LitPassFragment

LightingPhysicallyBased（mainLight）

viewDirWS

color

lightmapUV

.a

smoothness

fogCoord

vertexSH

specularTerm

_Smoothness_SpecColor_Metallic

InitializeStandardLitSurfaceData

Property

fogFactorAndVertexLight.yzw

_BumpMap

特殊修改

reflectionVector

viewDirectionWS

InitializeBRDFData

metallic

potisionWS

LightweightFragmentPBR

SampleSHPixel

unity_SpecCube0unity_SpecCube0_HDR

Light mainLight

indirectDiffuse

_SPECULAR_SETUP

VertexLighting

GetMainLight

alpha

light.colorlight.directionlight.distanceAttenuationlight.shadowAttenuation

TransformTangentToWorld

normalTS

_EmissionColor

specGloss

需要扩展（基本不影响外部）

surfaceReduction

positionWS

Light light.direction = _MainLightPosition.xyz.distanceAttenuation = unity_LightData.z(*unity_ProbesOcclusion.x) (LIGHTMAP_ON)color = _MainLightColor.rgb

SurfaceData surfaceData

SampleAlbedoAlpha

occlusion

fresnelterm

.rgb

GlobalIllumination

perceptualRoughness

_NORMALMAP

EnvironmentBRDF

roughness2MinusOne

_EmissionMap

emission

shadowCoord

MixRealtimeAndBakedGI

SAMPLE_GI

_OcclusionMap

roughness2

SampleMetallicSpecGloss

normalWS.wtangentWS.wbitangentWS.w

roughness

GetAdditionalLight

specular

indirectSpecular

_BaseMap

MixFog

SampleLightMap

tangentWS.xyzbitangentWS.xyznormalWS.xyz

bakedGI

_BaseColor

c

DirectBRDF（LightingPhysicallyBased）

.r

grazingTerm

需判定算法的函数或者参数

SampleOcclusion

1.0

_BumpScale

albedoAlpha

SampleEmission

_Cutoff

Varyings input

diffuse

Alpha

_MainLightPosition.xyzunity_LightData.zunity_ProbesOcclusion.x

GlossyEnvironmentReflection

Texture2D _BumpMap;Texture2D _BaseMap;Texture2D _OcclusionMap;Texture2D _EmissionMap;float4 _BaseMap_ST;half4 _BaseColor;half4 _SpecColor;half4 _EmissionColor;half _Cutoff;half _Smoothness;half _Metallic;half _BumpScale;half _OcclusionStrength;

fogFactorAndVertexLight.x

LightingPhysicallyBased（AdditionalLights）

albedo

SampleNormal

InitializeInputData

BRDFData brdfData

normalWS

_OcclusionStrength

InputDatainputData

uv

normalizationTerm