此 Shader 已经不是最新版本，最新版本见本专栏的第四篇文章：
Unity Shader 学习笔记（4）
材质面板截图：
功能实现（URP渲染管线下）：
PBR材质、投射和接收阴影。
代码展示：
Shader "XingWo/Object_PBR_Simplelify"{Properties{_MainColor("Main Color", Color) = (1,1,1,0)_MainTeture("Main Teture", 2D) = "white" {}_RoughnessMap("RoughnessMap", 2D) = "white" {}_Metallic("Metallic", Range( 0 , 1)) = 0.2_Gloss("Gloss", Range( 0 , 1)) = 0.3_NormalIntensity("NormalIntensity", Range( 0.001 , 2)) = 1_NormalMap("Normal Map", 2D) = "bump" {}[HDR]_Emission("Emission", Color) = (0,0,0,0)}SubShader{LOD 100Tags {"RenderPipeline"="UniversalPipeline" "RenderType"="Opaque" "Queue"="Geometry" }Cull OffAlphaToMask OffPass{Name "Forward"Tags {"LightMode"="UniversalForward" }Blend One Zero, One ZeroZWrite OnZTest LEqualHLSLPROGRAM#pragma multi_compile _ _SCREEN_SPACE_OCCLUSION#pragma multi_compile _ _MAIN_LIGHT_SHADOWS#pragma multi_compile _ _MAIN_LIGHT_SHADOWS_CASCADE#pragma multi_compile _ _ADDITIONAL_LIGHTS_VERTEX _ADDITIONAL_LIGHTS _ADDITIONAL_OFF#pragma multi_compile _ _ADDITIONAL_LIGHT_SHADOWS#pragma multi_compile _ _SHADOWS_SOFT#pragma multi_compile _ _MIXED_LIGHTING_SUBTRACTIVE#pragma multi_compile _ LIGHTMAP_SHADOW_MIXING#pragma multi_compile _ SHADOWS_SHADOWMASK#pragma multi_compile _ DIRLIGHTMAP_COMBINED#pragma multi_compile _ LIGHTMAP_ON#pragma vertex vert#pragma fragment frag#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl"#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/UnityInstancing.hlsl"#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/ShaderGraphFunctions.hlsl"#include "Packages/com.unity.shadergraph/ShaderGraphLibrary/Functions.hlsl"struct VertexInput{float4 vertex : POSITION;float3 ase_normal : NORMAL;float4 ase_tangent : TANGENT;float4 texcoord1 : TEXCOORD1;float4 texcoord : TEXCOORD0;};struct VertexOutput{float4 clipPos : SV_POSITION;float4 lightmapUVOrVertexSH : TEXCOORD0;half4 fogFactorAndVertexLight : TEXCOORD1;#if defined(REQUIRES_VERTEX_SHADOW_COORD_INTERPOLATOR)float4 shadowCoord : TEXCOORD2;#endiffloat4 tSpace0 : TEXCOORD3;float4 tSpace1 : TEXCOORD4;float4 tSpace2 : TEXCOORD5;#if defined(ASE_NEEDS_FRAG_SCREEN_POSITION)float4 screenPos : TEXCOORD6;#endiffloat4 ase_texcoord7 : TEXCOORD7;};CBUFFER_START(UnityPerMaterial)float4 _NormalMap_ST;float4 _MainColor;float4 _MainTeture_ST;float4 _Emission;float4 _RoughnessMap_ST;float _NormalIntensity;float _Metallic;float _Gloss;CBUFFER_ENDsampler2D _NormalMap;sampler2D _MainTeture;sampler2D _RoughnessMap;VertexOutput vert( VertexInput v ){VertexOutput o = (VertexOutput)0;o.ase_texcoord7.xy = v.texcoord.xy;//UVo.ase_texcoord7.zw = 0;float3 positionWS = TransformObjectToWorld( v.vertex.xyz );float3 positionVS = TransformWorldToView( positionWS );float4 positionCS = TransformWorldToHClip( positionWS );VertexNormalInputs normalInput = GetVertexNormalInputs(v.ase_normal, v.ase_tangent);o.tSpace0 = float4(normalInput.normalWS, positionWS.x);o.tSpace1 = float4(normalInput.tangentWS, positionWS.y);o.tSpace2 = float4(normalInput.bitangentWS, positionWS.z);half3 vertexLight = VertexLighting( positionWS, normalInput.normalWS );#if defined(REQUIRES_VERTEX_SHADOW_COORD_INTERPOLATOR)VertexPositionInputs vertexInput = (VertexPositionInputs)0;vertexInput.positionWS = positionWS;vertexInput.positionCS = positionCS;o.shadowCoord = GetShadowCoord( vertexInput );#endifo.clipPos = positionCS;return o;}half4 frag ( VertexOutput IN ) : SV_Target{float3 WorldNormal = normalize(IN.tSpace0.xyz);float3 WorldTangent = IN.tSpace1.xyz;float3 WorldBiTangent = IN.tSpace2.xyz;float3 WorldPosition = float3(IN.tSpace0.w,IN.tSpace1.w,IN.tSpace2.w);float3 WorldViewDirection = _WorldSpaceCameraPos.xyz - WorldPosition;float4 ShadowCoords = float4(0, 0, 0, 0);#if defined(REQUIRES_VERTEX_SHADOW_COORD_INTERPOLATOR)ShadowCoords = IN.shadowCoord;#elif defined(MAIN_LIGHT_CALCULATE_SHADOWS)ShadowCoords = TransformWorldToShadowCoord( WorldPosition );#endifWorldViewDirection = SafeNormalize( WorldViewDirection );float2 uv_NormalMap = IN.ase_texcoord7.xy * _NormalMap_ST.xy + _NormalMap_ST.zw;float3 tex2DNode13 = UnpackNormalScale( tex2D( _NormalMap, uv_NormalMap ), 1.0f );float2 appendResult30 = (float2(tex2DNode13.r , tex2DNode13.g));float dotResult36 = dot( appendResult30 , appendResult30 );float3 appendResult40 = (float3(( _NormalIntensity * appendResult30 ) , sqrt( ( 1.0 - saturate( dotResult36 ) ) )));float3 NormalMap47 = appendResult40;float3 normalizeResult147 = normalize( BlendNormal( WorldNormal , NormalMap47 ) );float3 normalizeResult145 = normalize( _MainLightPosition.xyz );float dotResult146 = dot( normalizeResult147 , normalizeResult145 );float halfLambert95 = ( ( dotResult146 * 0.5 ) + 0.5 );float2 uv_MainTeture = IN.ase_texcoord7.xy * _MainTeture_ST.xy + _MainTeture_ST.zw;float4 MainColor50 = ( _MainColor * tex2D( _MainTeture, uv_MainTeture ) );float2 uv_RoughnessMap = IN.ase_texcoord7.xy * _RoughnessMap_ST.xy + _RoughnessMap_ST.zw;float3 Albedo = MainColor50.rgb;float3 Normal = NormalMap47;float3 Emission = _Emission.rgb;float3 Specular = 0.5;float Metallic = _Metallic;float Smoothness = ( _Gloss * tex2D( _RoughnessMap, uv_RoughnessMap ).g );float Occlusion = 1;float Alpha = 1;float AlphaClipThreshold = 0.5;float AlphaClipThresholdShadow = 0.5;float3 BakedGI = 0;float3 RefractionColor = 1;float RefractionIndex = 1;float3 Transmission = 1;float3 Translucency = 1;InputData inputData;inputData.positionWS = WorldPosition;inputData.viewDirectionWS = WorldViewDirection;inputData.shadowCoord = ShadowCoords;inputData.normalWS = TransformTangentToWorld(Normal, half3x3( WorldTangent, WorldBiTangent, WorldNormal ));float3 SH = SampleSH(inputData.normalWS.xyz);inputData.bakedGI = SAMPLE_GI( IN.lightmapUVOrVertexSH.xy, SH, inputData.normalWS );inputData.normalizedScreenSpaceUV = GetNormalizedScreenSpaceUV(IN.clipPos);inputData.shadowMask = SAMPLE_SHADOWMASK(IN.lightmapUVOrVertexSH.xy);half4 color = UniversalFragmentPBR(inputData, Albedo, Metallic, Specular, Smoothness, Occlusion, Emission, Alpha);return color;}ENDHLSL}Pass{Name "ShadowCaster"Tags {"LightMode"="ShadowCaster" }ZWrite OnZTest LEqualAlphaToMask OffHLSLPROGRAM#pragma vertex vert#pragma fragment frag#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/ShaderGraphFunctions.hlsl"#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl"struct VertexInput{float4 vertex : POSITION;float3 ase_normal : NORMAL;};struct VertexOutput{float4 clipPos : SV_POSITION;};CBUFFER_START(UnityPerMaterial)float4 _NormalMap_ST;float4 _MainColor;float4 _MainTeture_ST;float4 _Emission;float4 _RoughnessMap_ST;float _NormalIntensity;float _Metallic;float _Gloss;CBUFFER_ENDfloat3 _LightDirection;VertexOutput vert( VertexInput v ){VertexOutput o;float3 positionWS = TransformObjectToWorld( v.vertex.xyz );float3 normalWS = TransformObjectToWorldDir(v.ase_normal);float4 clipPos = TransformWorldToHClip( ApplyShadowBias( positionWS, normalWS, _LightDirection ) );o.clipPos = clipPos;return o;}half4 frag(VertexOutput IN) : SV_TARGET{float4 ShadowCoords = float4( 0, 0, 0, 0 );#if defined(ASE_NEEDS_FRAG_SHADOWCOORDS)#if defined(REQUIRES_VERTEX_SHADOW_COORD_INTERPOLATOR)ShadowCoords = IN.shadowCoord;#elif defined(MAIN_LIGHT_CALCULATE_SHADOWS)ShadowCoords = TransformWorldToShadowCoord( WorldPosition );#endif#endiffloat Alpha = 1;float AlphaClipThreshold = 0.5;float AlphaClipThresholdShadow = 0.5;return 0;}ENDHLSL}}}
写在最后：
有一些内容可能没有优化到位，不过这个基本就已经可以使用了，可以自定义的加入一下效果，欢迎使用；
如果在使用过程中遇见什么bug和问题，请留言，我会第一时间进行优化处理；
