What you're seeing
The whole frame brightens or darkens abruptly as small bright or dark regions enter and leave the view.
Likely causes
- Bright objects near the screen edge have too much influence on metering.
- Low Percent or High Percent prioritizes unstable brightness ranges.
- Speed Up and Speed Down do not match the intended camera response.
Check in this order
- 01Open HDR Eye Adaptation and watch target, actual, and final EV100 while reproducing the change.
- 02Enable histogram debug and identify bright or dark pixels that should not drive metering.
- 03Use a center-weighted Exposure Metering Mask to reduce edge influence.
- 04Tune Low Percent, High Percent, Speed Up, and Speed Down for the expected camera movement.
Views and commands
Exposure visualization
Show > Visualize > HDR (Eye Adaptation)Shows the luminance histogram and target, actual, and final EV100 values.
Histogram debug
r.EyeAdaptation.VisualizeDebugType 1Marks pixels outside the configured exposure histogram range.
Post Process setting
Exposure > Exposure Metering MaskWeights screen regions so edge highlights have less influence.
Adaptation transition
r.EyeAdaptation.ExponentialTransitionDistance 1.5Restores the documented default transition distance in f-stops for comparison.