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GetTransmittance

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		Name	Description
	FLinearColor	GetTransmittance ( const FVector& SunDirection )	This needs to be in this header to be accessible to Lightmass.
	FLinearColor	GetTransmittance ( const FVector& SunDirection, float AtmosphericFogHeightScaleRayl... )	This needs to be in this header to be accessible to Lightmass.

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