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Refactor after feedback of the PR

/Add-support-for-light-specular-color-tint
sebastienlagarde 7 年前
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1d286a5e
共有 2 个文件被更改，包括 164 次插入 和 122 次删除
  1. 40
      ScriptableRenderPipeline/HDRenderPipeline/Lighting/TilePass/TilePassLoop.hlsl
  2. 246
      ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl

40
ScriptableRenderPipeline/HDRenderPipeline/Lighting/TilePass/TilePassLoop.hlsl
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// This struct is define in the material. the Lightloop must not access it
// PostEvaluateBSDF call at the end will convert Lighting to diffuse and specular lighting
Lighting lighting;
ZERO_INITIALIZE(Lighting, lighting); // LightLoop is in charge of initializing the struct
AggregateLighting aggregatelighting;
ZERO_INITIALIZE(AggregateLighting, aggregatelighting); // LightLoop is in charge of initializing the struct
uint i = 0; // Declare once to avoid the D3D11 compiler warning.

{
EvaluateBSDF_Directional(context, V, posInput, preLightData, _DirectionalLightDatas[i], bsdfData, lighting);
DirectLighting lighting = EvaluateBSDF_Directional(context, V, posInput, preLightData, _DirectionalLightDatas[i], bsdfData);
AccumulateDirectLighting(aggregatelighting, lighting);
}
}

for (i = 0; i < punctualLightCount; ++i)
{
int punctualIndex = FetchIndex(punctualLightStart, i);
EvaluateBSDF_Punctual(context, V, posInput, preLightData, _LightDatas[punctualIndex], bsdfData, _LightDatas[punctualIndex].lightType, lighting);
DirectLighting lighting = EvaluateBSDF_Punctual(context, V, posInput, preLightData, _LightDatas[punctualIndex], bsdfData, _LightDatas[punctualIndex].lightType);
AccumulateDirectLighting(aggregatelighting, lighting);
}
#else

EvaluateBSDF_Punctual(context, V, posInput, preLightData, _LightDatas[i], bsdfData, _LightDatas[i].lightType, lighting);
DirectLighting lighting = EvaluateBSDF_Punctual(context, V, posInput, preLightData, _LightDatas[i], bsdfData, _LightDatas[i].lightType);
AccumulateDirectLighting(aggregatelighting, lighting);
}
#endif

while (i < areaLightCount && lightType == GPULIGHTTYPE_LINE)
{
EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[areaIndex], bsdfData, GPULIGHTTYPE_LINE, lighting);
DirectLighting lighting = EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[areaIndex], bsdfData, GPULIGHTTYPE_LINE);
AccumulateDirectLighting(aggregatelighting, lighting);
i++;
areaIndex = i < areaLightCount ? FetchIndex(areaLightStart, i) : 0;
lightType = i < areaLightCount ? _LightDatas[areaIndex].lightType : 0xFF;

{
EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[areaIndex], bsdfData, GPULIGHTTYPE_RECTANGLE, lighting);
DirectLighting lighting = EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[areaIndex], bsdfData, GPULIGHTTYPE_RECTANGLE);
AccumulateDirectLighting(aggregatelighting, lighting);
i++;
areaIndex = i < areaLightCount ? FetchIndex(areaLightStart, i) : 0;
lightType = i < areaLightCount ? _LightDatas[areaIndex].lightType : 0xFF;

for (i = _PunctualLightCount; i < _PunctualLightCount + _AreaLightCount; ++i)
{
EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[i], bsdfData, _LightDatas[i].lightType, lighting);
DirectLighting lighting = EvaluateBSDF_Area(context, V, posInput, preLightData, _LightDatas[i], bsdfData, _LightDatas[i].lightType);
AccumulateDirectLighting(aggregatelighting, lighting);
}
#endif

if (featureFlags & LIGHTFEATUREFLAGS_SSREFRACTION)
{
EvaluateBSDF_SSRefraction(context, V, posInput, preLightData, bsdfData, lighting, refractionHierarchyWeight);
ImageBasedLighting lighting = EvaluateBSDF_SSRefraction(context, V, posInput, preLightData, bsdfData, refractionHierarchyWeight);
AccumulateImageBasedLighting(aggregatelighting, lighting);
EvaluateBSDF_SSReflection(context, V, posInput, preLightData, bsdfData, lighting, reflectionHierarchyWeight);
ImageBasedLighting lighting = EvaluateBSDF_SSReflection(context, V, posInput, preLightData, bsdfData, reflectionHierarchyWeight);
AccumulateImageBasedLighting(aggregatelighting, lighting);
}
if (featureFlags & LIGHTFEATUREFLAGS_ENV || featureFlags & LIGHTFEATUREFLAGS_SKY)

#else
uint envLightIndex = i;
#endif
EvaluateBSDF_Env( context, V, posInput, preLightData, _EnvLightDatas[envLightIndex], bsdfData, _EnvLightDatas[envLightIndex].envShapeType,
lighting, reflectionHierarchyWeight);
ImageBasedLighting lighting = EvaluateBSDF_Env( context, V, posInput, preLightData, _EnvLightDatas[envLightIndex], bsdfData, _EnvLightDatas[envLightIndex].envShapeType,
reflectionHierarchyWeight);
AccumulateImageBasedLighting(aggregatelighting, lighting);
}
}

// The sky is a single cubemap texture separate from the reflection probe texture array (different resolution and compression)
context.sampleReflection = SINGLE_PASS_CONTEXT_SAMPLE_SKY;
EnvLightData envLightSky = InitSkyEnvLightData(0); // The sky data are generated on the fly so the compiler can optimize the code
EvaluateBSDF_Env(context, V, posInput, preLightData, envLightSky, bsdfData, ENVSHAPETYPE_SKY, lighting, reflectionHierarchyWeight);
ImageBasedLighting lighting = EvaluateBSDF_Env(context, V, posInput, preLightData, envLightSky, bsdfData, ENVSHAPETYPE_SKY, reflectionHierarchyWeight);
AccumulateImageBasedLighting(aggregatelighting, lighting);
}
}
}

PostEvaluateBSDF( context, V, posInput, preLightData, bsdfData, bakeDiffuseLighting, lighting,
PostEvaluateBSDF( context, V, posInput, preLightData, bsdfData, bakeDiffuseLighting, aggregatelighting,
diffuseLighting, specularLighting);
ApplyDebug(context, posInput.positionWS, diffuseLighting, specularLighting);

246
ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl
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#ifdef HAS_LIGHTLOOP
//-----------------------------------------------------------------------------
//
// Lighting structure for light accumulation
// This structure allow to accumulate lighting accross the Lit material
// It is init to zero and transfer by the LightLoop, but the LightLoop can't access its content.
struct Lighting
// These structure allow to accumulate lighting accross the Lit material
// AggregateLighting is init to zero and transfer to EvaluateBSDF, but the LightLoop can't access its content.
struct DirectLighting
float3 directDiffuse;
float3 directSpecular;
float3 refraction;
float3 envSpecular;
float3 diffuse;
float3 specular;
struct ImageBasedLighting
{
float3 specularReflected;
float3 specularTransmitted;
};
struct AggregateLighting
{
DirectLighting direct;
ImageBasedLighting ibl;
};
void AccumulateDirectLighting(AggregateLighting dst, DirectLighting src)
{
dst.direct.diffuse += src.diffuse;
dst.direct.specular += src.specular;
}
void AccumulateImageBasedLighting(AggregateLighting dst, ImageBasedLighting src)
{
dst.ibl.specularReflected += src.specularReflected;
dst.ibl.specularTransmitted += src.specularTransmitted;
}
//-----------------------------------------------------------------------------
// BSDF share between directional light, punctual light and area light (reference)

return cookie;
}
void EvaluateBSDF_Directional(LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput, PreLightData preLightData,
DirectionalLightData lightData, BSDFData bsdfData,
inout Lighting lighting)
DirectLighting EvaluateBSDF_Directional( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput, PreLightData preLightData,
DirectionalLightData lightData, BSDFData bsdfData)
DirectLighting lighting;
ZERO_INITIALIZE(DirectLighting, lighting);
float3 positionWS = posInput.positionWS;
float3 L = -lightData.forward; // Lights are pointing backward in Unity

float3 diffuseLighting = float3(0, 0, 0);
float3 specularLighting = float3(0, 0, 0);
float shadow = 1;
float shadow = 1.0;
[branch] if (lightData.shadowIndex >= 0)
{

[branch] if (illuminance > 0.0)
{
BSDF(V, L, positionWS, preLightData, bsdfData, diffuseLighting, specularLighting);
BSDF(V, L, positionWS, preLightData, bsdfData, lighting.diffuse, lighting.specular);
diffuseLighting *= illuminance * lightData.diffuseScale;
specularLighting *= illuminance * lightData.specularScale;
lighting.diffuse *= illuminance * lightData.diffuseScale;
lighting.specular *= illuminance * lightData.specularScale;
}
[branch] if (bsdfData.enableTransmission)

float illuminance = Lambert() * ComputeWrappedDiffuseLighting(-NdotL, SSS_WRAP_LIGHT);
// We use diffuse lighting for accumulation since it is going to be blurred during the SSS pass.
diffuseLighting += EvaluateTransmission(bsdfData, illuminance * lightData.diffuseScale, shadow);
lighting.diffuse += EvaluateTransmission(bsdfData, illuminance * lightData.diffuseScale, shadow);
diffuseLighting *= lightData.color;
specularLighting *= lightData.color;
lighting.diffuse *= lightData.color;
lighting.specular *= lightData.color;
lighting.directDiffuse += diffuseLighting;
lighting.directSpecular += specularLighting;
return lighting;
}
//-----------------------------------------------------------------------------

return attenuation * GetAngleAttenuation(L, -lightData.forward, lightData.angleScale, lightData.angleOffset);
}
void EvaluateBSDF_Punctual( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData, int GPULightType,
inout Lighting lighting)
DirectLighting EvaluateBSDF_Punctual( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData, int GPULightType)
DirectLighting lighting;
ZERO_INITIALIZE(DirectLighting, lighting);
float3 positionWS = posInput.positionWS;
int lightType = GPULightType;

lightData.diffuseScale *= attenuation;
lightData.specularScale *= attenuation;
float3 diffuseLighting = float3(0.0, 0.0, 0.0);
float3 specularLighting = float3(0.0, 0.0, 0.0);
float shadow = 1.0;
[branch] if (lightData.shadowIndex >= 0)

[branch] if (illuminance > 0.0)
{
bsdfData.roughness = max(bsdfData.roughness, lightData.minRoughness); // Simulate that a punctual ligth have a radius with this hack
BSDF(V, L, positionWS, preLightData, bsdfData, diffuseLighting, specularLighting);
bsdfData.roughness = max(bsdfData.roughness, lightData.minRoughness); // Simulate that a punctual light have a radius with this hack
BSDF(V, L, positionWS, preLightData, bsdfData, lighting.diffuse, lighting.specular);
diffuseLighting *= illuminance * lightData.diffuseScale;
specularLighting *= illuminance * lightData.specularScale;
lighting.diffuse *= illuminance * lightData.diffuseScale;
lighting.specular *= illuminance * lightData.specularScale;
}
[branch] if (bsdfData.enableTransmission)

float illuminance = Lambert() * ComputeWrappedDiffuseLighting(-NdotL, SSS_WRAP_LIGHT);
// We use diffuse lighting for accumulation since it is going to be blurred during the SSS pass.
diffuseLighting += EvaluateTransmission(bsdfData, illuminance * lightData.diffuseScale, shadow);
lighting.diffuse += EvaluateTransmission(bsdfData, illuminance * lightData.diffuseScale, shadow);
diffuseLighting *= lightData.color;
specularLighting *= lightData.color;
lighting.diffuse *= lightData.color;
lighting.specular *= lightData.color;
lighting.directDiffuse += diffuseLighting;
lighting.directSpecular += specularLighting;
return lighting;
}
#include "LitReference.hlsl"

//-----------------------------------------------------------------------------
void EvaluateBSDF_Line(LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData,
inout Lighting lighting)
DirectLighting EvaluateBSDF_Line( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData)
DirectLighting lighting;
ZERO_INITIALIZE(DirectLighting, lighting);
float3 diffuseLighting = float3(0.0, 0.0, 0.0);
float3 specularLighting = float3(0.0, 0.0, 0.0);
diffuseLighting, specularLighting);
lighting.diffuse, lighting.specular);
#else
float len = lightData.size.x;
float3 T = lightData.right;

axis, invAspectRatio);
// Terminate if the shaded point is too far away.
if (intensity == 0.0) return;
if (intensity == 0.0)
return lighting;
lightData.diffuseScale *= intensity;
lightData.specularScale *= intensity;

{
ltcValue = LTCEvaluate(P1, P2, B, preLightData.ltcTransformDiffuse);
ltcValue *= lightData.diffuseScale;
diffuseLighting = bsdfData.diffuseColor * (preLightData.ltcMagnitudeDiffuse * ltcValue);
lighting.diffuse = bsdfData.diffuseColor * (preLightData.ltcMagnitudeDiffuse * ltcValue);
}
[branch] if (bsdfData.enableTransmission)

ltcValue *= lightData.diffuseScale;
// We use diffuse lighting for accumulation since it is going to be blurred during the SSS pass.
diffuseLighting += EvaluateTransmission(bsdfData, ltcValue, 1);
lighting.diffuse += EvaluateTransmission(bsdfData, ltcValue, 1);
}
// Evaluate the coat part

{
ltcValue = LTCEvaluate(P1, P2, B, preLightData.ltcTransformSpecular);
ltcValue *= lightData.specularScale;
specularLighting += preLightData.ltcMagnitudeFresnel * ltcValue;
lighting.specular += preLightData.ltcMagnitudeFresnel * ltcValue;
diffuseLighting *= lightData.color;
specularLighting *= lightData.color;
lighting.diffuse *= lightData.color;
lighting.specular *= lightData.color;
lighting.directDiffuse += diffuseLighting;
lighting.directSpecular += specularLighting;
return lighting;
}
//-----------------------------------------------------------------------------

// #define ELLIPSOIDAL_ATTENUATION
void EvaluateBSDF_Rect( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData,
inout Lighting lighting)
DirectLighting EvaluateBSDF_Rect( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData)
DirectLighting lighting;
ZERO_INITIALIZE(DirectLighting, lighting);
float3 diffuseLighting = float3(0.0, 0.0, 0.0);
float3 specularLighting = float3(0.0, 0.0, 0.0);
diffuseLighting, specularLighting);
lighting.diffuse, lighting.specular);
#else
float3 unL = lightData.positionWS - positionWS;

// The light is back-facing.
return;
return lighting;
}
// Rotate the light direction into the light space.

#endif
// Terminate if the shaded point is too far away.
if (intensity == 0.0) return;
if (intensity == 0.0)
return lighting;
lightData.diffuseScale *= intensity;
lightData.specularScale *= intensity;

// Polygon irradiance in the transformed configuration.
ltcValue = PolygonIrradiance(mul(lightVerts, preLightData.ltcTransformDiffuse));
ltcValue *= lightData.diffuseScale;
diffuseLighting = bsdfData.diffuseColor * (preLightData.ltcMagnitudeDiffuse * ltcValue);
lighting.diffuse = bsdfData.diffuseColor * (preLightData.ltcMagnitudeDiffuse * ltcValue);
}
[branch] if (bsdfData.enableTransmission)

ltcValue *= lightData.diffuseScale;
// We use diffuse lighting for accumulation since it is going to be blurred during the SSS pass.
diffuseLighting += EvaluateTransmission(bsdfData, ltcValue, 1);
lighting.diffuse += EvaluateTransmission(bsdfData, ltcValue, 1);
}
// Evaluate the coat part

// ltcValue = LTCEvaluate(lightVerts, V, bsdfData.coatNormalWS, preLightData.coatNdotV, preLightData.ltcXformClearCoat);
// specularLighting = preLightData.ltcClearCoatFresnelTerm * (ltcValue * bsdfData.coatCoverage);
// lighting.specular = preLightData.ltcClearCoatFresnelTerm * (ltcValue * bsdfData.coatCoverage);
// modify matL value based on Fresnel transmission
// matL = mul(matL, preLightData.ltcCoatT);

// Polygon irradiance in the transformed configuration.
ltcValue = PolygonIrradiance(mul(lightVerts, preLightData.ltcTransformSpecular));
ltcValue *= lightData.specularScale;
specularLighting += preLightData.ltcMagnitudeFresnel * ltcValue;
lighting.specular += preLightData.ltcMagnitudeFresnel * ltcValue;
diffuseLighting *= lightData.color;
specularLighting *= lightData.color;
lighting.diffuse *= lightData.color;
lighting.specular *= lightData.color;
lighting.directDiffuse += diffuseLighting;
lighting.directSpecular += specularLighting;
return lighting;
void EvaluateBSDF_Area( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData, int GPULightType,
inout Lighting lighting)
DirectLighting EvaluateBSDF_Area( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, LightData lightData, BSDFData bsdfData, int GPULightType)
EvaluateBSDF_Line(lightLoopContext, V, posInput, preLightData, lightData, bsdfData, lighting);
return EvaluateBSDF_Line(lightLoopContext, V, posInput, preLightData, lightData, bsdfData);
EvaluateBSDF_Rect(lightLoopContext, V, posInput, preLightData, lightData, bsdfData, lighting);
return EvaluateBSDF_Rect(lightLoopContext, V, posInput, preLightData, lightData, bsdfData);
}
}

void EvaluateBSDF_SSReflection( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, BSDFData bsdfData,
inout Lighting lighting, inout float hierarchyWeight)
ImageBasedLighting EvaluateBSDF_SSReflection(LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, BSDFData bsdfData,
inout float hierarchyWeight)
ImageBasedLighting lighting;
ZERO_INITIALIZE(ImageBasedLighting, lighting);
return lighting;
void EvaluateBSDF_SSRefraction( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, BSDFData bsdfData,
inout Lighting lighting, inout float hierarchyWeight)
ImageBasedLighting EvaluateBSDF_SSRefraction(LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, BSDFData bsdfData,
inout float hierarchyWeight)
ImageBasedLighting lighting;
ZERO_INITIALIZE(ImageBasedLighting, lighting);
#if HAS_REFRACTION
// Refraction process:
// 1. Depending on the shape model, we calculate the refracted point in world space and the optical depth

// b. Multiply by the transmittance for absorption (depends on the optical depth)
float3 diffuseLighting = float3(0.0, 0.0, 0.0);
float3 refractedBackPointWS = float3(0.0, 0.0, 0.0);
float opticalDepth = 0.0;

|| any(refractedBackPointSS < 0.0)
|| any(refractedBackPointSS > 1.0))
{
diffuseLighting = SAMPLE_TEXTURE2D_LOD(_GaussianPyramidColorTexture, s_trilinear_clamp_sampler, posInput.positionSS, 0.0).rgb;
lighting.specularTransmitted = SAMPLE_TEXTURE2D_LOD(_GaussianPyramidColorTexture, s_trilinear_clamp_sampler, posInput.positionSS, 0.0).rgb;
return;
return lighting;
diffuseLighting = SAMPLE_TEXTURE2D_LOD(_GaussianPyramidColorTexture, s_trilinear_clamp_sampler, refractedBackPointSS, mipLevel).rgb;
lighting.specularTransmitted = SAMPLE_TEXTURE2D_LOD(_GaussianPyramidColorTexture, s_trilinear_clamp_sampler, refractedBackPointSS, mipLevel).rgb;
diffuseLighting *= transmittance;
lighting.specularTransmitted *= transmittance;
UpdateLightingHierarchyWeights(hierarchyWeight, weight);
lighting.refraction += diffuseLighting * weight;
UpdateLightingHierarchyWeights(hierarchyWeight, weight); // Shouldn't be needed, but safer in case we decide to change hiearchy priority
lighting.specularTransmitted *= weight;
return lighting;
}
//-----------------------------------------------------------------------------

// _preIntegratedFGD and _CubemapLD are unique for each BRDF
void EvaluateBSDF_Env( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, EnvLightData lightData, BSDFData bsdfData, int envShapeType,
inout Lighting lighting, inout float hierarchyWeight)
ImageBasedLighting EvaluateBSDF_Env(LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, EnvLightData lightData, BSDFData bsdfData, int envShapeType,
inout float hierarchyWeight)
ImageBasedLighting lighting;
ZERO_INITIALIZE(ImageBasedLighting, lighting);
float3 specularLighting = float3(0.0, 0.0, 0.0);
specularLighting = IntegrateSpecularGGXIBLRef(lightLoopContext, V, preLightData, lightData, bsdfData);
lighting.specularReflected = IntegrateSpecularGGXIBLRef(lightLoopContext, V, preLightData, lightData, bsdfData);
/*
#ifdef LIT_DIFFUSE_LAMBERT_BRDF

// Evaluate the Clear Coat color
float4 preLD = SampleEnv(lightLoopContext, lightData.envIndex, coatR, 0.0);
specularLighting += F * preLD.rgb * bsdfData.coatCoverage;
lighting.specularReflected += F * preLD.rgb * bsdfData.coatCoverage;
// Change the Fresnel term to account for transmission through Clear Coat and reflection on the base layer.
F = Sqr(-F * bsdfData.coatCoverage + 1.0);

specularLighting += F * preLD.rgb * preLightData.specularFGD;
lighting.specularReflected += F * preLD.rgb * preLightData.specularFGD;
lighting.envSpecular += specularLighting * weight;
lighting.specularReflected *= weight;
}
//-----------------------------------------------------------------------------

void PostEvaluateBSDF( LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,
PreLightData preLightData, BSDFData bsdfData, float3 bakeDiffuseLighting, Lighting lighting,
PreLightData preLightData, BSDFData bsdfData, float3 bakeDiffuseLighting, AggregateLighting lighting,
out float3 diffuseLighting, out float3 specularLighting)
{
// Use GTAOMultiBounce approximation for ambient occlusion (allow to get a tint from the baseColor)

// Try to mimic multibounce with specular color. Not the point of the original formula but ok result.
// Take the min of screenspace specular occlusion and visibility cone specular occlusion
#if GTAO_MULTIBOUNCE_APPROX
lighting.envSpecular *= GTAOMultiBounce(min(bsdfData.specularOcclusion, specularOcclusion), bsdfData.fresnel0);
lighting.ibl.specularReflected *= GTAOMultiBounce(min(bsdfData.specularOcclusion, specularOcclusion), bsdfData.fresnel0);
lighting.envSpecular *= lerp(_AmbientOcclusionParam.rgb, float3(1.0, 1.0, 1.0), min(bsdfData.specularOcclusion, specularOcclusion));
lighting.ibl.specularReflected *= lerp(_AmbientOcclusionParam.rgb, float3(1.0, 1.0, 1.0), min(bsdfData.specularOcclusion, specularOcclusion));
lighting.directDiffuse *=
lighting.direct.diffuse *=
#if GTAO_MULTIBOUNCE_APPROX
GTAOMultiBounce(directAmbientOcclusion, bsdfData.diffuseColor);
#else

diffuseLighting = lighting.directDiffuse + bakeDiffuseLighting;
diffuseLighting = lighting.direct.diffuse + bakeDiffuseLighting;
// Physically speaking, it should be transmittanceMask should be 1, but for artistic reasons, we let the value varie
// Physically speaking, it should be transmittanceMask should be 1, but for artistic reasons, we let the value vary
diffuseLighting = lerp(diffuseLighting, lighting.refraction, bsdfData.transmittanceMask);
diffuseLighting = lerp(diffuseLighting, lighting.ibl.specularTransmitted, bsdfData.transmittanceMask);
specularLighting = lighting.directSpecular + lighting.envSpecular;
specularLighting = lighting.direct.specular + lighting.ibl.specularReflected;
// Rescale the GGX to account for the multiple scattering.
specularLighting *= 1.0 + bsdfData.fresnel0 * preLightData.energyCompensation;

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