"Luminance Shift/Flicker" refers to a change/ multiple changes in the brightness levels within a shot/ scene.
Luminance Shift/Flicker impacts the Technical and Content Quality of the asset. It can distract from the creative on screen action, and in severe instances, potentially obscure plot pertinent elements.
Source of luminance shifting can reasonably be attributed to an on screen element or is understood based on contextual cues (e.g. strobe lights in a nightclub or character turns away from a practical light source).
Changes in luminance are not reasonably discernible as creative and distract from on screen action.
How to Prevent:
Review for luminance consistency across shots. Apply luminance changes uniformly across similar shots, cut to cut whenever possible to minimize abrupt shifts mid-shot.
Confirm if creative intent or best possible. Otherwise, affected shots must be regraded to maintain consistent brightness and minimize unnecessary shifting mid-shot.