diff --git a/Effects/airfield.eff b/Effects/airfield.eff
index fc54e445f..d344d7612 100644
--- a/Effects/airfield.eff
+++ b/Effects/airfield.eff
@@ -122,6 +122,7 @@
 	<fragment-shader>Shaders/noise.frag</fragment-shader>
 	<fragment-shader>Shaders/hazes.frag</fragment-shader>
 	<fragment-shader>Shaders/secondary_lights.frag</fragment-shader>
+        <fragment-shader>Shaders/filters-ALS.frag</fragment-shader>
       </program>
       <uniform>
         <name>visibility</name>
@@ -238,6 +239,7 @@
         <type>float</type>
         <value><use>season</use></value>
       </uniform>
+      <!-- secondary lights -->
       <uniform>
         <name>view_pitch_offset</name>
         <type>float</type>
@@ -268,6 +270,38 @@
         <type>float</type>
         <value><use>landing_light3_offset</use></value>
       </uniform>
+      <!-- filtering -->
+      <uniform>
+        <name>gamma</name>
+        <type>float</type>
+        <value><use>gamma</use></value>
+      </uniform>
+      <uniform>
+        <name>brightness</name>
+        <type>float</type>
+        <value><use>brightness</use></value>
+      </uniform>
+      <uniform>
+        <name>use_night_vision</name>
+        <type>bool</type>
+        <value><use>use_night_vision</use></value>
+      </uniform>
+      <uniform>
+        <name>use_IR_vision</name>
+        <type>bool</type>
+        <value><use>use_IR_vision</use></value>
+      </uniform>
+      <uniform>
+        <name>use_filtering</name>
+        <type>bool</type>
+        <value><use>use_filtering</use></value>
+      </uniform>
+      <uniform>
+        <name>delta_T</name>
+        <type>float</type>
+        <value><use>delta_T</use></value>
+      </uniform>
+      <!-- cloud shadows -->
       <uniform>
         <name>cloudpos1_x</name>
         <type>float</type>
diff --git a/Effects/dirt-runway.eff b/Effects/dirt-runway.eff
index f53144879..3ac13231b 100644
--- a/Effects/dirt-runway.eff
+++ b/Effects/dirt-runway.eff
@@ -138,12 +138,12 @@
         <internal-format><use>texture[11]/internal-format</use></internal-format>
       </texture-unit>
       <program>
-        <vertex-shader n="1">Shaders/terrain-ALS-ultra.vert</vertex-shader>
-        <fragment-shader n="1">Shaders/drunway-ALS.frag</fragment-shader>        
-	<fragment-shader n="2">Shaders/cloud-shadowfunc.frag</fragment-shader>
-	<fragment-shader n="3">Shaders/noise.frag</fragment-shader>
-	<fragment-shader n="4">Shaders/hazes.frag</fragment-shader>
-	<fragment-shader n="5">Shaders/secondary_lights.frag</fragment-shader>
+        <vertex-shader n="0">Shaders/terrain-ALS-ultra.vert</vertex-shader>
+        <fragment-shader n="0">Shaders/drunway-ALS.frag</fragment-shader>        
+	<fragment-shader n="1">Shaders/cloud-shadowfunc.frag</fragment-shader>
+	<fragment-shader n="2">Shaders/noise.frag</fragment-shader>
+	<fragment-shader n="3">Shaders/hazes.frag</fragment-shader>
+	<fragment-shader n="4">Shaders/secondary_lights.frag</fragment-shader>
       </program>
       <uniform>
         <name>visibility</name>
diff --git a/Effects/model-combined.eff b/Effects/model-combined.eff
index 662e53ae6..192ae9dec 100644
--- a/Effects/model-combined.eff
+++ b/Effects/model-combined.eff
@@ -145,7 +145,6 @@ please see Docs/README.model-combined.eff for documentation
 		<fogtype><use>/sim/rendering/shaders/skydome</use></fogtype>
 		<wetness><use>/environment/surface/wetness</use></wetness>
 		<rnorm><use>/environment/rain-norm</use></rnorm>
-    		<use_IR_vision><use>/sim/rendering/als-filters/use-IR-vision</use></use_IR_vision>
 		<cloudpos1_x><use>/local-weather/cloud-shadows/cloudpos-x[0]</use></cloudpos1_x>
 		<cloudpos1_y><use>/local-weather/cloud-shadows/cloudpos-y[0]</use></cloudpos1_y>
 		<cloudpos2_x><use>/local-weather/cloud-shadows/cloudpos-x[1]</use></cloudpos2_x>
diff --git a/Effects/runway.eff b/Effects/runway.eff
index 542ca162e..74910dbaa 100644
--- a/Effects/runway.eff
+++ b/Effects/runway.eff
@@ -161,12 +161,13 @@
         <internal-format><use>texture[4]/internal-format</use></internal-format>
       </texture-unit>
       <program>
-        <vertex-shader n="1">Shaders/terrain-ALS-ultra.vert</vertex-shader>
-        <fragment-shader n="1">Shaders/runway-ALS.frag</fragment-shader>        
-	<fragment-shader n="2">Shaders/cloud-shadowfunc.frag</fragment-shader>
-	<fragment-shader n="3">Shaders/noise.frag</fragment-shader>
-	<fragment-shader n="4">Shaders/hazes.frag</fragment-shader>
-	<fragment-shader n="5">Shaders/secondary_lights.frag</fragment-shader>
+        <vertex-shader n="0">Shaders/terrain-ALS-ultra.vert</vertex-shader>
+        <fragment-shader n="0">Shaders/runway-ALS.frag</fragment-shader>        
+	<fragment-shader n="1">Shaders/cloud-shadowfunc.frag</fragment-shader>
+	<fragment-shader n="2">Shaders/noise.frag</fragment-shader>
+	<fragment-shader n="3">Shaders/hazes.frag</fragment-shader>
+	<fragment-shader n="4">Shaders/secondary_lights.frag</fragment-shader>
+	<fragment-shader n="5">Shaders/filters-ALS.frag</fragment-shader>
       </program>
       <uniform>
         <name>visibility</name>
@@ -268,6 +269,7 @@
         <type>float</type>
         <value><use>air_pollution</use></value>
       </uniform>
+      <!-- secondary lights -->	
       <uniform>
         <name>view_pitch_offset</name>
         <type>float</type>
@@ -298,6 +300,38 @@
         <type>float</type>
         <value><use>landing_light3_offset</use></value>
       </uniform>
+      <!-- filtering -->
+      <uniform>
+        <name>gamma</name>
+        <type>float</type>
+        <value><use>gamma</use></value>
+      </uniform>
+      <uniform>
+        <name>brightness</name>
+        <type>float</type>
+        <value><use>brightness</use></value>
+      </uniform>
+      <uniform>
+        <name>use_night_vision</name>
+        <type>bool</type>
+        <value><use>use_night_vision</use></value>
+      </uniform>
+      <uniform>
+        <name>use_IR_vision</name>
+        <type>bool</type>
+        <value><use>use_IR_vision</use></value>
+      </uniform>
+      <uniform>
+        <name>use_filtering</name>
+        <type>bool</type>
+        <value><use>use_filtering</use></value>
+      </uniform>
+      <uniform>
+        <name>delta_T</name>
+        <type>float</type>
+        <value><use>delta_T</use></value>
+      </uniform>
+      <!-- cloud shadows -->
       <uniform>
         <name>cloudpos1_x</name>
         <type>float</type>
diff --git a/Effects/space-combined.eff b/Effects/space-combined.eff
index 11b83af4b..03d392828 100644
--- a/Effects/space-combined.eff
+++ b/Effects/space-combined.eff
@@ -8,7 +8,7 @@
  <pass>
  <program>
         <vertex-shader n="0">Shaders/space-ALS-ultra.vert</vertex-shader>
-        <fragment-shader n="1">Shaders/space-ALS-ultra.frag</fragment-shader>
+        <fragment-shader n="0">Shaders/space-ALS-ultra.frag</fragment-shader>
   </program>
   </pass>
  </technique>
diff --git a/Effects/surface-lights-directional.eff b/Effects/surface-lights-directional.eff
index 957a46a04..f5e0ab51b 100644
--- a/Effects/surface-lights-directional.eff
+++ b/Effects/surface-lights-directional.eff
@@ -13,6 +13,8 @@
     <lthickness><use>/environment/ground-haze-thickness-m</use></lthickness>
     <eye_alt><use>/sim/rendering/eye-altitude-m</use></eye_alt>
     <terminator><use>/environment/terminator-relative-position-m</use></terminator>
+    <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>
   </parameters>
 
   <technique n="10">
@@ -112,6 +114,16 @@
 	<!-- Short-term fix for unstable normals in taxiway lights -->
         <value>false</value>
       </uniform>
+      <uniform>
+       	<name>use_night_vision</name>
+        <type>bool</type>
+       	<value><use>use_night_vision</use></value>
+      </uniform>
+      	 <uniform>
+       	<name>use_IR_vision</name>
+        <type>bool</type>
+       	<value><use>use_IR_vision</use></value>
+      </uniform>
       <uniform>
         <name>texture</name>
         <type>sampler-2d</type>
diff --git a/Effects/surface-lights.eff b/Effects/surface-lights.eff
index 1f3d9bc14..8db7f03dd 100644
--- a/Effects/surface-lights.eff
+++ b/Effects/surface-lights.eff
@@ -13,6 +13,8 @@
     <lthickness><use>/environment/ground-haze-thickness-m</use></lthickness>
     <eye_alt><use>/sim/rendering/eye-altitude-m</use></eye_alt>
     <terminator><use>/environment/terminator-relative-position-m</use></terminator>
+    <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>
   </parameters>
 
   <technique n="10">
@@ -112,6 +114,16 @@
         <type>bool</type>
         <value><use>light-directional</use></value>
       </uniform>
+      <uniform>
+       	<name>use_night_vision</name>
+        <type>bool</type>
+       	<value><use>use_night_vision</use></value>
+      </uniform>
+      	 <uniform>
+       	<name>use_IR_vision</name>
+        <type>bool</type>
+       	<value><use>use_IR_vision</use></value>
+      </uniform>
       <uniform>
         <name>texture</name>
         <type>sampler-2d</type>
diff --git a/Effects/terrain-default.eff b/Effects/terrain-default.eff
index 492f64537..15a45ccdf 100644
--- a/Effects/terrain-default.eff
+++ b/Effects/terrain-default.eff
@@ -456,6 +456,7 @@
         <type>float</type>
         <value><use>air_pollution</use></value>
       </uniform>
+      <!-- secondary lights -->
       <uniform>
         <name>view_pitch_offset</name>
         <type>float</type>
@@ -486,6 +487,7 @@
         <type>float</type>
         <value><use>landing_light3_offset</use></value>
       </uniform>
+      <!-- filtering -->
       <uniform>
         <name>gamma</name>
         <type>float</type>
@@ -516,6 +518,7 @@
         <type>float</type>
         <value><use>delta_T</use></value>
       </uniform>
+      <!-- cloud shadows -->
       <uniform>
         <name>cloudpos1_x</name>
         <type>float</type>
diff --git a/Shaders/airfield-ALS.frag b/Shaders/airfield-ALS.frag
index 2a016aaaf..1ce745b29 100644
--- a/Shaders/airfield-ALS.frag
+++ b/Shaders/airfield-ALS.frag
@@ -73,7 +73,7 @@ vec3 rayleigh_out_shift(in vec3 color, in float outscatter);
 vec3 get_hazeColor(in float light_arg);
 vec3 searchlight();
 vec3 landing_light(in float offset, in float offsetv);
-
+vec3 filter_combined (in vec3 color) ;
 
 
 float detail_fade (in float scale, in float angle, in float dist)
@@ -503,6 +503,8 @@ fragColor.rgb = mix(hazeColor+secondary_light * fog_backscatter(mvisibility), fr
 
 }
 
+fragColor.rgb = filter_combined(fragColor.rgb);
+
 gl_FragColor = fragColor;
 
 
diff --git a/Shaders/filters-ALS.frag b/Shaders/filters-ALS.frag
index 46d4914c8..812f4deed 100644
--- a/Shaders/filters-ALS.frag
+++ b/Shaders/filters-ALS.frag
@@ -55,7 +55,7 @@ value = 1.0 - value;
 
 float T_mapped = smoothstep(-10.0, 10.0, delta_T);
 
-float gain = mix(T_mapped, value, 0.7);
+float gain = mix(T_mapped, value, 0.5);
 //float gain = 0.2 * T_mapped + 0.8 * value * T_mapped;
 if (delta_T < -10.0) {gain = 0.0;}
 
@@ -72,17 +72,24 @@ if (use_filtering == false)
 	}
 
 
-color = brightness_adjust(color);
+
 
 if (use_night_vision)
 	{
+	color = brightness_adjust(color);
 	color = night_vision(color);
 	}
 
 else if (use_IR_vision)
 	{
+	float IR_brightness = min(1.0/(brightness+0.01), 5.0);
+	color = clamp(IR_brightness * color, 0.0, 1.0);
 	color = IR_vision(color);
 	}
+else
+	{
+	color = brightness_adjust(color);
+	}	
 
 return gamma_correction (color);
 
diff --git a/Shaders/model-ALS-ultra.frag b/Shaders/model-ALS-ultra.frag
index 65278c758..04aa8dbd8 100644
--- a/Shaders/model-ALS-ultra.frag
+++ b/Shaders/model-ALS-ultra.frag
@@ -538,10 +538,15 @@ void main (void)
         hazeColor = vec3 (1.0, 1.0, 1.0);
         }
 
+    if (use_IR_vision)
+	{
+	//hazeColor.rgb = max(hazeColor.rgb, vec3 (0.5, 0.5, 0.5));
+	}
+
 
     /// END fog color
 	fragColor = clamp(fragColor, 0.0, 1.0);
-    	//hazeColor = clamp(hazeColor, 0.0, 1.0);
+    	hazeColor = clamp(hazeColor, 0.0, 1.0);
 
     ///BEGIN Rayleigh fog ///
 
diff --git a/Shaders/runway-ALS.frag b/Shaders/runway-ALS.frag
index 5fcbf92f5..51d952aba 100644
--- a/Shaders/runway-ALS.frag
+++ b/Shaders/runway-ALS.frag
@@ -69,7 +69,7 @@ vec3 searchlight();
 vec3 landing_light(in float offset, in float offsetv);
 vec3 rayleigh_out_shift(in vec3 color, in float outscatter);
 vec3 get_hazeColor(in float light_arg);
-
+vec3 filter_combined (in vec3 color) ;
 
 
 void main()
@@ -516,12 +516,10 @@ fragColor.rgb = mix(hazeColor +secondary_light * fog_backscatter(mvisibility), f
 
 }
 
+fragColor.rgb = filter_combined(fragColor.rgb);
+
 gl_FragColor = fragColor;
 
-//if (overlay_flag == 1)
-//	{gl_FragColor = vec4 (1.0, 0.0, 0.0, 1.0);}
 
-//if (gl_TexCoord[0].s > 0.5) {gl_FragColor = vec4 (1.0, 0.0, 0.0, 1.0);}
-//if (gl_TexCoord[0].t > 0.5) {gl_FragColor = vec4 (0.0, 1.0, 0.0, 1.0);}
 }
 
diff --git a/Shaders/surface-light-ALS.frag b/Shaders/surface-light-ALS.frag
index 99efddea2..3dd1bbb40 100644
--- a/Shaders/surface-light-ALS.frag
+++ b/Shaders/surface-light-ALS.frag
@@ -9,6 +9,8 @@ uniform float eye_alt;
 uniform float terminator;
 uniform float size;
 
+uniform bool use_IR_vision;
+uniform bool use_night_vision;
 
 varying vec3 relPos;
 varying vec2 rawPos;
@@ -90,6 +92,8 @@ void main()
     float distance_in_layer;
     float transmission_arg;
 
+    if (use_IR_vision) {discard;}
+
     // Discard the second and third vertex, which are used for directional lighting
     if (gl_Color.a == 0.0) {discard;}
 
@@ -162,6 +166,10 @@ void main()
     //vec4 texel = light_sprite(gl_TexCoord[0].st,transmission, noise);
     float intensity = light_sprite(gl_TexCoord[0].st,transmission, noise);
     vec3 light_color = gl_Color.rgb;
+
+    if (use_night_vision) 
+	{light_color.rgb = vec3 (0.0, 1.0, 0.0);}
+
     light_color = mix(light_color, vec3 (1.0, 1.0, 1.0), 0.5 * intensity * intensity);
 
     gl_FragColor =   vec4 (clamp(light_color.rgb,0.0,1.0), intensity * transmission * dist_att);