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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_LumenFinalGatherLightingUpdateSpeed", DisplayName="Final Gather Lighting Update Speed"))
float LumenFinalGatherLightingUpdateSpeed
Remarks
Controls how much Lumen Final Gather is allowed to cache lighting results to improve performance. Larger scales cause lighting changes to propagate faster, but increase GPU cost and noise.