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> Unreal Engine API Reference > Runtime > Engine > Components > UExponentialHeightFogComponent

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UExponentialHeightFogComponent

Used to create fogging effects such as clouds but with a density that is related to the height of the fog.

Inheritance Hierarchy

UObjectBase

UObjectBaseUtility

UObject

UActorComponent

USceneComponent

UExponentialHeightFogComponent

References

Module	Engine
Header	/Engine/Source/Runtime/Engine/Classes/Components/ExponentialHeightFogComponent.h
Include	#include "Components/ExponentialHeightFogComponent.h"

Syntax

class UExponentialHeightFogComponent : public USceneComponent

Remarks

Used to create fogging effects such as clouds but with a density that is related to the height of the fog.

Variables

	Name	Description
bool	bEnableVolumetricFog	Whether to enable Volumetric fog.
bool	bOverrideLightColorsWithFogInscatteringColors	Whether to use FogInscatteringColor for the Sky Light volumetric scattering color and DirectionalInscatteringColor for the Directional Light scattering color.
float	DirectionalInscatteringExponent	Controls the size of the directional inscattering cone, which is used to approximate inscattering from a directional light.
FLinearColor	DirectionalInscatteringLuminance	Controls the color of the directional inscattering, which is used to approximate inscattering from a directional light.
float	DirectionalInscatteringStartDistance	Controls the start distance from the viewer of the directional inscattering, which is used to approximate inscattering from a directional light.
float	FogCutoffDistance	Scene elements past this distance will not have fog applied.
float	FogDensity	Global density factor.
float	FogHeightFalloff	Height density factor, controls how the density increases as height decreases.
FLinearColor	FogInscatteringLuminance
float	FogMaxOpacity	Maximum opacity of the fog.
float	FullyDirectionalInscatteringColorDistance	Distance at which InscatteringColorCubemap should be used directly for the Inscattering Color.
TObjectPtr< cla...	InscatteringColorCubemap	Cubemap that can be specified for fog color, which is useful to make distant, heavily fogged scene elements match the sky.
float	InscatteringColorCubemapAngle	Angle to rotate the InscatteringColorCubemap around the Z axis.
FLinearColor	InscatteringTextureTint	Tint color used when InscatteringColorCubemap is specified, for quick edits without having to reimport InscatteringColorCubemap.
float	NonDirectionalInscatteringColorDistance	Distance at which only the average color of InscatteringColorCubemap should be used as Inscattering Color.
FExponentialHei...	SecondFogData	Settings for the second fog. Setting the density of this to 0 means it doesn't have any influence.
FLinearColor	SkyAtmosphereAmbientContributionColorScale	Color used to modulate the SkyAtmosphere component contribution to the non directional component of the fog.
float	StartDistance	Distance from the camera that the fog will start, in world units.
FColor	VolumetricFogAlbedo	The height fog particle reflectiveness used by volumetric fog.
float	VolumetricFogDistance	Distance over which volumetric fog should be computed, after the start distance.
FLinearColor	VolumetricFogEmissive	Light emitted by height fog.
float	VolumetricFogExtinctionScale	Scales the height fog particle extinction amount used by volumetric fog.
float	VolumetricFogNearFadeInDistance	Distance over which volumetric fog will fade in from the start distance.
float	VolumetricFogScatteringDistribution	Controls the scattering phase function - how much incoming light scatters in various directions.
float	VolumetricFogStartDistance	Distance from the camera that the volumetric fog will start, in world units.
float	VolumetricFogStaticLightingScatteringIntensity

Constructors

	Name	Description
	UExponentialHeightFogComponent ( const FObjectInitializer& ObjectIn... )

Functions

		Name	Description
	void	AddFogIfNeeded()
	void	SetDirectionalInscatteringColor ( FLinearColor Value )
	void	SetDirectionalInscatteringExponent ( float Value )
	void	SetDirectionalInscatteringStartDistance ( float Value )
	void	SetFogCutoffDistance ( float Value )
	void	SetFogDensity ( float Value )
	void	SetFogHeightFalloff ( float Value )
	void	SetFogInscatteringColor ( FLinearColor Value )
	void	SetFogMaxOpacity ( float Value )
	void	SetFullyDirectionalInscatteringColorDistance ( float Value )
	void	SetInscatteringColorCubemap ( UTextureCube* Value )
	void	SetInscatteringColorCubemapAngle ( float Value )
	void	SetInscatteringTextureTint ( FLinearColor Value )
	void	SetNonDirectionalInscatteringColorDistance ( float Value )
	void	SetSecondFogData ( FExponentialHeightFogData NewValue )
	void	SetSecondFogDensity ( float Value )
	void	SetSecondFogHeightFalloff ( float Value )
	void	SetSecondFogHeightOffset ( float Value )
	void	SetStartDistance ( float Value )
	void	SetVolumetricFog ( bool bNewValue )
	void	SetVolumetricFogAlbedo ( FColor NewValue )
	void	SetVolumetricFogDistance ( float NewValue )
	void	SetVolumetricFogEmissive ( FLinearColor NewValue )
	void	SetVolumetricFogExtinctionScale ( float NewValue )
	void	SetVolumetricFogScatteringDistribution ( float NewValue )

Overridden from UActorComponent

	Name	Description
void	CreateRenderState_Concurrent ( FRegisterComponentContext* Con... )	Used to create any rendering thread information for this component
void	DestroyRenderState_Concurrent()	Used to shut down any rendering thread structure for this component
void	SendRenderTransform_Concurrent()	Called to send a transform update for this component to the rendering thread

Overridden from UObject

	Name	Description
bool	CanEditChange ( const FProperty* InProperty )	Called by the editor to query whether a property of this object is allowed to be modified.
void	PostEditChangeProperty ( FPropertyChangedEvent& PropertyCha... )	Called when a property on this object has been modified externally
void	PostInterpChange ( FProperty* PropertyThatChanged )	This is called when property is modified by InterpPropertyTracks
void	Serialize ( FArchive& Ar )	Handles reading, writing, and reference collecting using FArchive.

Deprecated Variables

		Name	Description
	FLinearColor	DirectionalInscatteringColor_DEPRECATED
	FLinearColor	FogInscatteringColor_DEPRECATED

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