From 6a8553a2777f8dd7fa2ffa9e7ec4db070252c462 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Mon, 18 Aug 2025 11:03:50 +0200
Subject: [PATCH] Fix incorrect Lambert Diffuse shadowing to use just `N dot L`
 for accurate lighting

#3615 #3616
---
 Source/Shaders/Lighting.hlsl | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/Source/Shaders/Lighting.hlsl b/Source/Shaders/Lighting.hlsl
index 1429e45d1..9b14db5ed 100644
--- a/Source/Shaders/Lighting.hlsl
+++ b/Source/Shaders/Lighting.hlsl
@@ -122,6 +122,10 @@ float4 GetLighting(float3 viewPos, LightData lightData, GBufferSample gBuffer, f
 
     // Calculate shadow
     ShadowSample shadow = GetShadow(lightData, gBuffer, shadowMask);
+#if !LIGHTING_NO_DIRECTIONAL
+    // Directional shadowing
+    shadow.SurfaceShadow *= NoL;
+#endif
 
     // Calculate attenuation
     if (isRadial)
@@ -135,11 +139,6 @@ float4 GetLighting(float3 viewPos, LightData lightData, GBufferSample gBuffer, f
         shadow.TransmissionShadow *= attenuation;
     }
 
-#if !LIGHTING_NO_DIRECTIONAL
-    // Reduce shadow mapping artifacts
-    shadow.SurfaceShadow *= saturate(NoL * 6.0f - 0.2f) * NoL;
-#endif
-
     BRANCH
     if (shadow.SurfaceShadow + shadow.TransmissionShadow > 0)
     {