From 752fc8bb189b3f1afcdc4668707cb3368a96c782 Mon Sep 17 00:00:00 2001
From: Ben Houston <ben@exocortex.com>
Date: Wed, 21 Oct 2015 21:08:50 -0400
Subject: [PATCH] bug fix.

---
 src/renderers/shaders/ShaderChunk/lights_lambert_vertex.glsl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/renderers/shaders/ShaderChunk/lights_lambert_vertex.glsl b/src/renderers/shaders/ShaderChunk/lights_lambert_vertex.glsl
index fe7e9b092f..1b4b80a163 100644
--- a/src/renderers/shaders/ShaderChunk/lights_lambert_vertex.glsl
+++ b/src/renderers/shaders/ShaderChunk/lights_lambert_vertex.glsl
@@ -74,7 +74,7 @@ GeometricContext backGeometry = GeometricContext( geometry.position, -geometry.n
 
 		#ifdef DOUBLE_SIDED
 		
-			vec3 vLightBack = ambientLightColor;
+			vLightBack += ambientLightColor;
 
 		#endif
 
-- 
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