update

Assets/Custom RP/Runtime/CameraRenderer.cs

@@ -129,7 +129,7 @@ public partial class CameraRenderer
         {
             enableDynamicBatching = useDynamicBatching,
             enableInstancing = useGPUInstancing,
-            perObjectData = PerObjectData.Lightmaps | PerObjectData.ShadowMask | PerObjectData.LightProbe | PerObjectData.OcclusionProbe | PerObjectData.LightProbeProxyVolume,
+            perObjectData = PerObjectData.Lightmaps | PerObjectData.ShadowMask | PerObjectData.LightProbe | PerObjectData.OcclusionProbe | PerObjectData.LightProbeProxyVolume | PerObjectData.ReflectionProbes,
         };
         // 渲染CustomLit表示的pass块
         drawingSettings.SetShaderPassName(1, litShaderTagId);

Assets/Custom RP/ShaderLibrary/BRDF.hlsl

@@ -11,6 +11,10 @@ struct BRDF
     float3 specular;
     // 粗糙度
     float roughness;
+    // 感知粗糙度
+    float perceptualRoughness;
+    // 菲涅尔反射
+    float fresnel;
 };
 
 // 电介质的反射率平均约0.04
@@ -37,8 +41,9 @@ BRDF GetBRDF(inout Surface surface, bool applyAlphaToDiffuse = false)
 
     brdf.specular = lerp(MIN_REFLECTIVITY, surface.color, surface.metallic);
     // 光滑度转为实际粗糙度
-    float perceptualSmoothness = PerceptualSmoothnessToPerceptualRoughness(surface.smoothness);
-    brdf.roughness = PerceptualRoughnessToRoughness(perceptualSmoothness);
+    brdf.perceptualRoughness = PerceptualSmoothnessToPerceptualRoughness(surface.smoothness);
+    brdf.roughness = PerceptualRoughnessToRoughness(brdf.perceptualRoughness);
+    brdf.fresnel = saturate(surface.smoothness + 1.0 - oneMinusReflectivity);
     return brdf;
 }
 
@@ -63,7 +68,8 @@ float3 DirectBRDF (Surface surface, BRDF brdf, Light light)
 // 获取基于BRDF的间接照明
 float3 IndirectBRDF(Surface surface, BRDF brdf, float3 diffuse, float3 specular)
 {
-    float3 reflection = specular * brdf.specular;
+    float fresnelStrength = surface.fresnelStrength * Pow4(1.0 - saturate(dot(surface.normal, surface.viewDirection)));
+    float3 reflection = specular * lerp(brdf.specular, brdf.fresnel, fresnelStrength);
     reflection /= brdf.roughness * brdf.roughness + 1.0;
     return diffuse * brdf.diffuse + reflection;
 }

Assets/Custom RP/ShaderLibrary/GI.hlsl

@@ -3,6 +3,7 @@
 #define CUSTOM_GI_INCLUDED
 
 #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/EntityLighting.hlsl"
+#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/ImageBasedLighting.hlsl"
 
 TEXTURE2D(unity_Lightmap);
 SAMPLER(samplerunity_Lightmap);
@@ -13,6 +14,9 @@ SAMPLER(samplerunity_ProbeVolumeSH);
 TEXTURE2D(unity_ShadowMask);
 SAMPLER(samplerunity_ShadowMask);
 
+TEXTURECUBE(unity_SpecCube0);
+SAMPLER(samplerunity_SpecCube0);
+
 // 当需要渲染光照贴图对象时
 #if defined(LIGHTMAP_ON)
     #define GI_ATTRIBUTE_DATA float2 lightMapUV : TEXCOORD1;
@@ -31,6 +35,8 @@ struct GI
 {
     // 漫反射颜色
     float3 diffuse;
+    // 镜面反射颜色
+    float3 specular;
     ShadowMask shadowMask;
 };
 
@@ -111,10 +117,22 @@ float4 SampleBakedShadows(float2 lightMapUV, Surface surfaceWS)
     #endif
 }
 
-GI GetGI(float2 lightMapUV, Surface surfaceWS)
+// 采样环境立方体纹理
+float3 SampleEnvironment(Surface surfaceWS, BRDF brdf)
+{
+    float3 uvw = reflect(-surfaceWS.viewDirection, surfaceWS.normal);
+    float mip = PerceptualRoughnessToMipmapLevel(brdf.perceptualRoughness);
+    float4 environment = SAMPLE_TEXTURECUBE_LOD(
+        unity_SpecCube0, samplerunity_SpecCube0, uvw, mip
+    );
+    return DecodeHDREnvironment(environment, unity_SpecCube0_HDR);
+}
+
+GI GetGI(float2 lightMapUV, Surface surfaceWS, BRDF brdf)
 {
     GI gi;
     gi.diffuse = SampleLightMap(lightMapUV) + SampleLightProbe(surfaceWS);
+    gi.specular = SampleEnvironment(surfaceWS, brdf);
     gi.shadowMask.always = false;
     gi.shadowMask.distance = false;
     gi.shadowMask.shadows = 1.0;

Assets/Custom RP/ShaderLibrary/Lighting.hlsl

@@ -22,7 +22,7 @@ float3 GetLighting(Surface surfaceWS, BRDF brdf, GI gi)
     shadowData.shadowMask = gi.shadowMask;
 
     // 可见光的光照结果进行累加得到最终光照结果
-    float3 color = IndirectBRDF(surfaceWS, brdf, gi.diffuse, 1.0);
+    float3 color = IndirectBRDF(surfaceWS, brdf, gi.diffuse, gi.specular);
     for (int i = 0; i < GetDirectionalLightCount(); i++)
     {
         Light light = GetDirectionalLight(i, surfaceWS, shadowData);

Assets/Custom RP/ShaderLibrary/Surface.hlsl

@@ -16,6 +16,8 @@ struct Surface
     float smoothness;
     // 抖动属性
     float dither;
+    // 菲涅尔反射强度
+    float fresnelStrength;
 };
 
 #endif
\ No newline at end of file

Assets/Custom RP/ShaderLibrary/UnityInput.hlsl

@@ -11,6 +11,8 @@ CBUFFER_START(UnityPerDraw)
 
     float4 unity_ProbesOcclusion;
 
+    float4 unity_SpecCube0_HDR;
+
     float4 unity_LightmapST;
     float4 unity_DynamicLightmapST;
 

Assets/Custom RP/Shaders/Lit.shader

@@ -11,14 +11,16 @@ Shader "Custom RP/Lit"
         [Toggle(_RECEIVE_SHADOWS)] _ReceiveShadows ("Receive Shadows", Float) = 1
         // 阴影模式
         [KeywordEnum(On, Clip, Dither, Off)] _Shadows ("Shadows", Float) = 0
-        // 透明通道预乘
-        [Toggle(_PREMULTIPLY_ALPHA)] _PremulAlpha("Premultiply Alpha", Float) = 0
         // 金属度和光滑度
         _Metallic("Metallic", Range(0, 1)) = 0
         _Smoothness("Smoothness", Range(0, 1)) = 0.5
+        // 菲涅尔反射强度
+        _Fresnel ("Fresnel", Range(0, 1)) = 1
         // 自发光
         [NoScaleOffset] _EmissionMap("Emission", 2D) = "white" {}
         [HDR] _EmissionColor("Emission", Color) = (0.0, 0.0, 0.0, 0.0)
+        // 透明通道预乘
+        [Toggle(_PREMULTIPLY_ALPHA)] _PremulAlpha("Premultiply Alpha", Float) = 0
         // 设置混合模式
         [Enum(UnityEngine.Rendering.BlendMode)] _SrcBlend ("Src Blend", Float) = 1
         [Enum(UnityEngine.Rendering.BlendMode)] _DstBlend ("Dst Blend", Float) = 0

Assets/Custom RP/Shaders/LitInput.hlsl

@@ -12,6 +12,7 @@ UNITY_INSTANCING_BUFFER_START(UnityPerMaterial)
     UNITY_DEFINE_INSTANCED_PROP(float, _Cutoff)
     UNITY_DEFINE_INSTANCED_PROP(float, _Metallic)
     UNITY_DEFINE_INSTANCED_PROP(float, _Smoothness)
+    UNITY_DEFINE_INSTANCED_PROP(float, _Fresnel)
 UNITY_INSTANCING_BUFFER_END(UnityPerMaterial)
 
 float2 TransformBaseUV(float2 baseUV)
@@ -53,5 +54,9 @@ float GetSmoothness(float2 baseUV)
     return UNITY_ACCESS_INSTANCED_PROP(UnityPerMaterial, _Smoothness);
 }
 
+float GetFresnel(float2 baseUV)
+{
+    return UNITY_ACCESS_INSTANCED_PROP(UnityPerMaterial, _Fresnel);
+}
 
 #endif
\ No newline at end of file

Assets/Custom RP/Shaders/LitPass.hlsl

@@ -70,6 +70,7 @@ float4 LitPassFragment(Varyings input) : SV_TARGET
     surface.alpha = base.a;
     surface.metallic = GetMetallic(input.baseUV);
     surface.smoothness = GetSmoothness(input.baseUV);
+    surface.fresnelStrength = GetFresnel(input.baseUV);
     // 计算抖动值
     surface.dither = InterleavedGradientNoise(input.positionCS.xy, 0);
     // 通过表面属性和BRDF计算最终光照结果
@@ -79,7 +80,7 @@ float4 LitPassFragment(Varyings input) : SV_TARGET
         BRDF brdf = GetBRDF(surface);
     #endif
     // 获取全局照明数据
-    GI gi = GetGI(GI_FRAGMENT_DATA(input), surface);
+    GI gi = GetGI(GI_FRAGMENT_DATA(input), surface, brdf);
     float3 color = GetLighting(surface, brdf, gi);
     color += GetEmission(input.baseUV);
     return float4(color, surface.alpha);

Assets/Scenes/Baked Light Settings.lighting

@@ -18,9 +18,9 @@ LightingSettings:
   m_UsingShadowmask: 1
   m_BakeBackend: 1
   m_LightmapMaxSize: 1024
-  m_BakeResolution: 40
+  m_BakeResolution: 20
   m_Padding: 2
-  m_TextureCompression: 1
+  m_TextureCompression: 0
   m_AO: 0
   m_AOMaxDistance: 1
   m_CompAOExponent: 1
@@ -41,16 +41,16 @@ LightingSettings:
   m_PVRCulling: 1
   m_PVRSampling: 1
   m_PVRDirectSampleCount: 32
-  m_PVRSampleCount: 512
-  m_PVREnvironmentSampleCount: 256
+  m_PVRSampleCount: 500
+  m_PVREnvironmentSampleCount: 500
   m_PVREnvironmentReferencePointCount: 2048
-  m_LightProbeSampleCountMultiplier: 4
+  m_LightProbeSampleCountMultiplier: 2
   m_PVRBounces: 2
   m_PVRMinBounces: 1
-  m_PVREnvironmentMIS: 1
+  m_PVREnvironmentMIS: 0
   m_PVRFilteringMode: 2
-  m_PVRDenoiserTypeDirect: 1
-  m_PVRDenoiserTypeIndirect: 1
+  m_PVRDenoiserTypeDirect: 0
+  m_PVRDenoiserTypeIndirect: 0
   m_PVRDenoiserTypeAO: 1
   m_PVRFilterTypeDirect: 0
   m_PVRFilterTypeIndirect: 0

Assets/Scenes/Baked Light.unity

@@ -97,10 +97,8 @@ LightmapSettings:
     m_ExportTrainingData: 0
     m_TrainingDataDestination: TrainingData
     m_LightProbeSampleCountMultiplier: 4
-  m_LightingDataAsset: {fileID: 112000000, guid: 4772e383a675c4016a19a76456116c09,
-    type: 2}
-  m_LightingSettings: {fileID: 4890085278179872738, guid: e43cc08759a4c7444a7410feac07b614,
-    type: 2}
+  m_LightingDataAsset: {fileID: 112000000, guid: 4772e383a675c4016a19a76456116c09, type: 2}
+  m_LightingSettings: {fileID: 4890085278179872738, guid: 1556591ee3227314c9a52a04dddc0ddf, type: 2}
 --- !u!196 &4
 NavMeshSettings:
   serializedVersion: 2
@@ -3347,7 +3345,7 @@ Light:
   m_BounceIntensity: 1
   m_ColorTemperature: 6570
   m_UseColorTemperature: 0
-  m_BoundingSphereOverride: {x: 1.02e-43, y: 1.1950786e+34, z: 4.5904e-41, w: 0}
+  m_BoundingSphereOverride: {x: 8.06e-43, y: 1.39e-43, z: 0, w: -0.0000032726402}
   m_UseBoundingSphereOverride: 0
   m_UseViewFrustumForShadowCasterCull: 1
   m_ShadowRadius: 0
@@ -4278,6 +4276,70 @@ MeshFilter:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 859762734}
   m_Mesh: {fileID: 10207, guid: 0000000000000000e000000000000000, type: 0}
+--- !u!1 &869728042
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 869728044}
+  - component: {fileID: 869728043}
+  m_Layer: 0
+  m_Name: Reflection Probe
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!215 &869728043
+ReflectionProbe:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 869728042}
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+  m_UpdateFrequency: 0
+  m_BoxSize: {x: 10, y: 10, z: 10}
+  m_BoxOffset: {x: 0, y: 0, z: 0}
+  m_NearClip: 0.3
+  m_FarClip: 1000
+  m_ShadowDistance: 100
+  m_ClearFlags: 1
+  m_BackGroundColor: {r: 0.19215687, g: 0.3019608, b: 0.4745098, a: 0}
+  m_CullingMask:
+    serializedVersion: 2
+    m_Bits: 4294967295
+  m_IntensityMultiplier: 1
+  m_BlendDistance: 1
+  m_HDR: 1
+  m_BoxProjection: 0
+  m_RenderDynamicObjects: 0
+  m_UseOcclusionCulling: 1
+  m_Importance: 1
+  m_CustomBakedTexture: {fileID: 0}
+--- !u!4 &869728044
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 869728042}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0.10134385, y: 1.3073847, z: -2.0773427}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_Children: []
+  m_Father: {fileID: 0}
+  m_RootOrder: 8
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &901141089
 GameObject:
   m_ObjectHideFlags: 0
@@ -6203,7 +6265,7 @@ Light:
   m_BounceIntensity: 1
   m_ColorTemperature: 6570
   m_UseColorTemperature: 0
-  m_BoundingSphereOverride: {x: 1.016e-42, y: 0, z: 0, w: 6.0005074}
+  m_BoundingSphereOverride: {x: 1.02e-43, y: 1.1950786e+34, z: 4.5904e-41, w: 0}
   m_UseBoundingSphereOverride: 0
   m_UseViewFrustumForShadowCasterCull: 1
   m_ShadowRadius: 0

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Assets/Scenes/Baked Light/Lightmap-0_comp_light.exr.meta

@@ -3,7 +3,7 @@ guid: eb5027765e9124d74aea8517bc5b5ff7
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+  serializedVersion: 11
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@@ -23,6 +23,7 @@ TextureImporter:
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@@ -54,9 +55,13 @@ TextureImporter:
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Assets/Scenes/Baked Light/Lightmap-0_comp_shadowmask.png.meta

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@@ -23,6 +23,7 @@ TextureImporter:
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@@ -48,15 +49,19 @@ TextureImporter:
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   spriteGenerateFallbackPhysicsShape: 1
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Assets/Scenes/Baked Light/ReflectionProbe-0.exr.meta

@@ -3,7 +3,7 @@ guid: 5c403d4740467403b8e46a1e11e971ad
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@@ -23,6 +23,7 @@ TextureImporter:
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@@ -54,9 +55,13 @@ TextureImporter:
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