From b3237e207a54748657d46d1441a8b6a10e5bf2f2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fernando=20Garc=C3=ADa=20Li=C3=B1=C3=A1n?=
 <fernandogarcialinan@gmail.com>
Date: Tue, 22 Dec 2020 10:52:59 +0100
Subject: [PATCH] Add clustered shading support to most Effects and shaders

---
 Compositor/Classic/common-scene.xml      | 8 ++++++++
 Effects/agriculture.eff                  | 1 +
 Effects/airfield.eff                     | 1 +
 Effects/chute.eff                        | 1 +
 Effects/cliffs.eff                       | 1 +
 Effects/crop.eff                         | 1 +
 Effects/dirt-runway.eff                  | 1 +
 Effects/flutter.eff                      | 4 +++-
 Effects/forest.eff                       | 1 +
 Effects/glacier.eff                      | 1 +
 Effects/grass.eff                        | 1 +
 Effects/herbtundra.eff                   | 1 +
 Effects/model-combined.eff               | 9 ++++++---
 Effects/model-default.eff                | 1 +
 Effects/model-interior-display.eff       | 1 +
 Effects/model-interior.eff               | 2 ++
 Effects/model-wingflex.eff               | 4 +++-
 Effects/road.eff                         | 1 +
 Effects/rock.eff                         | 1 +
 Effects/runway.eff                       | 4 +++-
 Effects/terrain-default.eff              | 4 ++++
 Effects/terrain-overlay.eff              | 1 +
 Effects/transition.eff                   | 1 +
 Shaders/agriculture-ALS.frag             | 4 +++-
 Shaders/airfield-ALS.frag                | 3 +++
 Shaders/chute-ALS.vert                   | 5 +++--
 Shaders/cliffs-ALS.frag                  | 4 +++-
 Shaders/crop.frag                        | 2 ++
 Shaders/default.frag                     | 3 +++
 Shaders/default.vert                     | 4 +++-
 Shaders/drunway-ALS.frag                 | 4 +++-
 Shaders/flutter-ALS.vert                 | 3 ++-
 Shaders/flutter.vert                     | 3 ++-
 Shaders/forest.frag                      | 1 +
 Shaders/generic-ALS-base.vert            | 5 +++--
 Shaders/model-ALS-base.frag              | 4 +++-
 Shaders/model-ALS-ultra.frag             | 3 +++
 Shaders/model-ALS-wingflex.vert          | 2 +-
 Shaders/model-interior-ALS-base.frag     | 3 +++
 Shaders/model-interior-ALS-base.vert     | 5 +++--
 Shaders/model-interior-ALS-detailed.frag | 4 ++++
 Shaders/model-interior-ALS-detailed.vert | 5 +++--
 Shaders/model-interior-display-ALS.frag  | 3 +++
 Shaders/road-ALS-ultra.frag              | 3 ++-
 Shaders/rock-ALS.frag                    | 4 +++-
 Shaders/runway-ALS.frag                  | 4 +++-
 Shaders/runway.frag                      | 4 ++++
 Shaders/runway.vert                      | 3 ++-
 Shaders/terrain-ALS-base.frag            | 3 +++
 Shaders/terrain-ALS-detailed.frag        | 4 +++-
 Shaders/terrain-ALS-detailed.vert        | 3 ++-
 Shaders/terrain-ALS-ultra.frag           | 4 ++++
 Shaders/terrain-ALS-ultra.vert           | 5 +++--
 Shaders/transition.frag                  | 3 +++
 Shaders/transition.vert                  | 3 ++-
 Shaders/ubershader.frag                  | 3 +++
 defaults.xml                             | 3 +++
 57 files changed, 139 insertions(+), 31 deletions(-)

diff --git a/Compositor/Classic/common-scene.xml b/Compositor/Classic/common-scene.xml
index e5941b7e8..2b35a82f3 100644
--- a/Compositor/Classic/common-scene.xml
+++ b/Compositor/Classic/common-scene.xml
@@ -6,6 +6,14 @@
   <use-shadow-pass>csm1</use-shadow-pass>
   <use-shadow-pass>csm2</use-shadow-pass>
   <use-shadow-pass>csm3</use-shadow-pass>
+  <clustered-shading>
+    <tile-size>128</tile-size>
+    <depth-slices>1</depth-slices>
+    <num-threads>1</num-threads>
+    <condition>
+      <property>/sim/rendering/clustered-shading/enabled</property>
+    </condition>
+  </clustered-shading>
   <binding>
     <buffer>sun-shadowmap-atlas</buffer>
     <unit>10</unit>
diff --git a/Effects/agriculture.eff b/Effects/agriculture.eff
index 88ec9335c..a81041cde 100644
--- a/Effects/agriculture.eff
+++ b/Effects/agriculture.eff
@@ -252,6 +252,7 @@
         <fragment-shader>Shaders/secondary_lights.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
       </program>
 	  <uniform>
         <name>grain_strength</name>
diff --git a/Effects/airfield.eff b/Effects/airfield.eff
index 7209ca365..b8b9f4872 100644
--- a/Effects/airfield.eff
+++ b/Effects/airfield.eff
@@ -147,6 +147,7 @@
         <fragment-shader>Shaders/secondary_lights.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
         <attribute>
           <name>orthophotoTexCoord</name>
           <index>14</index>
diff --git a/Effects/chute.eff b/Effects/chute.eff
index 163322f6d..68a4e5a67 100644
--- a/Effects/chute.eff
+++ b/Effects/chute.eff
@@ -81,6 +81,7 @@
         <fragment-shader>Shaders/noise.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
       </program>
       <uniform>
         <name>visibility</name>
diff --git a/Effects/cliffs.eff b/Effects/cliffs.eff
index 373f097dc..8fe14091f 100644
--- a/Effects/cliffs.eff
+++ b/Effects/cliffs.eff
@@ -97,6 +97,7 @@
         <fragment-shader>Shaders/secondary_lights.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
       </program>
 	  <uniform>
         <name>intrinsic_wetness</name>
diff --git a/Effects/crop.eff b/Effects/crop.eff
index ebb2cdfbd..e4feeba66 100644
--- a/Effects/crop.eff
+++ b/Effects/crop.eff
@@ -93,6 +93,7 @@
         <fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
         <fragment-shader n="1">Shaders/crop.frag</fragment-shader>
         <fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
       </program>
       <uniform>
         <name>NoiseTex</name>
diff --git a/Effects/dirt-runway.eff b/Effects/dirt-runway.eff
index 333fc3776..35d3ed09b 100644
--- a/Effects/dirt-runway.eff
+++ b/Effects/dirt-runway.eff
@@ -148,6 +148,7 @@
         <fragment-shader n="4">Shaders/secondary_lights.frag</fragment-shader>
         <fragment-shader n="5">Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader n="6">Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader n="7">Shaders/clustered-include.frag</fragment-shader>
       </program>
       <uniform>
         <name>visibility</name>
diff --git a/Effects/flutter.eff b/Effects/flutter.eff
index 2f965b850..75c90c070 100644
--- a/Effects/flutter.eff
+++ b/Effects/flutter.eff
@@ -151,6 +151,7 @@
 				<fragment-shader>Shaders/noise.frag</fragment-shader>
 				<fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
                 <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+                <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
 			</program>
 			<uniform>
 				<name>colorMode</name>
@@ -433,7 +434,8 @@
 				<fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
 				<fragment-shader n="1">Shaders/default.frag</fragment-shader>
                 <fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
-			</program>
+                <fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
+            </program>
 			<!--<uniform>
 				<name>texture</name>
 				<type>sampler-2d</type>
diff --git a/Effects/forest.eff b/Effects/forest.eff
index 566def1f8..631a3ea97 100644
--- a/Effects/forest.eff
+++ b/Effects/forest.eff
@@ -166,6 +166,7 @@
 				<fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
 				<fragment-shader n="1">Shaders/forest.frag</fragment-shader>
                 <fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
+                <fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
         <attribute>
           <name>tangent</name>
           <index>6</index>
diff --git a/Effects/glacier.eff b/Effects/glacier.eff
index 287ecc642..f77274ef2 100644
--- a/Effects/glacier.eff
+++ b/Effects/glacier.eff
@@ -162,6 +162,7 @@
 				<fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
 				<fragment-shader n="1">Shaders/forest.frag</fragment-shader>
                 <fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
+                <fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
         <attribute>
           <name>tangent</name>
           <index>6</index>
diff --git a/Effects/grass.eff b/Effects/grass.eff
index 7402e9e8a..2262d12cc 100644
--- a/Effects/grass.eff
+++ b/Effects/grass.eff
@@ -140,6 +140,7 @@
 	<fragment-shader>Shaders/secondary_lights.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
         <attribute>
           <name>orthophotoTexCoord</name>
           <index>14</index>
diff --git a/Effects/herbtundra.eff b/Effects/herbtundra.eff
index d1834bcc4..15945fc26 100644
--- a/Effects/herbtundra.eff
+++ b/Effects/herbtundra.eff
@@ -162,6 +162,7 @@
 				<fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
 				<fragment-shader n="1">Shaders/forest.frag</fragment-shader>
                 <fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
+                <fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
         <attribute>
           <name>tangent</name>
           <index>6</index>
diff --git a/Effects/model-combined.eff b/Effects/model-combined.eff
index 3a5d2bf3a..33b6f06ea 100644
--- a/Effects/model-combined.eff
+++ b/Effects/model-combined.eff
@@ -450,7 +450,8 @@ please see Docs/README.model-combined.eff for documentation
 				<fragment-shader n="4">Shaders/noise.frag</fragment-shader>
 				<fragment-shader n="5">Shaders/filters-ALS.frag</fragment-shader>
                 <fragment-shader n="6">Shaders/shadows-include.frag</fragment-shader>
-			   </program>
+                <fragment-shader n="7">Shaders/clustered-include.frag</fragment-shader>
+	           </program>
 			   
 			   <uniform>
 				   <name>BaseTex</name>
@@ -1519,7 +1520,8 @@ please see Docs/README.model-combined.eff for documentation
 			  <fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
 			  <fragment-shader n="1">Shaders/ubershader.frag</fragment-shader>
               <fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
-		  </program>
+              <fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
+          </program>
 
 		  <uniform>
 			<name>BaseTex</name>
@@ -2114,7 +2116,8 @@ please see Docs/README.model-combined.eff for documentation
 			  <fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
 			  <fragment-shader n="1">Shaders/ubershader.frag</fragment-shader>
               <fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
-		  </program>
+              <fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
+          </program>
 
 		  <uniform>
 			<name>BaseTex</name>
diff --git a/Effects/model-default.eff b/Effects/model-default.eff
index be34c6906..046ae1fbc 100644
--- a/Effects/model-default.eff
+++ b/Effects/model-default.eff
@@ -137,6 +137,7 @@
         <fragment-shader>Shaders/noise.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
       </program>
       <uniform>
         <name>visibility</name>
diff --git a/Effects/model-interior-display.eff b/Effects/model-interior-display.eff
index e85cf74af..a4b859f35 100644
--- a/Effects/model-interior-display.eff
+++ b/Effects/model-interior-display.eff
@@ -109,6 +109,7 @@
         <fragment-shader>Shaders/noise.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
       </program>
       <uniform>
         <name>visibility</name>
diff --git a/Effects/model-interior.eff b/Effects/model-interior.eff
index 6428b6a23..ec121a7bc 100644
--- a/Effects/model-interior.eff
+++ b/Effects/model-interior.eff
@@ -148,6 +148,7 @@
         <fragment-shader>Shaders/noise.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
       </program>
       <uniform>
         <name>visibility</name>
@@ -565,6 +566,7 @@
         <fragment-shader>Shaders/noise.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
       </program>
       <uniform>
         <name>visibility</name>
diff --git a/Effects/model-wingflex.eff b/Effects/model-wingflex.eff
index 3e295696b..a7a3ca220 100644
--- a/Effects/model-wingflex.eff
+++ b/Effects/model-wingflex.eff
@@ -457,7 +457,8 @@
 				<fragment-shader n="5">Shaders/noise.frag</fragment-shader>
         			<fragment-shader n="6">Shaders/filters-ALS.frag</fragment-shader>
                 <fragment-shader n="7">Shaders/shadows-include.frag</fragment-shader>
-			   </program>
+                <fragment-shader n="8">Shaders/clustered-include.frag</fragment-shader>
+               </program>
 			   
 			   <uniform>
 				   <name>BaseTex</name>
@@ -1550,6 +1551,7 @@
               <fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
 			  <fragment-shader n="1">Shaders/ubershader.frag</fragment-shader>
               <fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
+              <fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
           </program>
 
 		  <uniform>
diff --git a/Effects/road.eff b/Effects/road.eff
index dd3869ca8..7b10a7ca4 100644
--- a/Effects/road.eff
+++ b/Effects/road.eff
@@ -315,6 +315,7 @@
 				<fragment-shader>Shaders/noise.frag</fragment-shader>
 				<fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
                 <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+                <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
 				<attribute>
 					    <name>tangent</name>
 					    <index>6</index>
diff --git a/Effects/rock.eff b/Effects/rock.eff
index 3d0bd0b74..b61b4ee9e 100644
--- a/Effects/rock.eff
+++ b/Effects/rock.eff
@@ -97,6 +97,7 @@
 	<fragment-shader>Shaders/secondary_lights.frag</fragment-shader>
 	<fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
     <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+    <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
       </program>
 	  <uniform>
         <name>intrinsic_wetness</name>
diff --git a/Effects/runway.eff b/Effects/runway.eff
index 6a8abe7f0..fb5807687 100644
--- a/Effects/runway.eff
+++ b/Effects/runway.eff
@@ -213,6 +213,7 @@
         <fragment-shader n="5">Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader n="6">Shaders/lightspot-ALS.frag</fragment-shader>
         <fragment-shader n="7">Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader n="8">Shaders/clustered-include.frag</fragment-shader>
       </program>
       <uniform>
         <name>visibility</name>
@@ -1046,7 +1047,8 @@
                 <fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
 				<fragment-shader n="1">Shaders/runway.frag</fragment-shader>
                 <fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
-				<attribute>
+                <fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
+                <attribute>
 					<name>tangent</name>
 					<index>6</index>
 				</attribute>
diff --git a/Effects/terrain-default.eff b/Effects/terrain-default.eff
index 4d5d0d859..80381e923 100644
--- a/Effects/terrain-default.eff
+++ b/Effects/terrain-default.eff
@@ -330,6 +330,7 @@
         <fragment-shader>Shaders/secondary_lights.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
         <attribute>
           <name>orthophotoTexCoord</name>
           <index>14</index>
@@ -982,6 +983,7 @@
         <fragment-shader>Shaders/hazes.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
         <attribute>
           <name>orthophotoTexCoord</name>
           <index>14</index>
@@ -1300,6 +1302,7 @@
         <fragment-shader>Shaders/noise.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
         <attribute>
           <name>orthophotoTexCoord</name>
           <index>14</index>
@@ -1561,6 +1564,7 @@
         <fragment-shader>Shaders/default.frag</fragment-shader>
         <fragment-shader>Shaders/include_fog.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
         <attribute>
           <name>orthophotoTexCoord</name>
           <index>14</index>
diff --git a/Effects/terrain-overlay.eff b/Effects/terrain-overlay.eff
index 4e6a07f06..ebc82e794 100644
--- a/Effects/terrain-overlay.eff
+++ b/Effects/terrain-overlay.eff
@@ -160,6 +160,7 @@
         <fragment-shader>Shaders/secondary_lights.frag</fragment-shader>
         <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
         <fragment-shader>Shaders/shadows-include.frag</fragment-shader>
+        <fragment-shader>Shaders/clustered-include.frag</fragment-shader>
         <attribute>
           <name>orthophotoTexCoord</name>
           <index>14</index>
diff --git a/Effects/transition.eff b/Effects/transition.eff
index 4349a9e68..7389056d1 100644
--- a/Effects/transition.eff
+++ b/Effects/transition.eff
@@ -251,6 +251,7 @@ parameters :
 				<fragment-shader n="0">Shaders/include_fog.frag</fragment-shader>
 				<fragment-shader n="1">Shaders/transition.frag</fragment-shader>
                 <fragment-shader n="2">Shaders/shadows-include.frag</fragment-shader>
+                <fragment-shader n="3">Shaders/clustered-include.frag</fragment-shader>
 			</program>
 
 			<uniform>
diff --git a/Shaders/agriculture-ALS.frag b/Shaders/agriculture-ALS.frag
index ad132b962..965b76127 100644
--- a/Shaders/agriculture-ALS.frag
+++ b/Shaders/agriculture-ALS.frag
@@ -10,7 +10,7 @@ varying vec3 relPos;
 varying vec2 rawPos;
 varying vec3 worldPos;
 varying vec3 ecViewdir;
-
+varying vec4 ecPosition;
 
 
 uniform sampler2D texture;
@@ -93,6 +93,7 @@ vec3 landing_light(in float offset, in float offsetv);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 
 // a fade function for procedural scales which are smaller than a pixel
@@ -453,6 +454,7 @@ if ((dist < 5000.0)&& (quality_level > 3) && (combined_wetness>0.0))
 
 
     fragColor = color * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
 
    float lightArg = (terminator-yprime_alt)/100000.0;
    vec3 hazeColor = get_hazeColor(lightArg);
diff --git a/Shaders/airfield-ALS.frag b/Shaders/airfield-ALS.frag
index 2b87538a3..c33cc17fe 100644
--- a/Shaders/airfield-ALS.frag
+++ b/Shaders/airfield-ALS.frag
@@ -9,6 +9,7 @@ varying vec3 relPos;
 varying vec3 worldPos;
 varying vec2 rawPos;
 varying vec3 ecViewdir;
+varying vec4 ecPosition;
 varying vec2 orthoTexCoord;
 
 
@@ -83,6 +84,7 @@ vec3 landing_light(in float offset, in float offsetv);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 
 float detail_fade (in float scale, in float angle, in float dist)
@@ -336,6 +338,7 @@ if (quality_level > 3)
     color.rgb +=secondary_light * light_distance_fading(dist);
 
     fragColor = color * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
 
 
     float lightArg = (terminator-yprime_alt)/100000.0;
diff --git a/Shaders/chute-ALS.vert b/Shaders/chute-ALS.vert
index 9c97fdc8b..6c9697b31 100644
--- a/Shaders/chute-ALS.vert
+++ b/Shaders/chute-ALS.vert
@@ -22,6 +22,7 @@
 varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec3 relPos;
+varying vec4 ecPosition;
 
 varying float yprime_alt;
 varying float mie_angle;
@@ -120,7 +121,7 @@ void main()
 
 // this code is copied from default.vert
 
-    //vec4 ecPosition = gl_ModelViewMatrix * gl_Vertex;
+    ecPosition = gl_ModelViewMatrix * gl_Vertex;
     //gl_Position = ftransform();
     gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
     normal = gl_NormalMatrix * gl_Normal;
@@ -287,7 +288,7 @@ else // the faster, full-day version without lightfields
     gl_BackColor.rgb = constant_term.rgb; gl_BackColor.a = 0.0;
     gl_Position = gl_ModelViewProjectionMatrix * vertex;
 
-    setupShadows(gl_ModelViewMatrix * vertex);
+    setupShadows(ecPosition);
 }
 
 
diff --git a/Shaders/cliffs-ALS.frag b/Shaders/cliffs-ALS.frag
index b96e7b7e5..549bbaf5f 100644
--- a/Shaders/cliffs-ALS.frag
+++ b/Shaders/cliffs-ALS.frag
@@ -10,7 +10,7 @@ varying vec3 relPos;
 varying vec2 rawPos;
 varying vec3 worldPos;
 varying vec3 ecViewdir;
-
+varying vec4 ecPosition;
 
 
 varying float steepness;
@@ -84,6 +84,7 @@ vec3 landing_light(in float offset, in float offsetv);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 float light_func (in float x, in float a, in float b, in float c, in float d, in float e)
 {
@@ -427,6 +428,7 @@ if ((dist < 5000.0) && (combined_wetness>0.0))
 
 
     fragColor = color * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
 
 float lightArg = (terminator-yprime_alt)/100000.0;	
 vec3 hazeColor = get_hazeColor(lightArg);
diff --git a/Shaders/crop.frag b/Shaders/crop.frag
index ed0349258..dd575b0b4 100644
--- a/Shaders/crop.frag
+++ b/Shaders/crop.frag
@@ -25,6 +25,7 @@ vec3 fog_Func(vec3 color, int type);
 //////////////////////
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 void main (void)
 {
@@ -71,6 +72,7 @@ void main (void)
 
 	c1 *= ambient_light;
 	vec4 finalColor = c1;
+    finalColor.rgb += getClusteredLightsContribution(ecPosition.xyz, VNormal, basecolor.rgb);
 
 // 	if(gl_Fog.density == 1.0)
 // 		fogFactor=1.0;
diff --git a/Shaders/default.frag b/Shaders/default.frag
index 943671f59..8bd60ccf6 100644
--- a/Shaders/default.frag
+++ b/Shaders/default.frag
@@ -6,6 +6,7 @@
 varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec2 orthoTexCoord;
+varying vec4 ecPosition;
 
 uniform sampler2D texture;
 uniform sampler2D orthophotoTexture;
@@ -19,6 +20,7 @@ vec3 fog_Func(vec3 color, int type);
 //////////////////////
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 float luminance(vec3 color)
 {
@@ -67,6 +69,7 @@ void main()
     }
 
     fragColor = color * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
 
     fragColor.rgb = fog_Func(fragColor.rgb, fogType);
     gl_FragColor = fragColor;
diff --git a/Shaders/default.vert b/Shaders/default.vert
index 0635ee02a..ef8cfa17c 100644
--- a/Shaders/default.vert
+++ b/Shaders/default.vert
@@ -21,6 +21,7 @@ attribute vec2 orthophotoTexCoord;
 varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec2 orthoTexCoord;
+varying vec4 ecPosition;
 
 uniform int colorMode;
 
@@ -35,6 +36,7 @@ void setupShadows(vec4 eyeSpacePos);
 void main()
 {
     gl_Position = ftransform();
+    ecPosition = gl_ModelViewMatrix * gl_Vertex;
     gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
     orthoTexCoord = orthophotoTexCoord;
     normal = gl_NormalMatrix * gl_Normal;
@@ -64,5 +66,5 @@ void main()
     gl_BackColor.rgb = constant_term.rgb; gl_BackColor.a = 0.0;
     //fogCoord = abs(ecPosition.z / ecPosition.w);
 		//fog_Func(fogType);
-    setupShadows(gl_ModelViewMatrix * gl_Vertex);
+    setupShadows(ecPosition);
 }
diff --git a/Shaders/drunway-ALS.frag b/Shaders/drunway-ALS.frag
index cccb77060..b40913b24 100644
--- a/Shaders/drunway-ALS.frag
+++ b/Shaders/drunway-ALS.frag
@@ -8,6 +8,7 @@ varying vec3 normal;
 varying vec3 relPos;
 varying vec2 rawPos;
 varying vec3 ecViewdir;
+varying vec4 ecPosition;
 
 
 uniform sampler2D texture;
@@ -84,6 +85,7 @@ vec3 get_hazeColor(in float light_arg);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 
 void main()
@@ -319,7 +321,7 @@ if ((dist < 5000.0)&& (quality_level > 3) && (wetness>0.0))
     color.rgb +=secondary_light * light_distance_fading(dist);
 
     fragColor = color * texel + specular;
-
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
 
 float lightArg = (terminator-yprime_alt)/100000.0;
 
diff --git a/Shaders/flutter-ALS.vert b/Shaders/flutter-ALS.vert
index 9c0f9c4ee..bcbeac019 100644
--- a/Shaders/flutter-ALS.vert
+++ b/Shaders/flutter-ALS.vert
@@ -24,6 +24,7 @@
 varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec3 relPos;
+varying vec4 ecPosition;
 
 varying float yprime_alt;
 varying float mie_angle;
@@ -142,7 +143,7 @@ void main()
     gl_Position = gl_ModelViewProjectionMatrix * pos;
 
     //do the colour and fog
-    vec4 ecPosition = gl_ModelViewMatrix * gl_Vertex;
+    ecPosition = gl_ModelViewMatrix * gl_Vertex;
 
 
     gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
diff --git a/Shaders/flutter.vert b/Shaders/flutter.vert
index 3de78d2a3..4d93d7dad 100644
--- a/Shaders/flutter.vert
+++ b/Shaders/flutter.vert
@@ -23,6 +23,7 @@
 varying vec4 diffuse_term;
 varying vec3 normal;
 //varying float fogCoord;
+varying vec4 ecPosition;
 
 uniform int colorMode;
 uniform float osg_SimulationTime;
@@ -107,7 +108,7 @@ void main()
     gl_Position = gl_ModelViewProjectionMatrix * pos;
 
     //do the colour and fog
-    vec4 ecPosition = gl_ModelViewMatrix * gl_Vertex;
+    ecPosition = gl_ModelViewMatrix * gl_Vertex;
 
     gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
     normal = gl_NormalMatrix * gl_Normal;
diff --git a/Shaders/forest.frag b/Shaders/forest.frag
index 084fded6e..220474bc9 100644
--- a/Shaders/forest.frag
+++ b/Shaders/forest.frag
@@ -189,6 +189,7 @@ void main (void)
 
 	c1 *= ambient_light;
 	vec4 finalColor = c1;
+    finalColor.rgb += getClusteredLightsContribution(ecPosition.xyz, VNormal, basecolor.rgb);
 
 	finalColor.rgb = fog_Func(finalColor.rgb, fogType);
 	gl_FragColor = finalColor;
diff --git a/Shaders/generic-ALS-base.vert b/Shaders/generic-ALS-base.vert
index 798259b3e..3c531c444 100644
--- a/Shaders/generic-ALS-base.vert
+++ b/Shaders/generic-ALS-base.vert
@@ -25,6 +25,7 @@ varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec3 relPos;
 varying vec2 orthoTexCoord;
+varying vec4 ecPosition;
 
 varying float yprime_alt;
 varying float mie_angle;
@@ -77,7 +78,7 @@ void main()
 
 // this code is copied from default.vert
 
-    //vec4 ecPosition = gl_ModelViewMatrix * gl_Vertex;
+    ecPosition = gl_ModelViewMatrix * gl_Vertex;
     gl_Position = ftransform();
     gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
     orthoTexCoord = orthophotoTexCoord;
@@ -244,7 +245,7 @@ else // the faster, full-day version without lightfields
     gl_FrontColor.rgb = constant_term.rgb;  gl_FrontColor.a = 1.0;
     gl_BackColor.rgb = constant_term.rgb; gl_BackColor.a = 0.0;
 
-    setupShadows(gl_ModelViewMatrix * gl_Vertex);
+    setupShadows(ecPosition);
 }
 
 
diff --git a/Shaders/model-ALS-base.frag b/Shaders/model-ALS-base.frag
index ecd756ff1..d97548769 100644
--- a/Shaders/model-ALS-base.frag
+++ b/Shaders/model-ALS-base.frag
@@ -6,7 +6,7 @@
 varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec3 relPos;
-
+varying vec4 ecPosition;
 
 uniform sampler2D texture;
 
@@ -57,6 +57,7 @@ vec3 landing_light(in float offset, in float offsetv);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 float luminance(vec3 color)
 {
@@ -147,6 +148,7 @@ void main()
 
     texel = texture2D(texture, gl_TexCoord[0].st);
     fragColor = color * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
 
 
 float lightArg = (terminator-yprime_alt)/100000.0;
diff --git a/Shaders/model-ALS-ultra.frag b/Shaders/model-ALS-ultra.frag
index 56bc9e3a5..3aa7a5504 100644
--- a/Shaders/model-ALS-ultra.frag
+++ b/Shaders/model-ALS-ultra.frag
@@ -120,6 +120,7 @@ vec3 moonlight_perception (in vec3 light) ;
 vec3 addLights(in vec3 color1, in vec3 color2);
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 
 float light_func (in float x, in float a, in float b, in float c, in float d, in float e)
@@ -505,6 +506,8 @@ void main (void)
 
     fragColor += Specular * nmap.a;
 
+    fragColor.rgb += getClusteredLightsContribution(vertVec, N, texel.rgb);
+
     //////////////////////////////////////////////////////////////////////
     // BEGIN lightmap
     //////////////////////////////////////////////////////////////////////
diff --git a/Shaders/model-ALS-wingflex.vert b/Shaders/model-ALS-wingflex.vert
index b9e58372c..ec758816b 100644
--- a/Shaders/model-ALS-wingflex.vert
+++ b/Shaders/model-ALS-wingflex.vert
@@ -247,5 +247,5 @@ void	main(void)
 		//gl_Position = ftransform();
 		gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
 
-        setupShadows(gl_ModelViewMatrix * vertex);
+        setupShadows(ecPosition);
 }
diff --git a/Shaders/model-interior-ALS-base.frag b/Shaders/model-interior-ALS-base.frag
index 979174d60..04c6432d4 100644
--- a/Shaders/model-interior-ALS-base.frag
+++ b/Shaders/model-interior-ALS-base.frag
@@ -6,6 +6,7 @@
 varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec3 relPos;
+varying vec4 ecPosition;
 
 
 uniform sampler2D texture;
@@ -63,6 +64,7 @@ vec3 flashlight(in vec3 color, in float radius);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 float luminance(vec3 color)
 {
@@ -173,6 +175,7 @@ void main()
 
     texel = texture2D(texture, gl_TexCoord[0].st);
     fragColor = color * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
 
    // implicit lightmap - the user gets to select 
 
diff --git a/Shaders/model-interior-ALS-base.vert b/Shaders/model-interior-ALS-base.vert
index aabece957..b352328ac 100644
--- a/Shaders/model-interior-ALS-base.vert
+++ b/Shaders/model-interior-ALS-base.vert
@@ -22,6 +22,7 @@
 varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec3 relPos;
+varying vec4 ecPosition;
 
 varying float yprime_alt;
 varying float mie_angle;
@@ -76,7 +77,7 @@ void main()
 
 // this code is copied from default.vert
 
-    //vec4 ecPosition = gl_ModelViewMatrix * gl_Vertex;
+    ecPosition = gl_ModelViewMatrix * gl_Vertex;
     gl_Position = ftransform();
     gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
     normal = gl_NormalMatrix * gl_Normal;
@@ -243,6 +244,6 @@ else // the faster, full-day version without lightfields
     gl_BackColor.rgb = constant_term.rgb; gl_BackColor.a = 0.0;
 
     if (shadow_mapping_enabled) {
-        setupShadows(gl_ModelViewMatrix * gl_Vertex);
+        setupShadows(ecPosition);
     }
 }
diff --git a/Shaders/model-interior-ALS-detailed.frag b/Shaders/model-interior-ALS-detailed.frag
index eb78c86d7..6a3745a7b 100644
--- a/Shaders/model-interior-ALS-detailed.frag
+++ b/Shaders/model-interior-ALS-detailed.frag
@@ -7,6 +7,7 @@ varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec3 relPos;
 varying vec3 rawpos;
+varying vec4 ecPosition;
 
 
 uniform sampler2D texture;
@@ -79,6 +80,7 @@ vec3 flashlight(in vec3 color, in float radius);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 float luminance(vec3 color)
 {
@@ -205,6 +207,8 @@ void main()
     fragColor = color * texel;
     fragColor.rgb += specular.rgb;
 
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
+
    // implicit lightmap - the user gets to select a color which is then made emissive
 
    if (implicit_lightmap_enabled == 1)
diff --git a/Shaders/model-interior-ALS-detailed.vert b/Shaders/model-interior-ALS-detailed.vert
index 639d6815b..537c7b0dc 100644
--- a/Shaders/model-interior-ALS-detailed.vert
+++ b/Shaders/model-interior-ALS-detailed.vert
@@ -23,6 +23,7 @@ varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec3 relPos;
 varying vec3 rawpos;
+varying vec4 ecPosition;
 
 varying float yprime_alt;
 varying float mie_angle;
@@ -86,7 +87,7 @@ void main()
 
 // this code is copied from default.vert
 
-    //vec4 ecPosition = gl_ModelViewMatrix * gl_Vertex;
+    ecPosition = gl_ModelViewMatrix * gl_Vertex;
     gl_Position = ftransform();
     gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
     normal = gl_NormalMatrix * gl_Normal;
@@ -301,7 +302,7 @@ else // the faster, full-day version without lightfields
     gl_BackColor.rgb = constant_term.rgb; gl_BackColor.a = 0.0;
 
     if (shadow_mapping_enabled) {
-        setupShadows(gl_ModelViewMatrix * gl_Vertex);
+        setupShadows(ecPosition);
     }
 }
 
diff --git a/Shaders/model-interior-display-ALS.frag b/Shaders/model-interior-display-ALS.frag
index 009048ecb..400540d6b 100644
--- a/Shaders/model-interior-display-ALS.frag
+++ b/Shaders/model-interior-display-ALS.frag
@@ -6,6 +6,7 @@
 varying vec4 diffuse_term;
 varying vec3 normal;
 varying vec3 relPos;
+varying vec4 ecPosition;
 
 
 uniform sampler2D texture;
@@ -85,6 +86,7 @@ vec3 flashlight(in vec3 color, in float radius);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 float luminance(vec3 color)
 {
@@ -308,6 +310,7 @@ void main()
 
 
     fragColor = color * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
 
    // explicit lightmap
 
diff --git a/Shaders/road-ALS-ultra.frag b/Shaders/road-ALS-ultra.frag
index 89a21da9e..7296d5dbd 100644
--- a/Shaders/road-ALS-ultra.frag
+++ b/Shaders/road-ALS-ultra.frag
@@ -114,6 +114,7 @@ vec3 filter_combined (in vec3 color) ;
 vec3 addLights(in vec3 color1, in vec3 color2);
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 
 float light_func (in float x, in float a, in float b, in float c, in float d, in float e)
@@ -625,7 +626,7 @@ void main (void)
 
     fragColor += Specular * nmap.a;
 
-
+    fragColor.rgb += getClusteredLightsContribution(vertVec, N, texel.rgb);
 
     //////////////////////////////////////////////////////////////////////
     // BEGIN procedural lightmap
diff --git a/Shaders/rock-ALS.frag b/Shaders/rock-ALS.frag
index b764f7fb5..f55a05f60 100644
--- a/Shaders/rock-ALS.frag
+++ b/Shaders/rock-ALS.frag
@@ -9,7 +9,7 @@ varying vec3 relPos;
 varying vec2 rawPos;
 varying vec3 worldPos;
 varying vec3 ecViewdir;
-
+varying vec4 ecPosition;
 
 
 varying float steepness;
@@ -85,6 +85,7 @@ vec3 landing_light(in float offset, in float offsetv);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 float light_func (in float x, in float a, in float b, in float c, in float d, in float e)
 {
@@ -486,6 +487,7 @@ if ((dist < 5000.0) && (combined_wetness>0.0))
 
 
     fragColor = color * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
 
 float lightArg = (terminator-yprime_alt)/100000.0;	
 vec3 hazeColor = get_hazeColor(lightArg);
diff --git a/Shaders/runway-ALS.frag b/Shaders/runway-ALS.frag
index fdacfc916..56129de64 100644
--- a/Shaders/runway-ALS.frag
+++ b/Shaders/runway-ALS.frag
@@ -9,6 +9,7 @@ varying vec3 relPos;
 varying vec2 rawPos;
 varying vec3 worldPos;
 varying vec3 ecViewdir;
+varying vec4 ecPosition;
 
 
 uniform sampler2D texture;
@@ -74,6 +75,7 @@ vec3 get_hazeColor(in float light_arg);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 
 void main()
@@ -343,7 +345,7 @@ if ((dist < 5000.0)&& (quality_level > 3) && (wetness>0.0))
     color.rgb +=secondary_light * light_distance_fading(dist) + lightspot(relPos);
 
     fragColor = color * texel + specular;
-
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb + (2.0 * N.r + 0.1 * (noise_01m-0.5))* (1.0 - water_factor)) ;
 
 float lightArg = (terminator-yprime_alt)/100000.0;
 
diff --git a/Shaders/runway.frag b/Shaders/runway.frag
index 7ed26f317..b45e0ffda 100644
--- a/Shaders/runway.frag
+++ b/Shaders/runway.frag
@@ -10,6 +10,7 @@ varying vec3  VTangent;
 varying vec3  VBinormal;
 varying vec3  vViewVec;
 varying vec3  reflVec;
+varying vec3  vertVec;
 
 varying vec4 Diffuse;
 varying float alpha;
@@ -39,6 +40,7 @@ vec3 fog_Func(vec3 color, int type);
 //////////////////////
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 void main (void)
 {
@@ -130,6 +132,8 @@ void main (void)
     vec4 fragColor = vec4(color.rgb * mixedcolor.rgb  + ambient_Correction.rgb * (1.0 - refl_correction * (1.0 - 0.8 * lightness)) * nFactor, color.a);
 	fragColor += Specular * nmap.a * nFactor;
 
+    fragColor.rgb += getClusteredLightsContribution(vertVec, N, texel.rgb);
+
     fragColor.rgb = fog_Func(fragColor.rgb, fogType);
     gl_FragColor = fragColor;
 }
diff --git a/Shaders/runway.vert b/Shaders/runway.vert
index b1ee32efa..66344e1a8 100644
--- a/Shaders/runway.vert
+++ b/Shaders/runway.vert
@@ -11,6 +11,7 @@ varying vec3  VBinormal;
 varying vec3  Normal;
 varying vec3 vViewVec;
 varying vec3 reflVec;
+varying vec3 vertVec;
 
 varying vec4 Diffuse;
 varying float alpha;
@@ -56,7 +57,7 @@ void main(void)
         alpha = gl_Color.a;
 
     // Vertex in eye coordinates
-    vec3 vertVec = ecPosition.xyz;
+    vertVec = ecPosition.xyz;
 
     vViewVec.x = dot(t, vertVec);
     vViewVec.y = dot(b, vertVec);
diff --git a/Shaders/terrain-ALS-base.frag b/Shaders/terrain-ALS-base.frag
index dffde6229..841eb6a03 100644
--- a/Shaders/terrain-ALS-base.frag
+++ b/Shaders/terrain-ALS-base.frag
@@ -15,6 +15,7 @@ uniform sampler2D orthophotoTexture;
 varying float yprime_alt;
 varying float mie_angle;
 varying vec2 orthoTexCoord;
+varying vec4 ecPosition;
 
 
 uniform float visibility;
@@ -40,6 +41,7 @@ vec3 get_hazeColor(in float light_arg);
 vec3 filter_combined (in vec3 color);
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 float luminance(vec3 color)
 {
@@ -99,6 +101,7 @@ void main()
     }
 
     fragColor = color * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
 
 
 
diff --git a/Shaders/terrain-ALS-detailed.frag b/Shaders/terrain-ALS-detailed.frag
index 2dcb0bf9f..f59040dbd 100644
--- a/Shaders/terrain-ALS-detailed.frag
+++ b/Shaders/terrain-ALS-detailed.frag
@@ -9,7 +9,7 @@ varying vec3 relPos;
 varying vec2 rawPos;
 varying vec3 worldPos;
 varying vec2 orthoTexCoord;
-
+varying vec4 eyePos;
 
 
 uniform sampler2D texture;
@@ -61,6 +61,7 @@ vec3 get_hazeColor(in float light_arg);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 
 void main()
@@ -338,6 +339,7 @@ if ((dist < 5000.0)&& (quality_level > 3) && (wetness>0.0))
 
 
     fragColor = color * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(eyePos.xyz, n, texel.rgb);
 
 // here comes the terrain haze model
 
diff --git a/Shaders/terrain-ALS-detailed.vert b/Shaders/terrain-ALS-detailed.vert
index 2b29bcee4..17d2dc156 100644
--- a/Shaders/terrain-ALS-detailed.vert
+++ b/Shaders/terrain-ALS-detailed.vert
@@ -27,6 +27,7 @@ varying vec3 relPos;
 varying vec2 rawPos;
 varying vec3 worldPos;
 varying vec2 orthoTexCoord;
+varying vec4 eyePos;
 
 
 varying float mie_angle;
@@ -88,7 +89,7 @@ void main()
   float scattering;
 
     rawPos = gl_Vertex.xy;
-    vec4 eyePos = gl_ModelViewMatrix * gl_Vertex;
+    eyePos = gl_ModelViewMatrix * gl_Vertex;
     worldPos = (osg_ViewMatrixInverse * eyePos).xyz;
     steepness = dot(normalize(gl_Normal), vec3 (0.0, 0.0, 1.0));
 
diff --git a/Shaders/terrain-ALS-ultra.frag b/Shaders/terrain-ALS-ultra.frag
index df6b224a2..8ef7fb468 100644
--- a/Shaders/terrain-ALS-ultra.frag
+++ b/Shaders/terrain-ALS-ultra.frag
@@ -11,6 +11,7 @@ varying vec3 worldPos;
 varying vec3 ecViewdir;
 varying vec2 grad_dir;
 varying vec2 orthoTexCoord;
+varying vec4 ecPosition;
 
 
 uniform sampler2D texture;
@@ -93,6 +94,7 @@ vec3 landing_light(in float offset, in float offsetv);
 vec3 filter_combined (in vec3 color) ;
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 
 // a fade function for procedural scales which are smaller than a pixel
@@ -497,6 +499,8 @@ if ((dist < 5000.0) && (combined_wetness>0.0))
 
 
     fragColor = color * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(ecPosition.xyz, n, texel.rgb);
+
 
    float lightArg = (terminator-yprime_alt)/100000.0;
    vec3 hazeColor = get_hazeColor(lightArg);
diff --git a/Shaders/terrain-ALS-ultra.vert b/Shaders/terrain-ALS-ultra.vert
index f58ab8ee1..191061152 100644
--- a/Shaders/terrain-ALS-ultra.vert
+++ b/Shaders/terrain-ALS-ultra.vert
@@ -29,6 +29,7 @@ varying vec3 worldPos;
 varying vec3 ecViewdir;
 varying vec2 grad_dir;
 varying vec2 orthoTexCoord;
+varying vec4 ecPosition;
 
 varying float mie_angle;
 varying float steepness;
@@ -110,7 +111,7 @@ void main()
 
 // this code is copied from default.vert
 
-    //vec4 ecPosition = gl_ModelViewMatrix * gl_Vertex;
+    ecPosition = gl_ModelViewMatrix * gl_Vertex;
     //gl_Position = ftransform();
     gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
     orthoTexCoord = orthophotoTexCoord;
@@ -296,7 +297,7 @@ if (use_IR_vision)
     gl_FrontColor.a = mie_angle;
     gl_BackColor.a = mie_angle;
 
-    setupShadows(gl_ModelViewMatrix * gl_Vertex);
+    setupShadows(ecPosition);
 }
 
 
diff --git a/Shaders/transition.frag b/Shaders/transition.frag
index 29f09c201..b750c4e8c 100644
--- a/Shaders/transition.frag
+++ b/Shaders/transition.frag
@@ -9,6 +9,7 @@ varying float   RawPosZ;
 varying vec3	WorldPos;
 varying vec3	normal;
 varying vec3    Vnormal;
+varying vec4    eyePos;
 
 uniform float	SnowLevel;
 uniform float   Transitions;
@@ -35,6 +36,7 @@ vec3 fog_Func(vec3 color, int type);
 //////////////////////
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 void main()
     {
@@ -159,6 +161,7 @@ void main()
         }
 
     vec4	fragColor = diffuseColor * texel + specular;
+    fragColor.rgb += getClusteredLightsContribution(eyePos.xyz, n, texel.rgb);
 
     if(cover >= 2.5){
         fragColor.rgb = fragColor.rgb * 1.2;
diff --git a/Shaders/transition.vert b/Shaders/transition.vert
index 06a9f8fb1..9325f6d51 100644
--- a/Shaders/transition.vert
+++ b/Shaders/transition.vert
@@ -9,6 +9,7 @@
 
 varying float	RawPosZ;
 varying vec3	WorldPos;
+varying vec4    eyePos;
 varying vec3	normal;
 varying vec3	Vnormal;
 
@@ -19,7 +20,7 @@ void setupShadows(vec4 eyeSpacePos);
 void main()
     {
     RawPosZ = gl_Vertex.z;
-    vec4 eyePos = gl_ModelViewMatrix * gl_Vertex;
+    eyePos = gl_ModelViewMatrix * gl_Vertex;
 	WorldPos = (osg_ViewMatrixInverse * eyePos).xyz;
     gl_Position = ftransform();
     gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
diff --git a/Shaders/ubershader.frag b/Shaders/ubershader.frag
index d8a2f7b77..32a3b7170 100644
--- a/Shaders/ubershader.frag
+++ b/Shaders/ubershader.frag
@@ -66,6 +66,7 @@ vec3 fog_Func(vec3 color, int type);
 ////////////////////////////////////
 
 float getShadowing();
+vec3 getClusteredLightsContribution(vec3 p, vec3 n, vec3 texel);
 
 
 //////rotation matrices/////////////////////////////////////////////////////////
@@ -262,6 +263,8 @@ void main (void)
 
 	fragColor += Specular * nmap.a;
 
+    fragColor.rgb += getClusteredLightsContribution(eyeVec, N, texel.rgb);
+
 	//////////////////////////////////////////////////////////////////////
 	// BEGIN lightmap
 	//////////////////////////////////////////////////////////////////////
diff --git a/defaults.xml b/defaults.xml
index 373778f62..0d7857caf 100644
--- a/defaults.xml
+++ b/defaults.xml
@@ -58,6 +58,9 @@ Started September 2000 by David Megginson, david@megginson.com
         <enabled type="bool" userarchive="y">false</enabled>
         <sun-atlas-size type="int" userarchive="y">2048</sun-atlas-size>
       </shadows>
+      <clustered-shading>
+        <enabled type="bool" userarchive="y">false</enabled>
+      </clustered-shading>
       <photoscenery>
         <enabled type="bool" userarchive="y">false</enabled>
       </photoscenery>