From 6d152cacc908bba3e843fe48097bbf4c0db1b0b2 Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Wed, 4 Apr 2012 17:11:58 +0100
Subject: [PATCH 1/3] Fix for Ati(? Mac?) not allowing writes to 'varying' in a
 fragment shader.

---
 Shaders/deferred-gbuffer.frag | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Shaders/deferred-gbuffer.frag b/Shaders/deferred-gbuffer.frag
index 929743349..f6068010e 100644
--- a/Shaders/deferred-gbuffer.frag
+++ b/Shaders/deferred-gbuffer.frag
@@ -15,8 +15,9 @@ void main() {
     float specular = dot( gl_FrontMaterial.specular.rgb, vec3( 0.3, 0.59, 0.11 ) );
     float shininess = gl_FrontMaterial.shininess;
     float emission = dot( gl_FrontLightModelProduct.sceneColor.rgb, vec3( 0.3, 0.59, 0.11 ) );
-    ecNormal = (2.0 * gl_Color.a - 1.0) * ecNormal;
-    gl_FragData[0] = vec4( (ecNormal.xy + vec2(1.0,1.0)) * 0.5, 0.0, 1.0 );
+    
+	vec3 normal2 = (2.0 * gl_Color.a - 1.0) * ecNormal;
+    gl_FragData[0] = vec4( (normal2.xy + vec2(1.0,1.0)) * 0.5, 0.0, 1.0 );
     gl_FragData[1] = vec4( gl_Color.rgb * texel.rgb, float( materialID ) / 255.0 );
     gl_FragData[2] = vec4( specular, shininess / 255.0, emission, 1.0 );
 }

From 303f11af1dd9dbcb37b9b35a4c3696937a0f31a1 Mon Sep 17 00:00:00 2001
From: Gijs de Rooy <gijsrooy@hotmail.com>
Date: Wed, 4 Apr 2012 18:22:56 +0200
Subject: [PATCH 2/3] Remove unused property from skydome effect.

---
 Effects/skydome.eff | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Effects/skydome.eff b/Effects/skydome.eff
index 09fd3ede9..a7070ff55 100644
--- a/Effects/skydome.eff
+++ b/Effects/skydome.eff
@@ -17,7 +17,6 @@
   <technique n="8">
     <predicate>
       <and>
-        <property>/sim/rendering/shader-effects</property>
         <property>/sim/rendering/shaders/skydome</property>
         <or>
           <less-equal>

From f15b01df8e2411c17b03ebcb0b5e86d1b496824f Mon Sep 17 00:00:00 2001
From: Gijs de Rooy <gijsrooy@hotmail.com>
Date: Wed, 4 Apr 2012 18:40:00 +0200
Subject: [PATCH 3/3] Disable skydome shader when quality-level=0 via
 commandline.

---
 Nasal/gui.nas | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Nasal/gui.nas b/Nasal/gui.nas
index 1eea0ec95..e6b955bea 100644
--- a/Nasal/gui.nas
+++ b/Nasal/gui.nas
@@ -1357,6 +1357,9 @@ if (qualityLevel == -1) {
 elsif (qualityLevel != nil) {
     setprop("/sim/rendering/shaders/custom-settings",0);
     setprop("/sim/rendering/shaders/quality-level-internal",qualityLevel);
+    if (qualityLevel == 0) {
+        setprop("/sim/rendering/shaders/skydome",0);
+    }
 }
 # overwrite custom shader settings when quality-level is set through the slider 
 # in the Rendering Options dialog