relevant only with software upscaling. For native upscaling it is not relevant.

If you use software upscaling (combined brightness), you can still adjust the max HDR upscaling by using the calibration feature.

But I don't fully understand the settings you are using - what do you want to achieve exactly? :)

I hope to achieve software dimming with a maximum backlight of 1000 nits to minimize PWM as much as possible. The issue is that I found that on the M1 Pro, setting the screen brightness this way doesn’t cause the back of the screen to heat up, but on the M4 Max, it gets very hot, with a significant difference...
I want to know where the difference lies and what might be causing the issue...

[waydabber]

Then simply configure things exactly like this:

This should give you 1000nits brightness + all software dimming only.

I am not sure why the M4 max would be hotter, it should be the other way around as it has more efficient LEDs.

[eret9616]

!
Hello, I have already set it up according to these options, and found that the settings options for combined-brightness are no longer available.
Now there are only these:

There were these options before:
（https://github.com/waydabber/BetterDisplay/wiki/Eye-care:-prevent-PWM-and-or-temporal-dithering#preventing-pwm）
And when controlling the brightness, the pattern has changed to:

Instead of:

Is this correct?
What do these icons mean? I thought the ones below represent software-based brightness adjustment...