diff --git a/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp b/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp
index 7bc36061..121788fd 100644
--- a/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp
+++ b/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp
@@ -1439,7 +1439,7 @@ public:
 			m_part =
 				"lowp float snoise()	\n"
 				"{						\n"
-				"  return 1.0;			\n"
+				"  return 0.5;			\n"
 				"}						\n"
 				;
 		} else {