Quick answer: Unreal Auto Exposure producing a brief white-out when cutting from dark indoor to bright outdoor? Eye-adaptation simulates real-world adjustment timing — speed it up or pre-set on cut.

A cinematic cuts from a dim hallway to bright daylight. The first second is fully white as auto-exposure adapts.

Speed Up Adaptation

Post Process Volume → Exposure. Speed Up / Speed Down determine adaptation rate. Higher = faster but less “realistic”.

Manual Exposure for Cuts

PPV->Settings.AutoExposureBias = -2.0f;
PPV->Settings.bOverride_AutoExposureBias = true;

On a cinematic cut, override exposure to the target value. After a second of stable framing, restore auto.

Pre-Adapt Before Cut

If the cinematic system supports it, render the destination scene briefly before the cut so the post-process is pre-warmed.

HDR Sky Considerations

HDR skyboxes have huge intensity differences. Tone-map carefully or auto-exposure flips wildly. Bake the sky for the desired apparent brightness.

Verifying

Hard cuts between extreme lighting produce immediate exposure without white-out frames. Cinematics look intentional.

“Auto-exposure adapts over time. For cuts, prime exposure manually.”

Add an exposure-prime track to Sequencer — designers control exposure per cut without needing engineer-level setup.