diff --git a/03-UnrealEngine/Rendering/RenderFeature/Lumen学习笔记（4）——Game104学习笔记.md b/03-UnrealEngine/Rendering/RenderFeature/Lumen学习笔记（4）——Game104学习笔记.md
index 56cc392..41e70dd 100644
--- a/03-UnrealEngine/Rendering/RenderFeature/Lumen学习笔记（4）——Game104学习笔记.md
+++ b/03-UnrealEngine/Rendering/RenderFeature/Lumen学习笔记（4）——Game104学习笔记.md
@@ -19,8 +19,7 @@ rating: ⭐
 - SSGI: https://www.ea.com/frostbite/news/stochastic-screen-space-reflections
 - DDGI: 
 	- https://zhuanlan.zhihu.com/p/404520592
-	- https://developer.download.nvidia.com/video/gputechconf/gtc/2019/presentation/s9900irradiance-fields-rtx-diffuse-global-illumination-for-local-and-cloud-graphics.pdf
-	- https://www.jcgt.org/published/0008/02/01/paper-lowress.pdf
+	- https://developer.download.nvidia.com/video/gputechconf/gtc/2019/presentation/s9900-irradiance-fields-rtx-diffuse-global-illumination-for-local-and-cloud-graphics.pdf
 # HIZ Tracing
 
 ![[HierachicalTracing2.png]]