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Unreal Engine C++ API Reference > Runtime > Engine > Engine > FPostProcessSettings
Syntax
UPROPERTY (Interp, EditAnywhere, BlueprintReadWrite,
Category="Global Illumination|Lumen Global Illumination", AdvancedDisplay,
Meta=(ClampMin=".5", UIMax="4", editcondition="bOverride_LumenSceneLightingUpdateSpeed", DisplayName="Lumen Scene Lighting Update Speed"))
float LumenSceneLightingUpdateSpeed
Remarks
Controls how much Lumen Scene is allowed to cache lighting results to improve performance. Larger scales cause lighting changes to propagate faster, but increase GPU cost.