From 3e09b9b3353bcaf2b60b4bd3ef3fb2c5a9189ad8 Mon Sep 17 00:00:00 2001
From: Ferenc Arn <tagcup@yahoo.com>
Date: Fri, 29 Sep 2017 10:57:00 -0400
Subject: Fix clearcoat without Schlick-GGX specular.

Fixes #11698.
---
 drivers/gles3/shaders/scene.glsl | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gles3/shaders/scene.glsl b/drivers/gles3/shaders/scene.glsl
index 5c7cfecf3e..7de9b02b8d 100644
--- a/drivers/gles3/shaders/scene.glsl
+++ b/drivers/gles3/shaders/scene.glsl
@@ -1013,7 +1013,7 @@ LIGHT_SHADER_CODE
 #elif defined(SPECULAR_DISABLED)
 		//none..
 
-#else
+#elif defined(SPECULAR_SCHLICK_GGX)
 		// shlick+ggx as default
 		float alpha = roughness * roughness;
 
@@ -1056,6 +1056,12 @@ LIGHT_SHADER_CODE
 #endif
 
 #if defined(LIGHT_USE_CLEARCOAT)
+# if !defined(SPECULAR_SCHLICK_GGX)
+ 		vec3 H = normalize(V + L);
+ 		float dotLH5 = SchlickFresnel( dotLH );
+ 		float dotNH = max(dot(N,H), 0.0 );
+# endif
+
 		float Dr = GTR1(dotNH, mix(.1,.001,clearcoat_gloss));
 		float Fr = mix(.04, 1.0, dotLH5);
 		float Gr = G1V(dotNL, .25) * G1V(dotNV, .25);
-- 
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