Marvel’s Midnight Suns - HDR Settings

The peak brightness in the game seems to be fixed and not adjustable. This game does not seem to use the PS5 system calibration settings. 

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The peak brightness of some CGI cutscenes is limited to 380 nits, which can cause the image to look dim when your TV's tone mapping is off (HGIG mode). Peak brightness during battles is about 950 nits.

If your TV brightness is very different from 1000 nits, then use the tone mapping modes of your tv.