When I turn off the light, the environment darkens very slowly!

Development Rendering
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1

Hi everyone! I use lumen for stage lighting. You see it in the attached video. After turning off the lights, it gets dark very slowly!

2

There are commands such as r.LumenScene.SurfaceCache.Clear that can refresh lumen after dramatic light changes.

3

I got it! PostProcessVolume > Advanced >Change the ‘LumenSceneLightingUpdateSpeed’ value and ‘Final Gatter Lighting Update Speed’ value.

4

It is better to simply reset/clear the light caches. Changing the update speed will result in a higher runtime cost to force more frequent updates even when the higher speed is not needed.