MinBrightness

A good value should be positive near 0. This is the minimum brightness the auto exposure can adapt to. It should be tweaked in a dark lighting situation (too small: image appears too bright, too large: image appears too dark). Note: Tweaking emissive materials and lights or tweaking auto exposure can look the same. Tweaking auto exposure has global effect and defined the HDR range - you don't want to change that late in the project development. Eye Adaptation is disabled if MinBrightness = MaxBrightness