#include "LumenReflections.h"
#include "RendererPrivate.h"
#include "ScenePrivate.h"
#include "SceneUtils.h"
#include "PipelineStateCache.h"
#include "ShaderParameterStruct.h"
#include "PixelShaderUtils.h"
#include "ReflectionEnvironment.h"
#include "DistanceFieldAmbientOcclusion.h"
#include "SingleLayerWaterRendering.h"
#include "LumenTracingUtils.h"
#include "LumenFrontLayerTranslucency.h"
#include "RayTracedTranslucency.h"
#include "FirstPersonSceneExtension.h"
#include "LumenScreenProbeGather.h"
#include "StochasticLighting/StochasticLighting.h"

Classes
class	FInitReflectionIndirectArgsCS

class	FReflectionTileClassificationBuildListsCS

class	FReflectionClearNeighborTileCS

class	FReflectionGenerateRaysCS

class	FReflectionClearUnusedTraceTileDataCS

class	FLumenReflectionResolveCS

class	FLumenReflectionDenoiserTemporalCS

class	FLumenReflectionDenoiserClearCS

class	FLumenReflectionDenoiserSpatialCS

Namespaces
namespace	LumenReflections

Functions
FAutoConsoleVariableRef	GVarLumenReflectionTraceMeshSDFs (TEXT("r.Lumen.Reflections.TraceMeshSDFs"), GLumenReflectionTraceMeshSDFs, TEXT(""), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	CVarLumenReflectionRadianceCacheReprojectionRadiusScale (TEXT("r.Lumen.Reflections.RadianceCache.ReprojectionRadiusScale"), GLumenReflectionRadianceCacheReprojectionRadiusScale, TEXT("Scales the radius of the sphere around each Radiance Cache probe that is intersected for parallax correction when interpolating from the Radiance Cache."), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	GVarLumenReflectionRoughnessFadeLength (TEXT("r.Lumen.Reflections.RoughnessFadeLength"), GLumenReflectionRoughnessFadeLength, TEXT(""), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	GVarLumenReflectionGGXSamplingBias (TEXT("r.Lumen.Reflections.GGXSamplingBias"), GLumenReflectionGGXSamplingBias, TEXT(""), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	CVarLumenReflectionTemporalFilter (TEXT("r.Lumen.Reflections.Temporal"), GLumenReflectionTemporalFilter, TEXT("Whether to use a temporal filter"), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	CVarLumenReflectionHistoryDistanceThreshold (TEXT("r.Lumen.Reflections.Temporal.DistanceThreshold"), GLumenReflectionHistoryDistanceThreshold, TEXT("World space distance threshold needed to discard last frame's lighting results. Lower values reduce ghosting from characters when near a wall but increase flickering artifacts."), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	GVarLumenReflectionSmoothBias (TEXT("r.Lumen.Reflections.SmoothBias"), GLumenReflectionSmoothBias, TEXT("Values larger than 0 apply a global material roughness bias for Lumen Reflections, where 1 is fully mirror."), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	CVarLumenReflectionScreenSpaceReconstruction (TEXT("r.Lumen.Reflections.ScreenSpaceReconstruction"), GLumenReflectionScreenSpaceReconstruction, TEXT("Whether to use the screen space BRDF reweighting reconstruction"), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	CVarLumenReflectionScreenSpaceReconstructionNumSamples (TEXT("r.Lumen.Reflections.ScreenSpaceReconstruction.NumSamples"), GLumenReflectionScreenSpaceReconstructionNumSamples, TEXT("Number of samples to use for the screen space BRDF reweighting reconstruction"), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	CVarLumenReflectionScreenSpaceReconstructionRoughnessScale (TEXT("r.Lumen.Reflections.ScreenSpaceReconstruction.RoughnessScale"), GLumenReflectionScreenSpaceReconstructionRoughnessScale, TEXT("Values higher than 1 allow neighbor traces to be blurred together more aggressively, but is not physically correct."), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	CVarLumenReflectionBilateralFilter (TEXT("r.Lumen.Reflections.BilateralFilter"), GLumenReflectionBilateralFilter, TEXT("Whether to do a bilateral filter as a last step in denoising Lumen Reflections."), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	CVarLumenReflectionBilateralFilterNumSamples (TEXT("r.Lumen.Reflections.BilateralFilter.NumSamples"), GLumenReflectionBilateralFilterNumSamples, TEXT("Number of bilateral filter samples."), ECVF_Scalability\|ECVF_RenderThreadSafe)

FAutoConsoleVariableRef	CVarLumenReflectionBilateralFilterDepthWeightScale (TEXT("r.Lumen.Reflections.BilateralFilter.DepthWeightScale"), GLumenReflectionBilateralFilterDepthWeightScale, TEXT("Scales the depth weight of the bilateral filter"), ECVF_Scalability\|ECVF_RenderThreadSafe)

float	GetLumenReflectionSpecularScale ()

float	GetLumenReflectionContrast ()

int32	LumenReflections::GetMaxFramesAccumulated ()

void	LumenReflections::ModifyCompilationEnvironment (const FGlobalShaderPermutationParameters &Parameters, FShaderCompilerEnvironment &OutEnvironment)

float	LumenReflections::GetDenoiserOneOverTonemapRange ()

FRDGBufferRef	SetupVisualizeReflectionTraces (FRDGBuilder &GraphBuilder, FLumenReflectionsVisualizeTracesParameters &VisualizeTracesParameters)

void	GetReflectionsVisualizeTracesBuffer (TRefCountPtr< FRDGPooledBuffer > &VisualizeTracesData)

	IMPLEMENT_GLOBAL_SHADER (FInitReflectionIndirectArgsCS, "/Engine/Private/Lumen/LumenReflections.usf", "InitReflectionIndirectArgsCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FReflectionTileClassificationBuildListsCS, "/Engine/Private/Lumen/LumenReflections.usf", "ReflectionTileClassificationBuildListsCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FReflectionClearNeighborTileCS, "/Engine/Private/Lumen/LumenReflections.usf", "ReflectionClearNeighborTileCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FReflectionGenerateRaysCS, "/Engine/Private/Lumen/LumenReflections.usf", "ReflectionGenerateRaysCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FReflectionClearUnusedTraceTileDataCS, "/Engine/Private/Lumen/LumenReflections.usf", "ReflectionClearUnusedTraceTileDataCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FLumenReflectionResolveCS, "/Engine/Private/Lumen/LumenReflectionResolve.usf", "LumenReflectionResolveCS", SF_Compute)

bool	ShouldRenderLumenReflections (const FSceneView &View, bool bSkipTracingDataCheck, bool bSkipProjectCheck, bool bIncludeStandalone)

FLumenReflectionTileParameters	ReflectionTileClassification (FRDGBuilder &GraphBuilder, const FViewInfo &View, const FMinimalSceneTextures &SceneTextures, const FLumenSceneFrameTemporaries &FrameTemporaries, const FLumenReflectionTracingParameters &ReflectionTracingParameters, const FLumenFrontLayerTranslucencyGBufferParameters &FrontLayerTranslucencyGBuffer, ERDGPassFlags ComputePassFlags)

	IMPLEMENT_GLOBAL_SHADER (FLumenReflectionDenoiserTemporalCS, "/Engine/Private/Lumen/LumenReflectionDenoiserTemporal.usf", "LumenReflectionDenoiserTemporalCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FLumenReflectionDenoiserClearCS, "/Engine/Private/Lumen/LumenReflectionDenoiserClear.usf", "LumenReflectionDenoiserClearCS", SF_Compute)

	IMPLEMENT_GLOBAL_SHADER (FLumenReflectionDenoiserSpatialCS, "/Engine/Private/Lumen/LumenReflectionDenoiserSpatial.usf", "LumenReflectionDenoiserSpatialCS", SF_Compute)

	DECLARE_GPU_STAT (LumenReflections)

	DECLARE_GPU_STAT (RayTracedTranslucency)

Variables
FLumenGatherCvarState	GLumenGatherCvars

int32	GLumenReflectionTraceMeshSDFs = 1

float	GLumenReflectionRadianceCacheReprojectionRadiusScale = 10.0f

TAutoConsoleVariable< float >	CVarLumenReflectionMaxRoughnessToTrace (TEXT("r.Lumen.Reflections.MaxRoughnessToTrace"), -1.0f, TEXT("Max roughness value for which Lumen still traces dedicated reflection rays. Overrides Post Process Volume settings when set to anything >= 0."), ECVF_RenderThreadSafe)

TAutoConsoleVariable< float >	CVarLumenReflectionMaxRoughnessToTraceClamp (TEXT("r.Lumen.Reflections.MaxRoughnessToTraceClamp"), 1.0f, TEXT("Scalability clamp for max roughness value for which Lumen still traces dedicated reflection rays. Project and Post Process Volumes settings are clamped to this value. Useful for scalability."), ECVF_Scalability\|ECVF_RenderThreadSafe)

TAutoConsoleVariable< float >	CVarLumenReflectionsMaxRoughnessToTraceForFoliage (TEXT("r.Lumen.Reflections.MaxRoughnessToTraceForFoliage"), 0.2f, TEXT("Max roughness value for which Lumen still traces dedicated reflection rays from foliage pixels. Where foliage pixel is a pixel with two sided or subsurface shading model."), ECVF_Scalability\|ECVF_RenderThreadSafe)

float	GLumenReflectionRoughnessFadeLength = .1f

float	GLumenReflectionGGXSamplingBias = .1f

int32	GLumenReflectionTemporalFilter = 1

TAutoConsoleVariable< int32 >	CVarLumenReflectionTemporalMaxRayDirections (TEXT("r.Lumen.Reflections.Temporal.MaxRayDirections"), 1024, TEXT("Number of possible random directions per pixel."), ECVF_Scalability\|ECVF_RenderThreadSafe)

float	GLumenReflectionHistoryDistanceThreshold = .03f

TAutoConsoleVariable< int32 >	CVarLumenReflectionMaxRayIntensity (TEXT("r.Lumen.Reflections.MaxRayIntensity"), 40.0f, TEXT("Clamps the maximum ray lighting intensity (with PreExposure) to reduce fireflies."), ECVF_Scalability\|ECVF_RenderThreadSafe)

float	GLumenReflectionSmoothBias = 0.0f

int32	GLumenReflectionScreenSpaceReconstruction = 1

int32	GLumenReflectionScreenSpaceReconstructionNumSamples = 5

float	GLumenReflectionScreenSpaceReconstructionRoughnessScale = 1.0f

int32	GLumenReflectionBilateralFilter = 1

int32	GLumenReflectionBilateralFilterNumSamples = 4

float	GLumenReflectionBilateralFilterDepthWeightScale = 10000.0f

int32	GLumenReflectionsVisualizeTracingCoherency = 0

FAutoConsoleVariableRef	GVarLumenReflectionsVisualizeTracingCoherency (TEXT("r.Lumen.Reflections.VisualizeTracingCoherency"), GLumenReflectionsVisualizeTracingCoherency, TEXT("Set to 1 to capture traces from a random wavefront and draw them on the screen. Set to 1 again to re-capture. Shaders must enable support first, see DEBUG_SUPPORT_VISUALIZE_TRACE_COHERENCY"), ECVF_RenderThreadSafe)

float	GLumenReflectionsSpecularScale = 1.f

FAutoConsoleVariableRef	GVarLumenReflectionsSpecularScale (TEXT("r.Lumen.Reflections.SpecularScale"), GLumenReflectionsSpecularScale, TEXT("Non-physically correct Lumen specular reflection scale. Recommended to keep at 1."), ECVF_RenderThreadSafe)

float	GLumenReflectionsContrast = 1.f

FAutoConsoleVariableRef	GVarLumenReflectionsContrast (TEXT("r.Lumen.Reflections.Contrast"), GLumenReflectionsContrast, TEXT("Non-physically correct Lumen reflection contrast. Recommended to keep at 1."), ECVF_RenderThreadSafe)

TAutoConsoleVariable< int32 >	CVarRayTracedTranslucencyMaxRayIntensity (TEXT("r.RayTracedTranslucency.MaxRayIntensity"), 1000.0f, TEXT("Clamps the maximum ray lighting intensity (with PreExposure) to reduce fireflies for raytraced translucency surfaces."), ECVF_Scalability\|ECVF_RenderThreadSafe)

TRefCountPtr< FRDGPooledBuffer >	GVisualizeReflectionTracesData

const int32	GReflectionResolveTileSize = 8

Function Documentation

◆ CVarLumenReflectionBilateralFilter()

FAutoConsoleVariableRef CVarLumenReflectionBilateralFilter	(	TEXT("r.Lumen.Reflections.BilateralFilter")	,
		GLumenReflectionBilateralFilter	,
		TEXT("Whether to do a bilateral filter as a last step in denoising Lumen Reflections.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionBilateralFilterDepthWeightScale()

FAutoConsoleVariableRef CVarLumenReflectionBilateralFilterDepthWeightScale	(	TEXT("r.Lumen.Reflections.BilateralFilter.DepthWeightScale")	,
		GLumenReflectionBilateralFilterDepthWeightScale	,
		TEXT("Scales the depth weight of the bilateral filter")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionBilateralFilterNumSamples()

FAutoConsoleVariableRef CVarLumenReflectionBilateralFilterNumSamples	(	TEXT("r.Lumen.Reflections.BilateralFilter.NumSamples")	,
		GLumenReflectionBilateralFilterNumSamples	,
		TEXT("Number of bilateral filter samples.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionHistoryDistanceThreshold()

FAutoConsoleVariableRef CVarLumenReflectionHistoryDistanceThreshold	(	TEXT("r.Lumen.Reflections.Temporal.DistanceThreshold")	,
		GLumenReflectionHistoryDistanceThreshold	,
		TEXT("World space distance threshold needed to discard last frame's lighting results. Lower values reduce ghosting from characters when near a wall but increase flickering artifacts.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionRadianceCacheReprojectionRadiusScale()

FAutoConsoleVariableRef CVarLumenReflectionRadianceCacheReprojectionRadiusScale	(	TEXT("r.Lumen.Reflections.RadianceCache.ReprojectionRadiusScale")	,
		GLumenReflectionRadianceCacheReprojectionRadiusScale	,
		TEXT("Scales the radius of the sphere around each Radiance Cache probe that is intersected for parallax correction when interpolating from the Radiance Cache.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionScreenSpaceReconstruction()

FAutoConsoleVariableRef CVarLumenReflectionScreenSpaceReconstruction	(	TEXT("r.Lumen.Reflections.ScreenSpaceReconstruction")	,
		GLumenReflectionScreenSpaceReconstruction	,
		TEXT("Whether to use the screen space BRDF reweighting reconstruction")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionScreenSpaceReconstructionNumSamples()

FAutoConsoleVariableRef CVarLumenReflectionScreenSpaceReconstructionNumSamples	(	TEXT("r.Lumen.Reflections.ScreenSpaceReconstruction.NumSamples")	,
		GLumenReflectionScreenSpaceReconstructionNumSamples	,
		TEXT("Number of samples to use for the screen space BRDF reweighting reconstruction")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionScreenSpaceReconstructionRoughnessScale()

FAutoConsoleVariableRef CVarLumenReflectionScreenSpaceReconstructionRoughnessScale	(	TEXT("r.Lumen.Reflections.ScreenSpaceReconstruction.RoughnessScale")	,
		GLumenReflectionScreenSpaceReconstructionRoughnessScale	,
		TEXT("Values higher than 1 allow neighbor traces to be blurred together more aggressively, but is not physically correct.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionTemporalFilter()

FAutoConsoleVariableRef CVarLumenReflectionTemporalFilter	(	TEXT("r.Lumen.Reflections.Temporal")	,
		GLumenReflectionTemporalFilter	,
		TEXT("Whether to use a temporal filter")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ DECLARE_GPU_STAT() [1/2]

DECLARE_GPU_STAT ( LumenReflections )

◆ DECLARE_GPU_STAT() [2/2]

DECLARE_GPU_STAT ( RayTracedTranslucency )

◆ GetLumenReflectionContrast()

float GetLumenReflectionContrast ( )

◆ GetLumenReflectionSpecularScale()

float GetLumenReflectionSpecularScale ( )

◆ GetReflectionsVisualizeTracesBuffer()

void GetReflectionsVisualizeTracesBuffer ( TRefCountPtr< FRDGPooledBuffer > & VisualizeTracesData )

◆ GVarLumenReflectionGGXSamplingBias()

FAutoConsoleVariableRef GVarLumenReflectionGGXSamplingBias	(	TEXT("r.Lumen.Reflections.GGXSamplingBias")	,
		GLumenReflectionGGXSamplingBias	,
		TEXT("")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ GVarLumenReflectionRoughnessFadeLength()

FAutoConsoleVariableRef GVarLumenReflectionRoughnessFadeLength	(	TEXT("r.Lumen.Reflections.RoughnessFadeLength")	,
		GLumenReflectionRoughnessFadeLength	,
		TEXT("")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ GVarLumenReflectionSmoothBias()

FAutoConsoleVariableRef GVarLumenReflectionSmoothBias	(	TEXT("r.Lumen.Reflections.SmoothBias")	,
		GLumenReflectionSmoothBias	,
		TEXT("Values larger than 0 apply a global material roughness bias for Lumen Reflections, where 1 is fully mirror.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ GVarLumenReflectionTraceMeshSDFs()

FAutoConsoleVariableRef GVarLumenReflectionTraceMeshSDFs	(	TEXT("r.Lumen.Reflections.TraceMeshSDFs")	,
		GLumenReflectionTraceMeshSDFs	,
		TEXT("")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ IMPLEMENT_GLOBAL_SHADER() [1/9]

IMPLEMENT_GLOBAL_SHADER	(	FInitReflectionIndirectArgsCS	,
		"/Engine/Private/Lumen/LumenReflections.usf"	,
		"InitReflectionIndirectArgsCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [2/9]

IMPLEMENT_GLOBAL_SHADER	(	FLumenReflectionDenoiserClearCS	,
		"/Engine/Private/Lumen/LumenReflectionDenoiserClear.usf"	,
		"LumenReflectionDenoiserClearCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [3/9]

IMPLEMENT_GLOBAL_SHADER	(	FLumenReflectionDenoiserSpatialCS	,
		"/Engine/Private/Lumen/LumenReflectionDenoiserSpatial.usf"	,
		"LumenReflectionDenoiserSpatialCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [4/9]

IMPLEMENT_GLOBAL_SHADER	(	FLumenReflectionDenoiserTemporalCS	,
		"/Engine/Private/Lumen/LumenReflectionDenoiserTemporal.usf"	,
		"LumenReflectionDenoiserTemporalCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [5/9]

IMPLEMENT_GLOBAL_SHADER	(	FLumenReflectionResolveCS	,
		"/Engine/Private/Lumen/LumenReflectionResolve.usf"	,
		"LumenReflectionResolveCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [6/9]

IMPLEMENT_GLOBAL_SHADER	(	FReflectionClearNeighborTileCS	,
		"/Engine/Private/Lumen/LumenReflections.usf"	,
		"ReflectionClearNeighborTileCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [7/9]

IMPLEMENT_GLOBAL_SHADER	(	FReflectionClearUnusedTraceTileDataCS	,
		"/Engine/Private/Lumen/LumenReflections.usf"	,
		"ReflectionClearUnusedTraceTileDataCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [8/9]

IMPLEMENT_GLOBAL_SHADER	(	FReflectionGenerateRaysCS	,
		"/Engine/Private/Lumen/LumenReflections.usf"	,
		"ReflectionGenerateRaysCS"	,
		SF_Compute
	)

◆ IMPLEMENT_GLOBAL_SHADER() [9/9]

IMPLEMENT_GLOBAL_SHADER	(	FReflectionTileClassificationBuildListsCS	,
		"/Engine/Private/Lumen/LumenReflections.usf"	,
		"ReflectionTileClassificationBuildListsCS"	,
		SF_Compute
	)

◆ ReflectionTileClassification()

FLumenReflectionTileParameters ReflectionTileClassification	(	FRDGBuilder &	GraphBuilder,
		const FViewInfo &	View,
		const FMinimalSceneTextures &	SceneTextures,
		const FLumenSceneFrameTemporaries &	FrameTemporaries,
		const FLumenReflectionTracingParameters &	ReflectionTracingParameters,
		const FLumenFrontLayerTranslucencyGBufferParameters &	FrontLayerTranslucencyGBuffer,
		ERDGPassFlags	ComputePassFlags
	)

◆ SetupVisualizeReflectionTraces()

FRDGBufferRef SetupVisualizeReflectionTraces	(	FRDGBuilder &	GraphBuilder,
		FLumenReflectionsVisualizeTracesParameters &	VisualizeTracesParameters
	)

◆ ShouldRenderLumenReflections()

bool ShouldRenderLumenReflections	(	const FSceneView &	View,
		bool	bSkipTracingDataCheck,
		bool	bSkipProjectCheck,
		bool	bIncludeStandalone
	)

Variable Documentation

◆ CVarLumenReflectionMaxRayIntensity

TAutoConsoleVariable< int32 > CVarLumenReflectionMaxRayIntensity(TEXT("r.Lumen.Reflections.MaxRayIntensity"), 40.0f, TEXT("Clamps the maximum ray lighting intensity (with PreExposure) to reduce fireflies."), ECVF_Scalability\|ECVF_RenderThreadSafe)	(	TEXT("r.Lumen.Reflections.MaxRayIntensity")	,
		40.	0f,
		TEXT("Clamps the maximum ray lighting intensity (with PreExposure) to reduce fireflies.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionMaxRoughnessToTrace

TAutoConsoleVariable< float > CVarLumenReflectionMaxRoughnessToTrace(TEXT("r.Lumen.Reflections.MaxRoughnessToTrace"), -1.0f, TEXT("Max roughness value for which Lumen still traces dedicated reflection rays. Overrides Post Process Volume settings when set to anything >= 0."), ECVF_RenderThreadSafe)	(	TEXT("r.Lumen.Reflections.MaxRoughnessToTrace")	,
		-1.	0f,
		TEXT("Max roughness value for which Lumen still traces dedicated reflection rays. Overrides Post Process Volume settings when set to anything >= 0.")	,
		ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionMaxRoughnessToTraceClamp

TAutoConsoleVariable< float > CVarLumenReflectionMaxRoughnessToTraceClamp(TEXT("r.Lumen.Reflections.MaxRoughnessToTraceClamp"), 1.0f, TEXT("Scalability clamp for max roughness value for which Lumen still traces dedicated reflection rays. Project and Post Process Volumes settings are clamped to this value. Useful for scalability."), ECVF_Scalability\|ECVF_RenderThreadSafe)	(	TEXT("r.Lumen.Reflections.MaxRoughnessToTraceClamp")	,
		1.	0f,
		TEXT("Scalability clamp for max roughness value for which Lumen still traces dedicated reflection rays. Project and Post Process Volumes settings are clamped to this value. Useful for scalability.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionsMaxRoughnessToTraceForFoliage

TAutoConsoleVariable< float > CVarLumenReflectionsMaxRoughnessToTraceForFoliage(TEXT("r.Lumen.Reflections.MaxRoughnessToTraceForFoliage"), 0.2f, TEXT("Max roughness value for which Lumen still traces dedicated reflection rays from foliage pixels. Where foliage pixel is a pixel with two sided or subsurface shading model."), ECVF_Scalability\|ECVF_RenderThreadSafe)	(	TEXT("r.Lumen.Reflections.MaxRoughnessToTraceForFoliage")	,
		0.	2f,
		TEXT("Max roughness value for which Lumen still traces dedicated reflection rays from foliage pixels. Where foliage pixel is a pixel with two sided or subsurface shading model.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarLumenReflectionTemporalMaxRayDirections

TAutoConsoleVariable< int32 > CVarLumenReflectionTemporalMaxRayDirections(TEXT("r.Lumen.Reflections.Temporal.MaxRayDirections"), 1024, TEXT("Number of possible random directions per pixel."), ECVF_Scalability\|ECVF_RenderThreadSafe)	(	TEXT("r.Lumen.Reflections.Temporal.MaxRayDirections")	,
		1024	,
		TEXT("Number of possible random directions per pixel.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ CVarRayTracedTranslucencyMaxRayIntensity

TAutoConsoleVariable< int32 > CVarRayTracedTranslucencyMaxRayIntensity(TEXT("r.RayTracedTranslucency.MaxRayIntensity"), 1000.0f, TEXT("Clamps the maximum ray lighting intensity (with PreExposure) to reduce fireflies for raytraced translucency surfaces."), ECVF_Scalability\|ECVF_RenderThreadSafe)	(	TEXT("r.RayTracedTranslucency.MaxRayIntensity")	,
		1000.	0f,
		TEXT("Clamps the maximum ray lighting intensity (with PreExposure) to reduce fireflies for raytraced translucency surfaces.")	,
		ECVF_Scalability\|	ECVF_RenderThreadSafe
	)

◆ GLumenGatherCvars

FLumenGatherCvarState GLumenGatherCvars

extern

◆ GLumenReflectionBilateralFilter

int32 GLumenReflectionBilateralFilter = 1

◆ GLumenReflectionBilateralFilterDepthWeightScale

float GLumenReflectionBilateralFilterDepthWeightScale = 10000.0f

◆ GLumenReflectionBilateralFilterNumSamples

int32 GLumenReflectionBilateralFilterNumSamples = 4

◆ GLumenReflectionGGXSamplingBias

float GLumenReflectionGGXSamplingBias = .1f

◆ GLumenReflectionHistoryDistanceThreshold

float GLumenReflectionHistoryDistanceThreshold = .03f

◆ GLumenReflectionRadianceCacheReprojectionRadiusScale

float GLumenReflectionRadianceCacheReprojectionRadiusScale = 10.0f

◆ GLumenReflectionRoughnessFadeLength

float GLumenReflectionRoughnessFadeLength = .1f

◆ GLumenReflectionsContrast

float GLumenReflectionsContrast = 1.f

◆ GLumenReflectionScreenSpaceReconstruction

int32 GLumenReflectionScreenSpaceReconstruction = 1

◆ GLumenReflectionScreenSpaceReconstructionNumSamples

int32 GLumenReflectionScreenSpaceReconstructionNumSamples = 5

◆ GLumenReflectionScreenSpaceReconstructionRoughnessScale

float GLumenReflectionScreenSpaceReconstructionRoughnessScale = 1.0f

◆ GLumenReflectionSmoothBias

float GLumenReflectionSmoothBias = 0.0f

◆ GLumenReflectionsSpecularScale

float GLumenReflectionsSpecularScale = 1.f

◆ GLumenReflectionsVisualizeTracingCoherency

int32 GLumenReflectionsVisualizeTracingCoherency = 0

◆ GLumenReflectionTemporalFilter

int32 GLumenReflectionTemporalFilter = 1

◆ GLumenReflectionTraceMeshSDFs

int32 GLumenReflectionTraceMeshSDFs = 1

◆ GReflectionResolveTileSize

const int32 GReflectionResolveTileSize = 8

◆ GVarLumenReflectionsContrast

FAutoConsoleVariableRef GVarLumenReflectionsContrast(TEXT("r.Lumen.Reflections.Contrast"), GLumenReflectionsContrast, TEXT("Non-physically correct Lumen reflection contrast. Recommended to keep at 1."), ECVF_RenderThreadSafe)	(	TEXT("r.Lumen.Reflections.Contrast")	,
		GLumenReflectionsContrast	,
		TEXT("Non-physically correct Lumen reflection contrast. Recommended to keep at 1.")	,
		ECVF_RenderThreadSafe
	)

◆ GVarLumenReflectionsSpecularScale

FAutoConsoleVariableRef GVarLumenReflectionsSpecularScale(TEXT("r.Lumen.Reflections.SpecularScale"), GLumenReflectionsSpecularScale, TEXT("Non-physically correct Lumen specular reflection scale. Recommended to keep at 1."), ECVF_RenderThreadSafe)	(	TEXT("r.Lumen.Reflections.SpecularScale")	,
		GLumenReflectionsSpecularScale	,
		TEXT("Non-physically correct Lumen specular reflection scale. Recommended to keep at 1.")	,
		ECVF_RenderThreadSafe
	)

◆ GVarLumenReflectionsVisualizeTracingCoherency

FAutoConsoleVariableRef GVarLumenReflectionsVisualizeTracingCoherency(TEXT("r.Lumen.Reflections.VisualizeTracingCoherency"), GLumenReflectionsVisualizeTracingCoherency, TEXT("Set to 1 to capture traces from a random wavefront and draw them on the screen. Set to 1 again to re-capture. Shaders must enable support first, see DEBUG_SUPPORT_VISUALIZE_TRACE_COHERENCY"), ECVF_RenderThreadSafe)	(	TEXT("r.Lumen.Reflections.VisualizeTracingCoherency")	,
		GLumenReflectionsVisualizeTracingCoherency	,
		TEXT("Set to 1 to capture traces from a random wavefront and draw them on the screen. Set to 1 again to re-capture. Shaders must enable support first, see DEBUG_SUPPORT_VISUALIZE_TRACE_COHERENCY")	,
		ECVF_RenderThreadSafe
	)

◆ GVisualizeReflectionTracesData

TRefCountPtr<FRDGPooledBuffer> GVisualizeReflectionTracesData

Classes

Namespaces

Functions

Variables