From 12d9dc6078fbe9c1c40127009f964d98096084dc Mon Sep 17 00:00:00 2001
From: Merlin1809 <88194861+Merlin1809@users.noreply.github.com>
Date: Mon, 4 May 2026 20:09:55 +0200
Subject: [PATCH] Fix lightmap clamp (#3091)

* Fix lightmap clamp

* additional fix
---
 .../irisshaders/iris/pipeline/fallback/ShaderSynthesizer.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/src/main/java/net/irisshaders/iris/pipeline/fallback/ShaderSynthesizer.java b/common/src/main/java/net/irisshaders/iris/pipeline/fallback/ShaderSynthesizer.java
index b667e72368..bf5c160e45 100644
--- a/common/src/main/java/net/irisshaders/iris/pipeline/fallback/ShaderSynthesizer.java
+++ b/common/src/main/java/net/irisshaders/iris/pipeline/fallback/ShaderSynthesizer.java
@@ -140,7 +140,7 @@ public static String vsh(boolean hasChunkOffset, ShaderAttributeInputs inputs, F
 			shader.append("in ivec2 UV2;\n");
 			shader.append("out vec2 lightCoord;\n");
 
-			main.append("    lightCoord = clamp(UV2 / 256.0, vec2(0.5 / 16.0), vec2(15.5 / 16.0));\n");
+			main.append("    lightCoord = clamp(vec2(UV2 + 8) / 256.0, vec2(0.5 / 16.0), vec2(15.5 / 16.0));\n");
 		}