diff --git a/03-UnrealEngine/Rendering/RenderingPipeline/Lighting/Lighting.md b/03-UnrealEngine/Rendering/RenderingPipeline/Lighting/Lighting.md
index 2775c48..68da717 100644
--- a/03-UnrealEngine/Rendering/RenderingPipeline/Lighting/Lighting.md
+++ b/03-UnrealEngine/Rendering/RenderingPipeline/Lighting/Lighting.md
@@ -360,8 +360,9 @@ void DeferredLightPixelMain(
 		const float SceneDepth = CalcSceneDepth(InputParams.ScreenUV);
 		const FDerivedParams DerivedParams = GetDerivedParams(InputParams, SceneDepth);
 
+		//设置获取光源各种信息
 		FDeferredLightData LightData = InitDeferredLightFromUniforms(CURRENT_LIGHT_TYPE);
-		UpdateLightDataColor(LightData, InputParams, DerivedParams);
+		UpdateLightDataColor(LightData, InputParams, DerivedParams);//根据当前世界坐标计算LightData.Color *= 大气&云&阴影的衰减值 * IES灯亮度（非IES灯数值为1） 
 
 		float3 V =-DerivedParams.CameraVector;
 		float3 L = LightData.Direction;	// Already normalized
@@ -404,7 +405,7 @@ void DeferredLightPixelMain(
 	}
 
 #else // STRATA_ENABLED
-
+	//取得屏幕空间数据（FGbufferData、AO）
 	FScreenSpaceData ScreenSpaceData = GetScreenSpaceData(InputParams.ScreenUV);
 	// Only light pixels marked as using deferred shading
 	BRANCH if (ScreenSpaceData.GBuffer.ShadingModelID > 0
@@ -413,19 +414,23 @@ void DeferredLightPixelMain(
 #endif
 		)
 	{
+		//通过SceneDepth获取的CameraVector以及当前像素的世界坐标
 		const float SceneDepth = CalcSceneDepth(InputParams.ScreenUV);
 		const FDerivedParams DerivedParams = GetDerivedParams(InputParams, SceneDepth);
 
+		//设置获取光源各种信息
 		FDeferredLightData LightData = InitDeferredLightFromUniforms(CURRENT_LIGHT_TYPE);
-		UpdateLightDataColor(LightData, InputParams, DerivedParams);
+		UpdateLightDataColor(LightData, InputParams, DerivedParams);//根据当前世界坐标计算LightData.Color *= 大气&云&阴影的衰减值 * IES灯亮度（非IES灯数值为1） 
+
 
 	 #if USE_HAIR_COMPLEX_TRANSMITTANCE
+		//针对ShadingModel Hair（同时需要CustomData.a > 0)计算头发散射结果
 		if (ScreenSpaceData.GBuffer.ShadingModelID == SHADINGMODELID_HAIR && ShouldUseHairComplexTransmittance(ScreenSpaceData.GBuffer))
 		{
 			LightData.HairTransmittance = EvaluateDualScattering(ScreenSpaceData.GBuffer, DerivedParams.CameraVector, -DeferredLightUniforms.Direction);
 		}
 	#endif
-
+		//计算当前像素的抖动值
 		float Dither = InterleavedGradientNoise(InputParams.PixelPos, View.StateFrameIndexMod8);
 
 		float SurfaceShadow = 1.0f;