From 272624f27aa911a4914b3fceada02529179a78d6 Mon Sep 17 00:00:00 2001
From: Sam Hellawell <sshellawell@gmail.com>
Date: Fri, 22 Mar 2024 02:04:31 +0000
Subject: [PATCH] Better per-pixel lighting ambient term

---
 files/shaders/lib/light/lighting.glsl | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/files/shaders/lib/light/lighting.glsl b/files/shaders/lib/light/lighting.glsl
index 8bb6ba148f..535fe22182 100644
--- a/files/shaders/lib/light/lighting.glsl
+++ b/files/shaders/lib/light/lighting.glsl
@@ -42,8 +42,21 @@ void doLighting(vec3 viewPos, vec3 viewNormal, float shininess, out vec3 diffuse
     shininess = max(shininess, 1e-4);
 
     vec3 sunDir = normalize(lcalcPosition(0));
-    diffuseLight = lcalcDiffuse(0) * calcLambert(viewNormal, sunDir, viewDir);
+    vec3 sunColor = lcalcDiffuse(0);
+    float sunIntensity = calcLambert(viewNormal, sunDir, viewDir);
+    diffuseLight = sunColor * sunIntensity;
+
+#if PER_PIXEL_LIGHTING
+    ambientLight = mix(
+        gl_LightModel.ambient.xyz,
+        mix(sunColor, gl_LightModel.ambient.xyz, shadowing),
+        sunIntensity * 0.5
+    );
+#else
     ambientLight = gl_LightModel.ambient.xyz;
+#endif
+   
+
     specularLight = lcalcSpecular(0).xyz * calcSpecIntensity(viewNormal, viewDir, shininess, sunDir);
 #if PER_PIXEL_LIGHTING
     diffuseLight *= shadowing;