in 5.1 i see Extend default luminance range in Auto Exposure settings… it says in the notes when i mouse over it " Extend Default Luminance Range in Auto Exposure Settings.
Whether the default values for Auto Exposure should support an extended range of scene luminance. Also changes the exposure settings to be expressed in EV100. Having this setting disabled is deprecated and can only be done manually using r.DefaultFeature.AutoExposure.ExtendDefaultLuminanceRange."