From 48768ee9d2d79957de25fb1ad458dc409f826635 Mon Sep 17 00:00:00 2001
From: Thorsten Renk <thorsten@science-and-fiction.org>
Date: Wed, 5 Apr 2017 16:50:31 +0300
Subject: [PATCH] Earthview 2.1 - parallax mapping for cloud layer, lightning
 at night, Rayleigh scattering in atmosphere and minor bugfixes

---
 Effects/planet-aurora.eff             |   28 +-
 Effects/planet-cloudlayer.eff         |   49 +-
 Effects/planet.eff                    |   31 +-
 Models/Astro/Effects/aurora_inner.eff |    9 +
 Models/Astro/aurora.xml               |   60 +-
 Models/Astro/aurora_inner.xml         |   43 +
 Models/Astro/aurora_outer.xml         |   49 +
 Models/Astro/aurora_projection.ac     | 3670 ++++++++++++-------------
 Nasal/earthview.nas                   |  104 +-
 Shaders/planet-aurora.frag            |    6 +-
 Shaders/planet-aurora.vert            |   15 +-
 Shaders/planet-cloudlayer.frag        |   75 +-
 Shaders/planet-high.frag              |   27 +-
 Shaders/planet.frag                   |   15 +-
 defaults.xml                          |    3 +
 gui/dialogs/earthview.xml             |   36 +
 16 files changed, 2257 insertions(+), 1963 deletions(-)
 create mode 100755 Models/Astro/Effects/aurora_inner.eff
 create mode 100755 Models/Astro/aurora_inner.xml
 create mode 100755 Models/Astro/aurora_outer.xml

diff --git a/Effects/planet-aurora.eff b/Effects/planet-aurora.eff
index fd740e277..c404de5a6 100644
--- a/Effects/planet-aurora.eff
+++ b/Effects/planet-aurora.eff
@@ -17,15 +17,16 @@
 		<patchiness><use>/environment/aurora/patchiness</use></patchiness>
 		<afterglow><use>/environment/aurora/afterglow</use></afterglow>
 		<use_filtering><use>/sim/rendering/als-filters/use-filtering</use></use_filtering>
-    		<gamma><use>/sim/rendering/als-filters/gamma</use></gamma>
-    		<brightness><use>/sim/rendering/als-filters/brightness</use></brightness>
-    		<delta_T><use>/environment/surface/delta-T-cloud</use></delta_T>
+    	<gamma><use>/sim/rendering/als-filters/gamma</use></gamma>
+    	<brightness><use>/sim/rendering/als-filters/brightness</use></brightness>
+    	<delta_T><use>/environment/surface/delta-T-cloud</use></delta_T>
 		<fact_grey><use>/sim/rendering/als-filters/grey-factor</use></fact_grey>
-    	        <fact_black><use>/sim/rendering/als-filters/black-factor</use></fact_black>
-    		<use_night_vision><use>/sim/rendering/als-filters/use-night-vision</use></use_night_vision>
-    		<use_IR_vision><use>/sim/rendering/als-filters/use-IR-vision</use></use_IR_vision>
-    		<display_xsize><use>/sim/startup/xsize</use></display_xsize>
-    		<display_ysize><use>/sim/startup/ysize</use></display_ysize>
+    	<fact_black><use>/sim/rendering/als-filters/black-factor</use></fact_black>
+		<use_night_vision><use>/sim/rendering/als-filters/use-night-vision</use></use_night_vision>
+    	<use_IR_vision><use>/sim/rendering/als-filters/use-IR-vision</use></use_IR_vision>
+    	<display_xsize><use>/sim/startup/xsize</use></display_xsize>
+    	<display_ysize><use>/sim/startup/ysize</use></display_ysize>
+		<arc_id>0.0</arc_id>
 	</parameters>
 
  
@@ -77,9 +78,9 @@
 			<shade-model>
 				<use>shade-model</use>
 			</shade-model>
-			<cull-face>
+			<!--<cull-face>
 				<use>cull-face</use>
-			</cull-face>
+			</cull-face>-->
 			<rendering-hint>
 				<use>rendering-hint</use>
 			</rendering-hint>
@@ -87,7 +88,7 @@
         			<write-mask>false</write-mask>
       			</depth>
       			<render-bin>
-        			<bin-number>10</bin-number>
+        			<bin-number>111</bin-number>
         			<bin-name>DepthSortedBin</bin-name>
      			 </render-bin>
 			<texture-unit>
@@ -164,6 +165,11 @@
 				<type>float</type>
 				<value><use>brightness</use></value>
 			 </uniform>
+			 <uniform>
+				<name>arc_id</name>
+				<type>float</type>
+				<value><use>arc_id</use></value>
+			 </uniform>
 			 <uniform>
 				<name>use_filtering</name>
 				<type>bool</type>
diff --git a/Effects/planet-cloudlayer.eff b/Effects/planet-cloudlayer.eff
index 91debda5c..ae2b354f4 100644
--- a/Effects/planet-cloudlayer.eff
+++ b/Effects/planet-cloudlayer.eff
@@ -23,17 +23,21 @@
 		<use-cloud-normals><use>/earthview/cloud-normal-flag</use></use-cloud-normals>
 		<shade-effect><use>/earthview/shade-effect</use></shade-effect>
 		<sun-angle><use>/sim/time/sun-angle-rad</use></sun-angle>
-    		<air_pollution><use>/environment/air-pollution-norm</use></air_pollution>
+    	<air_pollution><use>/environment/air-pollution-norm</use></air_pollution>
+		<roi_x1><use>/earthview/roi-x1</use></roi_x1>
+		<roi_y1><use>/earthview/roi-y1</use></roi_y1>
+		<lightning><use>/earthview/lightning</use></lightning>
 		<use_filtering><use>/sim/rendering/als-filters/use-filtering</use></use_filtering>
-    		<gamma><use>/sim/rendering/als-filters/gamma</use></gamma>
-    		<brightness><use>/sim/rendering/als-filters/brightness</use></brightness>
-    		<delta_T><use>/environment/surface/delta-T-cloud</use></delta_T>
+    	<gamma><use>/sim/rendering/als-filters/gamma</use></gamma>
+    	<brightness><use>/sim/rendering/als-filters/brightness</use></brightness>
+    	<delta_T><use>/environment/surface/delta-T-cloud</use></delta_T>
 		<fact_grey><use>/sim/rendering/als-filters/grey-factor</use></fact_grey>
-    	        <fact_black><use>/sim/rendering/als-filters/black-factor</use></fact_black>
-    		<use_night_vision><use>/sim/rendering/als-filters/use-night-vision</use></use_night_vision>
-    		<use_IR_vision><use>/sim/rendering/als-filters/use-IR-vision</use></use_IR_vision>
-    		<display_xsize><use>/sim/startup/xsize</use></display_xsize>
-    		<display_ysize><use>/sim/startup/ysize</use></display_ysize>
+    	<fact_black><use>/sim/rendering/als-filters/black-factor</use></fact_black>
+    	<use_night_vision><use>/sim/rendering/als-filters/use-night-vision</use></use_night_vision>
+    	<use_IR_vision><use>/sim/rendering/als-filters/use-IR-vision</use></use_IR_vision>
+    	<display_xsize><use>/sim/startup/xsize</use></display_xsize>
+    	<display_ysize><use>/sim/startup/ysize</use></display_ysize>
+
 	</parameters>
 	<generate>
 		<normal type="int">15</normal>
@@ -161,7 +165,7 @@
 				<value>
 					<use>use-cloud-normals</use>
 				</value>
-			</uniform>
+			</uniform>			
 			<uniform>
 				<name>colorMode</name>
 				<type>int</type>
@@ -183,11 +187,11 @@
 					<use>shade-effect</use>
 				</value>
 			</uniform>
-      			<uniform>
+      		<uniform>
         			 <name>air_pollution</name>
         			 <type>float</type>
         			 <value><use>air_pollution</use></value>
-      			</uniform>
+      		</uniform>
 			<uniform>
 				<name>sun_angle</name>
 				<type>float</type>
@@ -195,6 +199,27 @@
 					<use>sun-angle</use>
 				</value>
 			</uniform>
+			<uniform>
+				<name>lightning</name>
+				<type>float</type>
+				<value>
+					<use>lightning</use>
+				</value>
+			</uniform>
+			<uniform>
+				<name>roi_x1</name>
+				<type>float</type>
+				<value>
+					<use>roi_x1</use>
+				</value>
+			</uniform>
+			<uniform>
+				<name>roi_y1</name>
+				<type>float</type>
+				<value>
+					<use>roi_y1</use>
+				</value>
+			</uniform>
 			<uniform>
 				<name>gamma</name>
 				<type>float</type>
diff --git a/Effects/planet.eff b/Effects/planet.eff
index 28c65a9c4..5ee7549aa 100644
--- a/Effects/planet.eff
+++ b/Effects/planet.eff
@@ -35,20 +35,21 @@
 			<!-- DIFFUSE -->
 		</material>
 		<visibility><use>/environment/visibility-m</use></visibility>
+		<air_pollution><use>/environment/air-pollution-norm</use></air_pollution>
 		<use-clouds><use>/earthview/cloudsphere-flag</use></use-clouds>
 		<use-cloud-shadows><use>/earthview/cloud-shadow-flag</use></use-cloud-shadows>
 		<use-overlay-textures><use>/earthview/overlay-texture-flag</use></use-overlay-textures>
 		<sun-angle><use>/sim/time/sun-angle-rad</use></sun-angle>
 		<use_filtering><use>/sim/rendering/als-filters/use-filtering</use></use_filtering>
-    		<gamma><use>/sim/rendering/als-filters/gamma</use></gamma>
-    		<brightness><use>/sim/rendering/als-filters/brightness</use></brightness>
-    		<delta_T><use>/environment/surface/delta-T-cloud</use></delta_T>
+		<gamma><use>/sim/rendering/als-filters/gamma</use></gamma>
+    	<brightness><use>/sim/rendering/als-filters/brightness</use></brightness>
+    	<delta_T><use>/environment/surface/delta-T-cloud</use></delta_T>
 		<fact_grey><use>/sim/rendering/als-filters/grey-factor</use></fact_grey>
-    	        <fact_black><use>/sim/rendering/als-filters/black-factor</use></fact_black>
-    		<use_night_vision><use>/sim/rendering/als-filters/use-night-vision</use></use_night_vision>
-    		<use_IR_vision><use>/sim/rendering/als-filters/use-IR-vision</use></use_IR_vision>
-    		<display_xsize><use>/sim/startup/xsize</use></display_xsize>
-    		<display_ysize><use>/sim/startup/ysize</use></display_ysize>
+    	<fact_black><use>/sim/rendering/als-filters/black-factor</use></fact_black>
+    	<use_night_vision><use>/sim/rendering/als-filters/use-night-vision</use></use_night_vision>
+    	<use_IR_vision><use>/sim/rendering/als-filters/use-IR-vision</use></use_IR_vision>
+    	<display_xsize><use>/sim/startup/xsize</use></display_xsize>
+    	<display_ysize><use>/sim/startup/ysize</use></display_ysize>
 	</parameters>
 	<generate>
 		<normal type="int">15</normal>
@@ -196,6 +197,13 @@
 					<use>visibility</use>
 				</value>
 			</uniform>
+			<uniform>
+				<name>air_pollution</name>
+				<type>float</type>
+				<value>
+					<use>air_pollution</use>
+				</value>
+			</uniform>
 			<uniform>
 				<name>sun_angle</name>
 				<type>float</type>
@@ -412,6 +420,13 @@
 					<use>visibility</use>
 				</value>
 			</uniform>
+			<uniform>
+				<name>air_pollution</name>
+				<type>float</type>
+				<value>
+					<use>air_pollution</use>
+				</value>
+			</uniform>
 			<uniform>
 				<name>sun_angle</name>
 				<type>float</type>
diff --git a/Models/Astro/Effects/aurora_inner.eff b/Models/Astro/Effects/aurora_inner.eff
new file mode 100755
index 000000000..63bad8f54
--- /dev/null
+++ b/Models/Astro/Effects/aurora_inner.eff
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<PropertyList>
+  <name>aurora_inner</name>
+  <inherits-from>Effects/planet-aurora</inherits-from>
+  <parameters>
+    <arc_id>1.0</arc_id>
+  </parameters>
+</PropertyList>
\ No newline at end of file
diff --git a/Models/Astro/aurora.xml b/Models/Astro/aurora.xml
index c5ed33c62..87fc58b43 100644
--- a/Models/Astro/aurora.xml
+++ b/Models/Astro/aurora.xml
@@ -1,49 +1,11 @@
-<?xml version="1.0"?>
-
-<PropertyList>
- <path>aurora_projection.ac</path>
-
-
- <animation>
-  <type>scale</type>
-  <x-offset>58030</x-offset>
-  <y-offset>58030</y-offset>
-  <z-offset>58030</z-offset>
- </animation>
-
-
- <animation>
-   <enable-hot type="bool">false</enable-hot>
- </animation>
-
- 
-
- <animation>
-  <type>rotate</type>
-  <property>/earthview/yaw-deg</property>
-  <factor>1</factor>
-  <offset-deg>0</offset-deg>
-  <center>
-   <x-m>0</x-m>
-   <y-m>0</y-m>
-   <z-m>0</z-m>
-  </center>
-  <axis>
-   <x>0</x>
-   <y>0</y>
-   <z>1</z>
-  </axis>
- </animation>
-
- <effect>
-   <inherits-from>Effects/planet-aurora</inherits-from>
-   <object-name>aurora</object-name>
-</effect>
-
-
-
-
-
-
-
-</PropertyList>
+<?xml version="1.0"?>
+
+<PropertyList>
+ <model>
+	<path>aurora_inner.xml</path>
+ </model>
+ <model>
+	<path>aurora_outer.xml</path>
+ </model>
+ 
+ </PropertyList>
diff --git a/Models/Astro/aurora_inner.xml b/Models/Astro/aurora_inner.xml
new file mode 100755
index 000000000..200df0326
--- /dev/null
+++ b/Models/Astro/aurora_inner.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0"?>
+
+<PropertyList>
+ <path>aurora_projection.ac</path>
+
+
+ <animation>
+  <type>scale</type>
+  <x-offset>51030</x-offset>
+  <y-offset>51030</y-offset>
+  <z-offset>58030</z-offset>
+ </animation>
+
+
+ <animation>
+   <enable-hot type="bool">false</enable-hot>
+ </animation>
+
+ 
+
+ <animation>
+  <type>rotate</type>
+  <property>/earthview/yaw-deg</property>
+  <factor>1</factor>
+  <offset-deg>0</offset-deg>
+  <center>
+   <x-m>0</x-m>
+   <y-m>0</y-m>
+   <z-m>0</z-m>
+  </center>
+  <axis>
+   <x>0</x>
+   <y>0</y>
+   <z>1</z>
+  </axis>
+ </animation>
+
+ <effect>
+   <inherits-from>Models/Astro/Effects/aurora_inner</inherits-from>
+   <object-name>aurora</object-name>
+</effect>
+
+</PropertyList>
\ No newline at end of file
diff --git a/Models/Astro/aurora_outer.xml b/Models/Astro/aurora_outer.xml
new file mode 100755
index 000000000..313cd3550
--- /dev/null
+++ b/Models/Astro/aurora_outer.xml
@@ -0,0 +1,49 @@
+<?xml version="1.0"?>
+
+<PropertyList>
+ <path>aurora_projection.ac</path>
+
+
+ <animation>
+  <type>scale</type>
+  <x-offset>58030</x-offset>
+  <y-offset>58030</y-offset>
+  <z-offset>58030</z-offset>
+ </animation>
+
+
+ <animation>
+   <enable-hot type="bool">false</enable-hot>
+ </animation>
+
+ 
+
+ <animation>
+  <type>rotate</type>
+  <property>/earthview/yaw-deg</property>
+  <factor>1</factor>
+  <offset-deg>0</offset-deg>
+  <center>
+   <x-m>0</x-m>
+   <y-m>0</y-m>
+   <z-m>0</z-m>
+  </center>
+  <axis>
+   <x>0</x>
+   <y>0</y>
+   <z>1</z>
+  </axis>
+ </animation>
+
+ <effect>
+   <inherits-from>Effects/planet-aurora</inherits-from>
+   <object-name>aurora</object-name>
+</effect>
+
+
+
+
+
+
+
+</PropertyList>
diff --git a/Models/Astro/aurora_projection.ac b/Models/Astro/aurora_projection.ac
index 3bff43fca..f484aa134 100644
--- a/Models/Astro/aurora_projection.ac
+++ b/Models/Astro/aurora_projection.ac
@@ -1,1835 +1,1835 @@
-AC3Db
-MATERIAL "DefaultWhite" rgb 1.0000 1.0000 1.0000  amb 0.2000 0.2000 0.2000  emis 0.0000 0.0000 0.0000  spec 0.5000 0.5000 0.5000  shi 10 trans 0.0000
-MATERIAL "AuroraBase" rgb 0.8000 0.8000 0.8000  amb 1.0000 1.0000 1.0000  emis 0.0000 0.0000 0.0000  spec 0.5000 0.5000 0.5000  shi 50 trans 1.0000
-OBJECT world
-name "Blender_export__aurora_projection.ac"
-kids 1
-OBJECT poly
-name "aurora"
-numvert 256
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--0.3533358 0.1571433 -0.1896514
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diff --git a/Nasal/earthview.nas b/Nasal/earthview.nas
index 6f74d42d6..0d5860997 100644
--- a/Nasal/earthview.nas
+++ b/Nasal/earthview.nas
@@ -2,6 +2,39 @@
 # Earthview orbital rendering
 ###########################################################
 
+
+var lightning_table = [];
+
+var entry = [2.85, 30.28, 0.35, 0.045];
+append(lightning_table, entry);
+
+entry = [9.3,8.0,0.1, 0.105];
+append(lightning_table, entry);
+
+entry = [6.0, -72.0, 0.2, 0.09];
+append(lightning_table, entry);
+
+entry = [30.89, -112.0, 0.72, 0.34];
+append(lightning_table, entry);
+
+
+var check_lightning_table = func (lat, lon) {
+
+for (var i=0; i< size(lightning_table); i=i+1)
+	{
+	if (math.abs(lat - lightning_table[i][0]) < 15.0)
+		{
+		if (math.abs(lon - lightning_table[i][1]) < 15.0)
+			{
+			return i;
+			}
+		}
+	}
+return -1;
+
+}
+
+
 var start = func() {
 
 if (earthview_running_flag ==1) {return;}
@@ -75,7 +108,7 @@ setprop("/environment/visibility-m", 80000.0);
 setprop("/sim/rendering/mie", 0.0);
 setprop("/sim/rendering/rayleigh", 0.00002);
 setprop("/sim/rendering/dome-density", 1.0);
-setprop("/earthview/shade-effect", 1.5);
+setprop("/earthview/shade-effect", 0.5);
 
 earth_model.l1 = setlistener("/earthview/show-n1", func(n) {load_sector (1, n);},0,0);
 earth_model.l2 = setlistener("/earthview/show-n2", func(n) {load_sector (2, n);},0,0);
@@ -89,6 +122,8 @@ earth_model.l8 = setlistener("/earthview/show-s4", func(n) {load_sector (8, n);}
 
 control_loop();
 
+slow_loop();
+
 }
 
 var stop = func () {
@@ -289,6 +324,71 @@ if (getprop("/earthview/control_loop_flag") ==1) {settimer( func {control_loop()
 }
 
 
+var slow_loop = func {
+
+if (earthview_running_flag == 0) {return;}
+
+# thunderstorms
+
+var lat = getprop("/position/latitude-deg");
+var lon = getprop("/position/longitude-deg") + getprop("/earthview/cloudsphere-angle");
+
+
+var index = check_lightning_table(lat, lon);
+
+if (index > -1)
+	{
+	
+	
+	rn = rand();
+
+	if (rn < 0.3)
+		{
+		var roi_x_base = lightning_table[index][2];
+		var roi_y_base = lightning_table[index][3];
+	
+		var rn = 0.005 * (2.0 * rand() - 0.5);
+		setprop("/earthview/roi-x1", roi_x_base + rn);
+	
+		rn = 0.005 * (2.0 * rand() - 0.5);
+		setprop("/earthview/roi-y1", roi_y_base + rn);
+		
+		
+		lightning_strike();
+		
+		}
+	}
+
+if (getprop("/earthview/control_loop_flag") ==1) {settimer( func {slow_loop(); },1.0);}
+}
+
+
+
+var lightning_strike = func {
+
+var rn = rand();
+
+var repeat = 1;
+
+if (rn > 0.5) {repeat = 2;}
+
+var duration = 0.1 + 0.1 * rand();
+var strength = 0.5 + 1.0 * rand();
+
+setprop("/earthview/lightning", strength);
+settimer( func{ setprop("/earthview/lightning", 0.0);}, duration);
+
+var duration1 = 0.1 +  0.1 * rand();
+
+if (repeat == 2)
+	{
+	settimer( func{ setprop("/earthview/lightning", strength);}, duration + 0.1);
+	settimer( func{ setprop("/earthview/lightning", 0.0);}, duration + 0.1 + duration1);
+	}
+
+}
+
+
 # rotate position of cloud tiles
 
 var adjust_cloud_tiles = func {
@@ -370,7 +470,7 @@ if (action)
 	{
 	var lat = getprop("/position/latitude-deg");
 	var lon = getprop("/position/longitude-deg");
-
+	
 	if (i==1)
 		{
 		earth_model.node1 = place_earth_model("Models/Astro/earth_N1.xml",lat, lon, 0.0, 0.0, 0.0, 0.0);
diff --git a/Shaders/planet-aurora.frag b/Shaders/planet-aurora.frag
index a72a5f195..b05804701 100644
--- a/Shaders/planet-aurora.frag
+++ b/Shaders/planet-aurora.frag
@@ -14,6 +14,7 @@ uniform float upper_alt_factor;
 uniform float penetration_factor;
 uniform float patchiness;
 uniform float afterglow;
+uniform float arc_id;
 uniform float osg_SimulationTime;
 
 float Noise2D(in vec2 coord, in float wavelength);
@@ -23,11 +24,12 @@ void main()
 {
 
 
-float vCoord = abs(vertex.z);
+
+float vCoord = abs(vertex.z) - 0.02 * arc_id;
 
 
 
-float aurora_time = 0.001 * osg_SimulationTime;  
+float aurora_time = 0.001 * osg_SimulationTime + arc_id;  
 
 float noise_01 = Noise2D( vec2(vertex.x +aurora_time, vertex.y), 0.05);
 float blend_factor = smoothstep(0.935, 0.955, vCoord - 0.001 * noise_01 - 0.02 * (1.0-upper_alt_factor));
diff --git a/Shaders/planet-aurora.vert b/Shaders/planet-aurora.vert
index 3b18c3339..d976311fd 100644
--- a/Shaders/planet-aurora.vert
+++ b/Shaders/planet-aurora.vert
@@ -4,6 +4,10 @@ varying vec3 vertex;
 varying vec3 normal;
 varying vec3 relVec;
 
+uniform float osg_SimulationTime;
+uniform float arc_id;
+
+
 void main()
 {
 	
@@ -11,5 +15,14 @@ void main()
     vertex = gl_Vertex.xyz;
     vec3 ep = (gl_ModelViewMatrixInverse * vec4 (0.0, 0.0, 0.0, 1.0)).xyz;
     relVec = vertex - ep;
-    gl_Position = ftransform();
+	
+	vec4 vert_out = gl_Vertex;
+	
+	float ang = dot(vert_out.xy, vec2 (0.0, 1.0));
+	
+	vert_out.x *= (1.0 + 0.05 * sin(ang + 0.1 * osg_SimulationTime + arc_id));
+	vert_out.y *= (1.0 + 0.05 * sin(ang + 0.12 * osg_SimulationTime + arc_id));
+
+	
+	gl_Position = gl_ModelViewProjectionMatrix * vert_out;
 }
diff --git a/Shaders/planet-cloudlayer.frag b/Shaders/planet-cloudlayer.frag
index 5663eb575..451586fbe 100644
--- a/Shaders/planet-cloudlayer.frag
+++ b/Shaders/planet-cloudlayer.frag
@@ -12,6 +12,10 @@ uniform float shade_effect;
 uniform float sun_angle;
 uniform float air_pollution;
 
+uniform float roi_x1;
+uniform float roi_y1;
+uniform float lightning;
+
 uniform bool use_overlay;
 uniform bool use_cloud_normals;
 
@@ -32,6 +36,17 @@ return cos1 * cos2 + sign *  sin1 * sin2;
 
 }
 
+vec3 lightning_color (in vec2 coord)
+{
+
+vec2 roi1 = vec2 (roi_x1, roi_y1);
+
+float strength = 1.0 - smoothstep(0.0, 0.005, length(roi1 - coord));
+
+return strength * vec3 (0.43, 0.57, 1.0);
+
+}
+
 
 void main()
 {
@@ -71,27 +86,46 @@ void main()
     vec3 binormal = cross(n, tangent);
     float NdotL2 = 0.0;
 
+	texel = texture2D(texture, gl_TexCoord[0].st);
+    ref_texel = texel;
+	
    if (use_cloud_normals)
 	{
-   	vec2 sun2d = vec2 (0.0, 1.0);
+		vec2 sun2d = vec2 (0.0, 1.0);
 
-  	float xOffset = -1.0 * dot(normalize(lightDir), tangent);
-   	float yOffset = -1.0 * dot(normalize(lightDir), binormal);	
+		float xOffset = -1.0 * dot(normalize(lightDir), tangent);
+		float yOffset = -1.0 * dot(normalize(lightDir), binormal);	
+		
+		grad_dir = normalize (vec2 (xOffset, yOffset));
+
+		vec4 comp_texel = texture2D(texture, gl_TexCoord[0].st - 0.0005 * grad_dir);
+		
+		// parallax mapping
+			
+		xOffset = -1.0 * dot(ecViewDir, tangent);
+		yOffset = -1.0 * dot(ecViewDir, binormal);	
+			
+		grad_dir = normalize (vec2 (xOffset, yOffset));
+
+		texel = texture2D(texture, gl_TexCoord[0].st - 0.0005 * grad_dir * ref_texel.a * 0.7);
+		
+		// relief shading based on gradient and parallax lookup
+		
+		float slope = shade_effect * (comp_texel.a - ref_texel.a) * texel.a;
+		float sign = -1.0;
+		if (slope < 0.0) {sign = 1.0;}
+		
+		vec2 snormal = normalize(vec2 (slope, 1.0));
+
+		NdotL2 = dot (snormal, sun2d);
+		NdotL = add_cosines(NdotL, NdotL2, sign );
+		
 	
-	grad_dir = normalize (vec2 (xOffset, yOffset));
 
-	vec4 comp_texel = texture2D(texture, gl_TexCoord[0].st - 0.0005 * grad_dir);
-
-	float slope = shade_effect * (comp_texel.a - ref_texel.a);
-	float sign = -1.0;
-	if (slope < 0.0) {sign = 1.0;}
-	
-	vec2 snormal = normalize(vec2 (slope, 1.0));
-
-	NdotL2 = dot (snormal, sun2d);
-    	NdotL = add_cosines(NdotL, NdotL2, sign );
+			
 	}
 
+	
         color += diff_term * max(NdotL, 0.15) ;
 
 
@@ -101,15 +135,13 @@ void main()
 	color.rgb *= smoothstep(-0.2, -0.1, NdotLraw);
 	//
 	
+	float darkness_fact = 1.0 - smoothstep(0.0,0.2, length(color.rgb));
+	color.rgb += lightning_color(gl_TexCoord[0].st) * (1.0 - texel.a) * lightning * darkness_fact;
 	
     
-    color.a = diffuse_term.a;
+    color.a = 1.0;//diffuse_term.a;
     color = clamp(color, 0.0, 1.0);
-    texel = texture2D(texture, gl_TexCoord[0].st);
-
-
-
-    ref_texel = texel;
+ 
     structureTexel = texture2D(structure_texture, 20.0 * gl_TexCoord[0].st);
 
     float noise = Noise2D( gl_TexCoord[0].st, 0.01);
@@ -127,6 +159,9 @@ void main()
 	{
 	texel = vec4(structureTexel.rgb, smoothstep(0.0, 0.5,texel.a) * structureTexel.a);
 	}
+	
+	
+	texel.a = clamp((1.0 + darkness_fact) * texel.a, 0.0, 1.0);
 
 
     fragColor = color * texel;
diff --git a/Shaders/planet-high.frag b/Shaders/planet-high.frag
index 3e206aaf0..5a423a8bd 100644
--- a/Shaders/planet-high.frag
+++ b/Shaders/planet-high.frag
@@ -9,6 +9,7 @@ varying vec3 ecViewDir;
 varying vec3 VTangent;
 
 uniform float visibility;
+uniform float air_pollution;
 uniform float sun_angle;
 uniform bool use_clouds;
 uniform bool use_cloud_shadows;
@@ -75,9 +76,9 @@ void main()
     NdotL = dot(N, lightDir);
     float NdotLraw = NdotL;
     // due to atmosphere scattering, we should make this harder
-    NdotL = smoothstep(-0.2,0.2,NdotL);	
+    NdotL = smoothstep(-0.2 ,0.2,NdotL);	
     // fog does not feel normal map
-    float NdotLfog = smoothstep(-0.2, 0.2, dot(n, lightDir));
+    float NdotLfog = smoothstep(-0.2 , 0.2, dot(n, lightDir));
    
     float intensity = length(diffuse_term);
     vec4 dawn = intensity * normalize (vec4 (1.0,0.5,0.3,1.0));
@@ -116,7 +117,6 @@ void main()
     color.a = diffuse_term.a;
 
 
-
     // This shouldn't be necessary, but our lighting becomes very
     // saturated. Clamping the color before modulating by the texture
     // is closer to what the OpenGL fixed function pipeline does.
@@ -140,19 +140,16 @@ void main()
 	float angle = dot(normalize(ecViewDir), normalize(normal));
 	float distance_through_atmosphere = min(10.0 / (abs(angle)+0.001),500.0);
 
-
-	float correction = smoothstep(-0.4, 0.0, dot(n, lightDir) - 0.45  ) ;
-	//correction = correction + (1.0 - correction) * (1.0 - smoothstep(1.40, 1.57, sun_angle));
-	float correction1 = 1.0 - smoothstep(1.4, 1.45, sun_angle);
-	correction1 = 1.0;
-
-	//vec4 fogColor = vec4 (0.83,0.9,1.0,1.0) * clamp(length(diffuse_term.rgb/1.73 *  correction * clamp(NdotL + correction1,0.01, 0.99) ),0.0,1.0);
-
-	vec4 fogColor = vec4 (0.83,0.9,1.0,1.0) * clamp(smoothstep(0.4, 1.0,NdotLfog),0.0,1.0) * length(diff_term.rgb/1.73);
-
+   
+	float fogLighting = clamp(NdotLfog,0.0,1.0) * length(diff_term.rgb/1.73);
+	
+	vec4 fogColor = vec4 (0.83,0.9,1.0,1.0) * fogLighting;
+	vec3 rayleighColor = vec3 (0.17, 0.52, 0.87) * fogLighting;
+		
 	float fogFactor = exp(-distance_through_atmosphere/(visibility/1000.0));
-
-
+	float rayleighFactor = exp(-distance_through_atmosphere/(300.0 / (1.0 + 4.0 * air_pollution)) );
+  
+    fragColor.rgb = mix(rayleighColor, fragColor.rgb, rayleighFactor);
 	fragColor = mix(fogColor, fragColor, fogFactor);
 
 	fragColor.rgb = filter_combined(fragColor.rgb);
diff --git a/Shaders/planet.frag b/Shaders/planet.frag
index 707625959..6c42d5421 100644
--- a/Shaders/planet.frag
+++ b/Shaders/planet.frag
@@ -9,6 +9,7 @@ varying vec3 ecViewDir;
 varying vec3 VTangent;
 
 uniform float visibility;
+uniform float air_pollution;
 uniform float sun_angle;
 uniform bool use_clouds;
 uniform bool use_cloud_shadows;
@@ -130,19 +131,17 @@ void main()
 	float angle = dot(normalize(ecViewDir), normalize(normal));
 	float distance_through_atmosphere = min(10.0 / (abs(angle)+0.001),500.0);
 
+	float fogLighting = clamp(NdotL,0.0,1.0) * length(diff_term.rgb/1.73);
 
-	float correction = smoothstep(-0.4, 0.0, dot(n, lightDir) - 0.45  ) ;
-	//correction = correction + (1.0 - correction) * (1.0 - smoothstep(1.40, 1.57, sun_angle));
-	float correction1 = 1.0 - smoothstep(1.4, 1.45, sun_angle);
-	correction1 = 1.0;
 
-	//vec4 fogColor = vec4 (0.83,0.9,1.0,1.0) * clamp(length(diffuse_term.rgb/1.73 *  correction * clamp(NdotL + correction1,0.01, 0.99) ),0.0,1.0);
-
-	vec4 fogColor = vec4 (0.83,0.9,1.0,1.0) * clamp(smoothstep(0.4, 1.0,NdotL),0.0,1.0) * length(diff_term.rgb/1.73);
+	vec4 fogColor = vec4 (0.83,0.9,1.0,1.0) * fogLighting;
+	vec3 rayleighColor = vec3 (0.17, 0.52, 0.87) * fogLighting;
 
+	
 	float fogFactor = exp(-distance_through_atmosphere/(visibility/1000.0));
+	float rayleighFactor = exp(-distance_through_atmosphere/(300.0 / (1.0 + 4.0 * air_pollution)) );
 
-
+    fragColor.rgb = mix(rayleighColor, fragColor.rgb, rayleighFactor);
 	fragColor = mix(fogColor, fragColor, fogFactor);
 
 	fragColor.rgb = filter_combined(fragColor.rgb);
diff --git a/defaults.xml b/defaults.xml
index d38d98cd6..113f4aa52 100644
--- a/defaults.xml
+++ b/defaults.xml
@@ -1369,6 +1369,9 @@ Started September 2000 by David Megginson, david@megginson.com
     <show-dummy type="bool" userarchive="n">false</show-dummy>
     <normal-flag type="bool" userarchive="y">false</normal-flag>
     <cloud-normal-flag type="bool" userarchive="y">false</cloud-normal-flag>
+    <roi-x1 type="float" userarchive="n">0.0</roi-x1>
+    <roi-y1 type="float" userarchive="n">0.0</roi-y1>
+    <lightning type="float" userarchive="n">0.0</lightning>
   </earthview>
 </PropertyList>
 <!-- end of preferences.xml -->
diff --git a/gui/dialogs/earthview.xml b/gui/dialogs/earthview.xml
index 4d9671684..63ee65042 100644
--- a/gui/dialogs/earthview.xml
+++ b/gui/dialogs/earthview.xml
@@ -395,6 +395,42 @@
 			<live>true</live>
 			<property>/environment/visibility-m</property>
 		</text>
+		
+	<text>
+      <label>  </label>
+    </text>
+		
+	</group>
+
+	<group>
+		<layout>hbox</layout>
+		<halign>right</halign>
+		
+    <!-- gap -->
+    <text>
+      <label>  </label>
+    </text>
+
+		<text>
+			<label>Relative dust density</label>
+		</text>
+		<slider>
+			<name>air_pollution</name>
+			<min>0.0</min>
+			<max>1.0</max>
+			<property>/environment/air-pollution-norm</property>
+			<binding>
+				<command>dialog-apply</command>
+				<object-name>air_pollution</object-name>
+			</binding>
+			<live>true</live>
+		</slider>
+		<text>
+			<label>12345678</label>
+			<format>%.1f</format>
+			<live>true</live>
+			<property>/environment/air-pollution-norm</property>
+		</text>
 
     <!-- gap -->
     <text>