From 3c3a5759b8e9e9d0e6a9163b7157d14c2fbe670d Mon Sep 17 00:00:00 2001
From: Sally Knight <ffqq@danwin1210.de>
Date: Fri, 3 Apr 2026 04:07:48 +0300
Subject: [PATCH] fix(render): clamp combined diffuse lighting to prevent
 overlighting

SPECIFICALLY on the top face where both lights add up to >1, causing the issue in the first place
---
 targets/platform/shaders/vertex.vert | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/targets/platform/shaders/vertex.vert b/targets/platform/shaders/vertex.vert
index e57cddf78..aa4978dd7 100644
--- a/targets/platform/shaders/vertex.vert
+++ b/targets/platform/shaders/vertex.vert
@@ -46,7 +46,7 @@ void main() {
 
         float d0 = max(dot(n, uLight0Dir), 0.0);
         float d1 = max(dot(n, uLight1Dir), 0.0);
-        vColor = vec4(col.rgb * (uLightAmbient + uLightDiffuse * (d0 + d1)), col.a);
+        vColor = vec4(col.rgb * (uLightAmbient + uLightDiffuse * clamp(d0 + d1, 0.0, 1.0)), col.a);
     } else {
         vColor = col;
     }