VolumetricFog.cpp File Reference

#include "VolumetricFog.h"
#include "BasePassRendering.h"
#include "FogRendering.h"
#include "RendererPrivate.h"
#include "ScenePrivate.h"
#include "SceneProxies/SkyLightSceneProxy.h"
#include "SceneUtils.h"
#include "GlobalDistanceField.h"
#include "GlobalDistanceFieldParameters.h"
#include "DistanceFieldAmbientOcclusion.h"
#include "DistanceFieldLightingShared.h"
#include "VolumetricFogShared.h"
#include "VolumeRendering.h"
#include "ScreenRendering.h"
#include "VolumeLighting.h"
#include "PipelineStateCache.h"
#include "ShaderParameterStruct.h"
#include "Math/Halton.h"
#include "VolumetricCloudRendering.h"
#include "Lumen/LumenTranslucencyVolumeLighting.h"
#include "GenerateConservativeDepthBuffer.h"
#include "VirtualShadowMaps/VirtualShadowMapClipmap.h"
#include "ProfilingDebugging/CpuProfilerTrace.h"
#include "DataDrivenShaderPlatformInfo.h"
#include "LightFunctionAtlas.h"
#include "Math/UnrealMathUtility.h"
#include "RayTracing/RayTracing.h"
#include "Nanite/NaniteRayTracing.h"
#include "RHIResourceUtils.h"
#include "PSOPrecacheValidation.h"

Classes
class	FVolumetricFogMaterialSetupCS
class	FWriteToBoundingSphereVS
class	FInjectShadowedLocalLightPS
class	FCircleRasterizeVertexBuffer
class	FCircleRasterizeIndexBuffer
class	FVolumetricFogLightScatteringCS
class	FVolumetricFogFinalIntegrationCS

Functions
FAutoConsoleVariableRef	CVarVolumetricFog (TEXT("r.VolumetricFog"), GVolumetricFog, TEXT("Whether to allow the volumetric fog feature."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarVolumetricFogInjectShadowedLightsSeparately (TEXT("r.VolumetricFog.InjectShadowedLightsSeparately"), GVolumetricFogInjectShadowedLightsSeparately, TEXT("Whether to allow the volumetric fog feature."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarVolumetricFogDepthDistributionScale (TEXT("r.VolumetricFog.DepthDistributionScale"), GVolumetricFogDepthDistributionScale, TEXT("Scales the slice depth distribution."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarVolumetricFogGridPixelSize (TEXT("r.VolumetricFog.GridPixelSize"), GVolumetricFogGridPixelSize, TEXT("XY Size of a cell in the voxel grid, in pixels."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarVolumetricFogGridSizeZ (TEXT("r.VolumetricFog.GridSizeZ"), GVolumetricFogGridSizeZ, TEXT("How many Volumetric Fog cells to use in z."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarVolumetricFogTemporalReprojection (TEXT("r.VolumetricFog.TemporalReprojection"), GVolumetricFogTemporalReprojection, TEXT("Whether to use temporal reprojection on volumetric fog."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarVolumetricFogJitter (TEXT("r.VolumetricFog.Jitter"), GVolumetricFogJitter, TEXT("Whether to apply jitter to each frame's volumetric fog computation, achieving temporal super sampling."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarVolumetricFogHistoryWeight (TEXT("r.VolumetricFog.HistoryWeight"), GVolumetricFogHistoryWeight, TEXT("How much the history value should be weighted each frame. This is a tradeoff between visible jittering and responsiveness."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarVolumetricFogHistoryMissSupersampleCount (TEXT("r.VolumetricFog.HistoryMissSupersampleCount"), GVolumetricFogHistoryMissSupersampleCount, TEXT("This reduces noise when panning or on camera cuts, but introduces a variable cost to volumetric fog computation. Valid range [1, 16]."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarInverseSquaredLightDistanceBiasScale (TEXT("r.VolumetricFog.InverseSquaredLightDistanceBiasScale"), GInverseSquaredLightDistanceBiasScale, TEXT("Scales the amount added to the inverse squared falloff denominator. This effectively removes the spike from inverse squared falloff that causes extreme aliasing."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarVolumetricFogEmissive (TEXT("r.VolumetricFog.Emissive"), GVolumetricFogEmissive, TEXT("Whether to allow the volumetric fog emissive component."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarVolumetricFogConservativeDepth (TEXT("r.VolumetricFog.ConservativeDepth"), GVolumetricFogConservativeDepth, TEXT("[Experimental] Whether to allow the volumetric to use conservative depth to accelerate computations."), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarVolumetricInjectRaytracedLights (TEXT("r.VolumetricFog.InjectRaytracedLights"), GVolumetricFogInjectRaytracedLights, TEXT("Whether lights with ray traced shadows are injected into volumetric fog"), ECVF_Scalability|ECVF_RenderThreadSafe)
FAutoConsoleVariableRef	CVarLightScatteringSampleJitterMultiplier (TEXT("r.VolumetricFog.LightScatteringSampleJitterMultiplier"), GLightScatteringSampleJitterMultiplier, TEXT("Multiplier for random offset value used to jitter each world sample position when generating the 3D fog volume. Enable/disable with r.VolumetricFog.Jitter"), ECVF_RenderThreadSafe|ECVF_Scalability)
int32	GetVolumetricFogGridPixelSize ()
	IMPLEMENT_GLOBAL_SHADER_PARAMETER_STRUCT (FVolumetricFogGlobalData, "VolumetricFog")
	DECLARE_GPU_STAT (VolumetricFog)
FVector3f	VolumetricFogTemporalRandom (uint32 FrameNumber)
float	GetVolumetricFogLightSoftFading ()
void	SetupVolumetricFogIntegrationParameters (FVolumetricFogIntegrationParameters &Out, FViewInfo &View, const FVolumetricFogIntegrationParameterData &IntegrationData)
	IMPLEMENT_GLOBAL_SHADER (FVolumetricFogMaterialSetupCS, "/Engine/Private/VolumetricFog.usf", "MaterialSetupCS", SF_Compute)
	IMPLEMENT_GLOBAL_SHADER (FWriteToBoundingSphereVS, "/Engine/Private/VolumetricFog.usf", "WriteToBoundingSphereVS", SF_Vertex)
	IMPLEMENT_GLOBAL_SHADER (FInjectShadowedLocalLightPS, "/Engine/Private/VolumetricFog.usf", "InjectShadowedLocalLightPS", SF_Pixel)
const FProjectedShadowInfo *	GetShadowForInjectionIntoVolumetricFog (const FVisibleLightInfo &VisibleLightInfo)
bool	LightHasRayTracedShadows (const FLightSceneInfo *LightSceneInfo, const FSceneViewFamily &ViewFamily)
bool	LightNeedsSeparateInjectionIntoVolumetricFogForOpaqueShadow (const FViewInfo &View, const FLightSceneInfo *LightSceneInfo, const FVisibleLightInfo &VisibleLightInfo, const FScene &InScene)
FIntPoint	CalculateVolumetricFogBoundsForLight (const FSphere &LightBounds, const FViewInfo &View, FIntVector VolumetricFogGridSize, FVector GridZParams)
void	SetupInjectShadowedLocalLightPSO (FRHIVertexShader *VertexShader, FRHIGeometryShader *GeometryShader, FRHIPixelShader *PixelShader, FGraphicsPipelineStateInitializer &GraphicsPSOInit)
	IMPLEMENT_GLOBAL_SHADER_PARAMETER_STRUCT (FLumenTranslucencyLightingUniforms, "LumenGIVolumeStruct")
	IMPLEMENT_GLOBAL_SHADER (FVolumetricFogLightScatteringCS, "/Engine/Private/VolumetricFog.usf", "LightScatteringCS", SF_Compute)
	IMPLEMENT_GLOBAL_SHADER (FVolumetricFogFinalIntegrationCS, "/Engine/Private/VolumetricFog.usf", "FinalIntegrationCS", SF_Compute)
bool	DoesPlatformSupportVolumetricFogVoxelization (const FStaticShaderPlatform Platform)
bool	ShouldRenderVolumetricFog (const FScene *Scene, const FSceneViewFamily &ViewFamily)
FVector	GetVolumetricFogGridZParams (float VolumetricFogStartDistance, float NearPlane, float FarPlane, int32 GridSizeZ)
FIntVector	GetVolumetricFogResourceGridSize (const FViewInfo &View, int32 &OutVolumetricFogGridPixelSize)
FIntVector	GetVolumetricFogViewGridSize (const FViewInfo &View, int32 &OutVolumetricFogGridPixelSize)
FVector2f	GetVolumetricFogUVMaxForSampling (const FVector2f &ViewRectSize, FIntVector VolumetricFogResourceGridSize, int32 VolumetricFogResourceGridPixelSize)
FVector2f	GetVolumetricFogPrevUVMaxForTemporalBlend (const FVector2f &ViewRectSize, FIntVector VolumetricFogResourceGridSize, int32 VolumetricFogResourceGridPixelSize)
FVector2f	GetVolumetricFogFroxelToScreenSVPosRatio (const FViewInfo &View)
FRDGTextureDesc	GetVolumetricFogRDGTextureDesc (const FIntVector &VolumetricFogResourceGridSize)
void	SetupVolumetricFogGlobalData (const FViewInfo &View, FVolumetricFogGlobalData &Parameters)
void	VolumetricFogGlobalPSOCollector (const FSceneTexturesConfig &SceneTexturesConfig, int32 GlobalPSOCollectorIndex, TArray< FPSOPrecacheData > &PSOInitializers)

Variables
int32	GVolumetricFog = 1
int32	GVolumetricFogInjectShadowedLightsSeparately = 1
float	GVolumetricFogDepthDistributionScale = 32.0f
int32	GVolumetricFogGridPixelSize = 16
int32	GVolumetricFogGridSizeZ = 64
int32	GVolumetricFogTemporalReprojection = 1
int32	GVolumetricFogJitter = 1
float	GVolumetricFogHistoryWeight = .9f
int32	GVolumetricFogHistoryMissSupersampleCount = 4
float	GInverseSquaredLightDistanceBiasScale = 1.0f
int32	GVolumetricFogEmissive = 1
int32	GVolumetricFogRectLightTexture = 0
FAutoConsoleVariableRef	CVarVolumetricRectLightTexture (TEXT("r.VolumetricFog.RectLightTexture"), GVolumetricFogRectLightTexture, TEXT("Whether to allow the volumetric fog to use rect light source texture."), ECVF_RenderThreadSafe)
int32	GVolumetricFogConservativeDepth = 1
int	GVolumetricFogInjectRaytracedLights = 0
float	GLightScatteringSampleJitterMultiplier = 0
TGlobalResource< FCircleRasterizeVertexBuffer >	GCircleRasterizeVertexBuffer
TGlobalResource< FCircleRasterizeIndexBuffer >	GCircleRasterizeIndexBuffer
uint32	VolumetricFogIntegrationGroupSize = 8
FRegisterGlobalPSOCollectorFunction RegisterVolumetricFogGlobalPSOCollector &	VolumetricFogGlobalPSOCollector

Function Documentation

CalculateVolumetricFogBoundsForLight()

FIntPoint CalculateVolumetricFogBoundsForLight	(	const FSphere &	LightBounds,
		const FViewInfo &	View,
		FIntVector	VolumetricFogGridSize,
		FVector	GridZParams
	)

CVarInverseSquaredLightDistanceBiasScale()

FAutoConsoleVariableRef CVarInverseSquaredLightDistanceBiasScale	(	TEXT("r.VolumetricFog.InverseSquaredLightDistanceBiasScale")	,
		GInverseSquaredLightDistanceBiasScale	,
		TEXT("Scales the amount added to the inverse squared falloff denominator. This effectively removes the spike from inverse squared falloff that causes extreme aliasing.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarLightScatteringSampleJitterMultiplier()

FAutoConsoleVariableRef CVarLightScatteringSampleJitterMultiplier	(	TEXT("r.VolumetricFog.LightScatteringSampleJitterMultiplier")	,
		GLightScatteringSampleJitterMultiplier	,
		TEXT("Multiplier for random offset value used to jitter each world sample position when generating the 3D fog volume. Enable/disable with r.VolumetricFog.Jitter")	,
		ECVF_RenderThreadSafe|	ECVF_Scalability
	)

CVarVolumetricFog()

FAutoConsoleVariableRef CVarVolumetricFog	(	TEXT("r.VolumetricFog")	,
		GVolumetricFog	,
		TEXT("Whether to allow the volumetric fog feature.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarVolumetricFogConservativeDepth()

FAutoConsoleVariableRef CVarVolumetricFogConservativeDepth	(	TEXT("r.VolumetricFog.ConservativeDepth")	,
		GVolumetricFogConservativeDepth	,
		TEXT("[Experimental] Whether to allow the volumetric to use conservative depth to accelerate computations.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarVolumetricFogDepthDistributionScale()

FAutoConsoleVariableRef CVarVolumetricFogDepthDistributionScale	(	TEXT("r.VolumetricFog.DepthDistributionScale")	,
		GVolumetricFogDepthDistributionScale	,
		TEXT("Scales the slice depth distribution.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarVolumetricFogEmissive()

FAutoConsoleVariableRef CVarVolumetricFogEmissive	(	TEXT("r.VolumetricFog.Emissive")	,
		GVolumetricFogEmissive	,
		TEXT("Whether to allow the volumetric fog emissive component.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarVolumetricFogGridPixelSize()

FAutoConsoleVariableRef CVarVolumetricFogGridPixelSize	(	TEXT("r.VolumetricFog.GridPixelSize")	,
		GVolumetricFogGridPixelSize	,
		TEXT("XY Size of a cell in the voxel grid, in pixels.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarVolumetricFogGridSizeZ()

FAutoConsoleVariableRef CVarVolumetricFogGridSizeZ	(	TEXT("r.VolumetricFog.GridSizeZ")	,
		GVolumetricFogGridSizeZ	,
		TEXT("How many Volumetric Fog cells to use in z.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarVolumetricFogHistoryMissSupersampleCount()

FAutoConsoleVariableRef CVarVolumetricFogHistoryMissSupersampleCount	(	TEXT("r.VolumetricFog.HistoryMissSupersampleCount")	,
		GVolumetricFogHistoryMissSupersampleCount	,
		TEXT("This reduces noise when panning or on camera cuts, but introduces a variable cost to volumetric fog computation. Valid range [1, 16].")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarVolumetricFogHistoryWeight()

FAutoConsoleVariableRef CVarVolumetricFogHistoryWeight	(	TEXT("r.VolumetricFog.HistoryWeight")	,
		GVolumetricFogHistoryWeight	,
		TEXT("How much the history value should be weighted each frame. This is a tradeoff between visible jittering and responsiveness.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarVolumetricFogInjectShadowedLightsSeparately()

FAutoConsoleVariableRef CVarVolumetricFogInjectShadowedLightsSeparately	(	TEXT("r.VolumetricFog.InjectShadowedLightsSeparately")	,
		GVolumetricFogInjectShadowedLightsSeparately	,
		TEXT("Whether to allow the volumetric fog feature.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarVolumetricFogJitter()

FAutoConsoleVariableRef CVarVolumetricFogJitter	(	TEXT("r.VolumetricFog.Jitter")	,
		GVolumetricFogJitter	,
		TEXT("Whether to apply jitter to each frame's volumetric fog computation, achieving temporal super sampling.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarVolumetricFogTemporalReprojection()

FAutoConsoleVariableRef CVarVolumetricFogTemporalReprojection	(	TEXT("r.VolumetricFog.TemporalReprojection")	,
		GVolumetricFogTemporalReprojection	,
		TEXT("Whether to use temporal reprojection on volumetric fog.")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

CVarVolumetricInjectRaytracedLights()

FAutoConsoleVariableRef CVarVolumetricInjectRaytracedLights	(	TEXT("r.VolumetricFog.InjectRaytracedLights")	,
		GVolumetricFogInjectRaytracedLights	,
		TEXT("Whether lights with ray traced shadows are injected into volumetric fog")	,
		ECVF_Scalability|	ECVF_RenderThreadSafe
	)

DECLARE_GPU_STAT()

DECLARE_GPU_STAT

(

VolumetricFog

)

DoesPlatformSupportVolumetricFogVoxelization()

bool DoesPlatformSupportVolumetricFogVoxelization

(

const FStaticShaderPlatform

Platform

)

GetShadowForInjectionIntoVolumetricFog()

const FProjectedShadowInfo * GetShadowForInjectionIntoVolumetricFog

(

const FVisibleLightInfo &

VisibleLightInfo

)

GetVolumetricFogFroxelToScreenSVPosRatio()

FVector2f GetVolumetricFogFroxelToScreenSVPosRatio

(

const FViewInfo &

View

)

GetVolumetricFogGridPixelSize()

int32 GetVolumetricFogGridPixelSize

(

)

GetVolumetricFogGridZParams()

FVector GetVolumetricFogGridZParams	(	float	VolumetricFogStartDistance,
		float	NearPlane,
		float	FarPlane,
		int32	GridSizeZ
	)

GetVolumetricFogLightSoftFading()

float GetVolumetricFogLightSoftFading

(

)

GetVolumetricFogPrevUVMaxForTemporalBlend()

FVector2f GetVolumetricFogPrevUVMaxForTemporalBlend	(	const FVector2f &	ViewRectSize,
		FIntVector	VolumetricFogResourceGridSize,
		int32	VolumetricFogResourceGridPixelSize
	)

GetVolumetricFogRDGTextureDesc()

FRDGTextureDesc GetVolumetricFogRDGTextureDesc

(

const FIntVector &

VolumetricFogResourceGridSize

)

GetVolumetricFogResourceGridSize()

FIntVector GetVolumetricFogResourceGridSize	(	const FViewInfo &	View,
		int32 &	OutVolumetricFogGridPixelSize
	)

GetVolumetricFogUVMaxForSampling()

FVector2f GetVolumetricFogUVMaxForSampling	(	const FVector2f &	ViewRectSize,
		FIntVector	VolumetricFogResourceGridSize,
		int32	VolumetricFogResourceGridPixelSize
	)

GetVolumetricFogViewGridSize()

FIntVector GetVolumetricFogViewGridSize	(	const FViewInfo &	View,
		int32 &	OutVolumetricFogGridPixelSize
	)

IMPLEMENT_GLOBAL_SHADER() [1/5]

IMPLEMENT_GLOBAL_SHADER	(	FInjectShadowedLocalLightPS	,
		"/Engine/Private/VolumetricFog.usf"	,
		"InjectShadowedLocalLightPS"	,
		SF_Pixel
	)

IMPLEMENT_GLOBAL_SHADER() [2/5]

IMPLEMENT_GLOBAL_SHADER	(	FVolumetricFogFinalIntegrationCS	,
		"/Engine/Private/VolumetricFog.usf"	,
		"FinalIntegrationCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [3/5]

IMPLEMENT_GLOBAL_SHADER	(	FVolumetricFogLightScatteringCS	,
		"/Engine/Private/VolumetricFog.usf"	,
		"LightScatteringCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [4/5]

IMPLEMENT_GLOBAL_SHADER	(	FVolumetricFogMaterialSetupCS	,
		"/Engine/Private/VolumetricFog.usf"	,
		"MaterialSetupCS"	,
		SF_Compute
	)

IMPLEMENT_GLOBAL_SHADER() [5/5]

IMPLEMENT_GLOBAL_SHADER	(	FWriteToBoundingSphereVS	,
		"/Engine/Private/VolumetricFog.usf"	,
		"WriteToBoundingSphereVS"	,
		SF_Vertex
	)

IMPLEMENT_GLOBAL_SHADER_PARAMETER_STRUCT() [1/2]

IMPLEMENT_GLOBAL_SHADER_PARAMETER_STRUCT	(	FLumenTranslucencyLightingUniforms	,
		"LumenGIVolumeStruct"
	)

IMPLEMENT_GLOBAL_SHADER_PARAMETER_STRUCT() [2/2]

IMPLEMENT_GLOBAL_SHADER_PARAMETER_STRUCT	(	FVolumetricFogGlobalData	,
		"VolumetricFog"
	)

LightHasRayTracedShadows()

bool LightHasRayTracedShadows	(	const FLightSceneInfo *	LightSceneInfo,
		const FSceneViewFamily &	ViewFamily
	)

LightNeedsSeparateInjectionIntoVolumetricFogForOpaqueShadow()

bool LightNeedsSeparateInjectionIntoVolumetricFogForOpaqueShadow	(	const FViewInfo &	View,
		const FLightSceneInfo *	LightSceneInfo,
		const FVisibleLightInfo &	VisibleLightInfo,
		const FScene &	InScene
	)

SetupInjectShadowedLocalLightPSO()

void SetupInjectShadowedLocalLightPSO	(	FRHIVertexShader *	VertexShader,
		FRHIGeometryShader *	GeometryShader,
		FRHIPixelShader *	PixelShader,
		FGraphicsPipelineStateInitializer &	GraphicsPSOInit
	)

SetupVolumetricFogGlobalData()

void SetupVolumetricFogGlobalData	(	const FViewInfo &	View,
		FVolumetricFogGlobalData &	Parameters
	)

SetupVolumetricFogIntegrationParameters()

void SetupVolumetricFogIntegrationParameters	(	FVolumetricFogIntegrationParameters &	Out,
		FViewInfo &	View,
		const FVolumetricFogIntegrationParameterData &	IntegrationData
	)

ShouldRenderVolumetricFog()

bool ShouldRenderVolumetricFog	(	const FScene *	Scene,
		const FSceneViewFamily &	ViewFamily
	)

VolumetricFogGlobalPSOCollector()

void VolumetricFogGlobalPSOCollector	(	const FSceneTexturesConfig &	SceneTexturesConfig,
		int32	GlobalPSOCollectorIndex,
		TArray< FPSOPrecacheData > &	PSOInitializers
	)

VolumetricFogTemporalRandom()

FVector3f VolumetricFogTemporalRandom

(

uint32

FrameNumber

)

Variable Documentation

CVarVolumetricRectLightTexture

FAutoConsoleVariableRef CVarVolumetricRectLightTexture(TEXT("r.VolumetricFog.RectLightTexture"), GVolumetricFogRectLightTexture, TEXT("Whether to allow the volumetric fog to use rect light source texture."), ECVF_RenderThreadSafe)	(	TEXT("r.VolumetricFog.RectLightTexture")	,
		GVolumetricFogRectLightTexture	,
		TEXT("Whether to allow the volumetric fog to use rect light source texture.")	,
		ECVF_RenderThreadSafe
	)

GCircleRasterizeIndexBuffer

TGlobalResource<FCircleRasterizeIndexBuffer> GCircleRasterizeIndexBuffer

GCircleRasterizeVertexBuffer

TGlobalResource<FCircleRasterizeVertexBuffer> GCircleRasterizeVertexBuffer

GInverseSquaredLightDistanceBiasScale

float GInverseSquaredLightDistanceBiasScale = 1.0f

GLightScatteringSampleJitterMultiplier

float GLightScatteringSampleJitterMultiplier = 0

GVolumetricFog

int32 GVolumetricFog = 1

GVolumetricFogConservativeDepth

int32 GVolumetricFogConservativeDepth = 1

GVolumetricFogDepthDistributionScale

float GVolumetricFogDepthDistributionScale = 32.0f

GVolumetricFogEmissive

int32 GVolumetricFogEmissive = 1

GVolumetricFogGridPixelSize

int32 GVolumetricFogGridPixelSize = 16

GVolumetricFogGridSizeZ

int32 GVolumetricFogGridSizeZ = 64

GVolumetricFogHistoryMissSupersampleCount

int32 GVolumetricFogHistoryMissSupersampleCount = 4

GVolumetricFogHistoryWeight

float GVolumetricFogHistoryWeight = .9f

GVolumetricFogInjectRaytracedLights

int GVolumetricFogInjectRaytracedLights = 0

GVolumetricFogInjectShadowedLightsSeparately

int32 GVolumetricFogInjectShadowedLightsSeparately = 1

GVolumetricFogJitter

int32 GVolumetricFogJitter = 1

GVolumetricFogRectLightTexture

int32 GVolumetricFogRectLightTexture = 0

GVolumetricFogTemporalReprojection

int32 GVolumetricFogTemporalReprojection = 1

VolumetricFogGlobalPSOCollector

FRegisterGlobalPSOCollectorFunction RegisterVolumetricFogGlobalPSOCollector& VolumetricFogGlobalPSOCollector

VolumetricFogIntegrationGroupSize

uint32 VolumetricFogIntegrationGroupSize = 8