diff --git a/03-UnrealEngine/卡通渲染相关资料/演讲笔记/JasonMa/JasonMa渲染方案分析.md b/03-UnrealEngine/卡通渲染相关资料/演讲笔记/JasonMa/JasonMa渲染方案分析.md
index a3ad5ee..ccfd108 100644
--- a/03-UnrealEngine/卡通渲染相关资料/演讲笔记/JasonMa/JasonMa渲染方案分析.md
+++ b/03-UnrealEngine/卡通渲染相关资料/演讲笔记/JasonMa/JasonMa渲染方案分析.md
@@ -455,6 +455,27 @@ FDirectLighting ToonBxDF(FGBufferData GBuffer, half3 N, half3 V, half3 L, float
 
 ```
 
+## Diffuse
+```c++
+...   
+	float3 LightColorAndAttenuation = AreaLight.FalloffColor * MooaToonContext.LightColor * Falloff;
+    ColorSaturationPowerAndScale(LightColorAndAttenuation, View.MooaLightSaturationScale);
+...
+...
+	float DiffuseColorRampU = min3(saturate(Shadow.SurfaceShadow + HairShadowOffset), GBuffer.GBufferAO, ShadowGradient);
+	half4 DiffuseColorRamp = SampleGlobalRamp(View.MooaGlobalDiffuseColorRampAtlas, DiffuseColorRampU, ToonGBuffer.DiffuseColorRampIndex, View.MooaGlobalDiffuseColorRampAtlasHeight);
+	Shadow.SurfaceShadow = DiffuseColorRampU;
+	
+	half3 ToonDiffuseColor = GBuffer.DiffuseColor;
+	half3 ToonShadowColor = ToonGBuffer.MainLightShadowColor * (1 - GBuffer.Metallic) * GetShadowColorIntensity(MooaToonContext);
+#if USE_DEVELOPMENT_SHADERS
+	ToonShadowColor *= View.DiffuseOverrideParameter.w + View.DiffuseOverrideParameter.xyz;
+#endif
+	ToonDiffuseColor = lerp(ToonShadowColor, ToonDiffuseColor, DiffuseColorRamp.a);
+
+	Lighting.Diffuse = Diffuse_Lambert(ToonDiffuseColor) * DiffuseColorRamp.rgb * LightColorAndAttenuation;
+```
+
 # 实用函数
 如果需要脸部SDF阴影，就覆盖ShadowGradient。
 ```c++