diff --git a/Effects/dirt-runway.eff b/Effects/dirt-runway.eff
index 5638a9bc6..0e529ceb5 100644
--- a/Effects/dirt-runway.eff
+++ b/Effects/dirt-runway.eff
@@ -19,6 +19,28 @@
       		 <wrap-t>repeat</wrap-t>
       		 <internal-format>normalized</internal-format>
    		</texture>
+		<texture n="18">
+     		 <image>Textures/Terrain/grain_texture.png</image>
+	 	 <type>2d</type>
+     		 <filter>linear-mipmap-linear</filter>
+     		 <wrap-s>repeat</wrap-s>
+     		 <wrap-t>repeat</wrap-t>
+     		 <internal-format>normalized</internal-format>
+   		</texture>
+		<strength_05m>0.5</strength_05m>
+		<strength_1m>0.5</strength_1m>
+		<strength_2m>0.0</strength_2m>
+		<strength_5m>0.0</strength_5m>
+		<strength_10m>0.0</strength_10m>
+		<filter_threshold>0.5</filter_threshold>
+		<filter_transition>0.2</filter_transition>
+		<relief_strength>1.0</relief_strength>
+		<bias_center>1</bias_center>
+		<bias_center_strength>0.3</bias_center_strength>
+		<size_base>100.0</size_base>
+		<size_overlay>30.0</size_overlay>
+		<size_grain>30.0</size_grain>
+    		<grain_strength>1.0</grain_strength>
 	</parameters>
 
 
@@ -99,12 +121,12 @@
       </texture-unit>
       <texture-unit>
         <unit>6</unit>
-		<type><use>texture[10]/type</use></type>
-        <image><use>texture[10]/image</use></image>
-        <filter><use>texture[10]/filter</use></filter>
-        <wrap-s><use>texture[10]/wrap-s</use></wrap-s>
-        <wrap-t><use>texture[10]/wrap-t</use></wrap-t>
-        <internal-format><use>texture[10]/internal-format</use></internal-format>
+		<type><use>texture[18]/type</use></type>
+        <image><use>texture[18]/image</use></image>
+        <filter><use>texture[18]/filter</use></filter>
+        <wrap-s><use>texture[18]/wrap-s</use></wrap-s>
+        <wrap-t><use>texture[18]/wrap-t</use></wrap-t>
+        <internal-format><use>texture[18]/internal-format</use></internal-format>
       </texture-unit>
       <texture-unit>
         <unit>7</unit>
@@ -188,6 +210,71 @@
 	<type>float</type>
 	<value>	<use>lichen_cover_factor</use></value>
       </uniform>
+      <uniform>
+	<name>size_base</name>
+	<type>float</type>
+	<value>	<use>size_base</use></value>
+      </uniform>
+      <uniform>
+	<name>size_overlay</name>
+	<type>float</type>
+	<value><use>size_overlay</use></value>
+      </uniform>
+      <uniform>
+	<name>size_grain</name>
+	<type>float</type>
+	<value><use>size_grain</use></value>
+      </uniform>
+      <uniform>
+	<name>grain_strength</name>
+	<type>float</type>
+	<value><use>grain_strength</use></value>
+      </uniform>
+      <uniform>
+	<name>strength_05m</name>
+	<type>float</type>
+	<value>	<use>strength_05m</use></value>
+      </uniform>
+      <uniform>
+	<name>strength_1m</name>
+	<type>float</type>
+	<value>	<use>strength_1m</use></value>
+      </uniform>
+      <uniform>
+	<name>strength_2m</name>
+	<type>float</type>
+	<value>	<use>strength_2m</use></value>
+      </uniform>
+      <uniform>
+	<name>strength_5m</name>
+	<type>float</type>
+	<value>	<use>strength_5m</use></value>
+      </uniform>
+      <uniform>
+	<name>strength_10m</name>
+	<type>float</type>
+	<value>	<use>strength_10m</use></value>
+      </uniform>
+      <uniform>
+	<name>filter_transition</name>
+	<type>float</type>
+	<value>	<use>filter_transition</use></value>
+      </uniform>
+      <uniform>
+	<name>filter_threshold</name>
+	<type>float</type>
+	<value>	<use>filter_threshold</use></value>
+      </uniform>
+      <uniform>
+	<name>relief_strength</name>
+	<type>float</type>
+	<value>	<use>relief_strength</use></value>
+      </uniform>
+      <uniform>
+        <name>bias_center_strength</name>
+        <type>float</type>
+        <value><use>bias_center_strength</use></value>
+      </uniform>
       <uniform>
         <name>wetness</name>
         <type>float</type>
@@ -443,6 +530,11 @@
         <type>int</type>
         <value><use>cloud_shadow_flag</use></value>
       </uniform>
+      <uniform>
+        <name>bias_center</name>
+        <type>int</type>
+        <value><use>bias_center</use></value>
+      </uniform>
       <uniform>
         <name>quality_level</name>
         <type>int</type>
@@ -499,7 +591,7 @@
         <value type="int">5</value>
       </uniform>
       <uniform>
-        <name>snow_texture</name>
+        <name>grain_texture</name>
         <type>sampler-2d</type>
         <value type="int">6</value>
       </uniform>
diff --git a/Materials/regions/global-summer.xml b/Materials/regions/global-summer.xml
index ba17e97d8..852741f19 100644
--- a/Materials/regions/global-summer.xml
+++ b/Materials/regions/global-summer.xml
@@ -522,15 +522,14 @@
     <rolling-friction>0.1</rolling-friction>
     <bumpiness>0.1</bumpiness>
     <load-resistance>1e30</load-resistance>
-    <!-- uncomment this to get volumetric grass on airport keep
-
-    <wood-coverage>10.0</wood-coverage>
+    <!-- uncomment this to get volumetric grass on airport keep-->
+    <!--<wood-coverage>10.0</wood-coverage>
     <tree-texture>Trees/grass_blades.png</tree-texture>
     <tree-varieties>1</tree-varieties>
     <tree-range-m>200.0</tree-range-m>
     <tree-height-m>0.3</tree-height-m>
     <tree-width-m>1.0</tree-width-m> 
-     -->
+    <tree-effect>Effects/tree-grass</tree-effect>-->
   </material>
 
   <!-- default mixed crop -->
diff --git a/Materials/regions/global.xml b/Materials/regions/global.xml
index ee9b44c40..bad52ce53 100644
--- a/Materials/regions/global.xml
+++ b/Materials/regions/global.xml
@@ -5,8 +5,34 @@
 
   <material>
     <name>grass_rwy</name>
-    <effect>Effects/airfield</effect>
+    <!--<effect>Effects/airfield</effect>-->
+    <effect>Effects/dirt-runway</effect>
+    <texture-set>
+      <texture>Runway/dirt_rwy.png</texture>
+      <texture n="16">Terrain/sand_hires_ochre.png</texture>
+      <texture n="17">Terrain/airport_grass2.png</texture>
+    </texture-set>
+    <parameters>
+ 	<strength_05m>0.3</strength_05m>
+	<strength_1m>0.4</strength_1m>
+	<strength_2m>0.0</strength_2m>
+	<strength_5m>0.1</strength_5m>
+	<strength_10m>0.2</strength_10m>
+	<filter_threshold>0.15</filter_threshold>
+	<filter_transition>0.1</filter_transition>
+	<bias_center>1</bias_center>
+	<bias_center_strength>0.6</bias_center_strength>
+        <relief_strength>0.35</relief_strength>
+	<size_base>25.0</size_base>
+	<size_overlay>30.0</size_overlay>
+	<size_grain>50.0</size_grain>
+    	<grain_strength>0.8</grain_strength>
+    </parameters>
+    <texture-set>
     <texture>Runway/grass_rwy.png</texture>
+      <texture n="16">Terrain/airport_grass2.png</texture>
+      <texture n="17">Terrain/sand_hires_ochre.png</texture>
+    </texture-set>
     <xsize>75</xsize>
     <ysize>75</ysize>
     <solid>1</solid>
@@ -26,8 +52,29 @@
   </material>
 
   <material>
+    <effect>Effects/dirt-runway</effect>
     <name>lakebed_taxiway</name>
-    <texture>Runway/lakebed_taxiway.png</texture>
+    <texture-set>
+      <texture>Runway/lakebed_taxiway.png</texture>
+      <texture n="16">Terrain/sand_hires.png</texture>
+      <texture n="17">Terrain/sand1.png</texture>
+    </texture-set>
+    <parameters>
+ 	<strength_05m>0.0</strength_05m>
+	<strength_1m>0.4</strength_1m>
+	<strength_2m>0.3</strength_2m>
+	<strength_5m>0.2</strength_5m>
+	<strength_10m>0.1</strength_10m>
+	<filter_threshold>0.2</filter_threshold>
+	<filter_transition>0.2</filter_transition>
+	<bias_center>1</bias_center>
+	<bias_center_strength>0.6</bias_center_strength>
+        <relief_strength>0.35</relief_strength>
+	<size_base>25.0</size_base>
+	<size_overlay>100.0</size_overlay>
+	<size_grain>100.0</size_grain>
+    	<grain_strength>0.3</grain_strength>
+    </parameters>
     <rolling-friction>0.04</rolling-friction>
     <bumpiness>0.05</bumpiness>
   </material>
diff --git a/Shaders/drunway-ALS.frag b/Shaders/drunway-ALS.frag
index fa26f6aae..689df7dd3 100644
--- a/Shaders/drunway-ALS.frag
+++ b/Shaders/drunway-ALS.frag
@@ -12,6 +12,7 @@ varying vec3 ecViewdir;
 uniform sampler2D texture;
 uniform sampler2D NormalTex;
 uniform sampler2D mix_texture;
+uniform sampler2D grain_texture;
 
 varying float steepness;
 
@@ -27,6 +28,19 @@ uniform float eye_alt;
 uniform float snowlevel;
 uniform float dust_cover_factor;
 uniform float lichen_cover_factor;
+uniform float filter_threshold;
+uniform float filter_transition;
+uniform float size_base;
+uniform float size_overlay;
+uniform float size_grain;
+uniform float strength_05m;
+uniform float strength_1m;
+uniform float strength_2m;
+uniform float strength_5m;
+uniform float strength_10m;
+uniform float relief_strength;
+uniform float grain_strength;
+uniform float bias_center_strength;
 uniform float wetness;
 uniform float fogstructure;
 uniform float snow_thickness_factor;
@@ -39,6 +53,7 @@ uniform float air_pollution;
 uniform int quality_level;
 uniform int tquality_level;
 uniform int cloud_shadow_flag;
+uniform int bias_center;
 uniform int use_searchlight;
 uniform int use_landing_light;
 uniform int use_alt_landing_light;
@@ -72,6 +87,7 @@ void main()
 {
 
 
+
 yprime_alt = diffuse_term.a;
 //diffuse_term.a = 1.0;
 mie_angle = gl_Color.a;
@@ -98,8 +114,8 @@ float ct = dot(vec3(0.0, 0.0, 1.0), relPos)/dist;
 
     vec4 texel;
     vec4 snow_texel;
-    vec4 detail_texel;
     vec4 mix_texel;
+    vec4 grain_texel;
     vec4 fragColor;
     vec4 specular = vec4(0.0);
     float intensity;
@@ -115,11 +131,12 @@ float ct = dot(vec3(0.0, 0.0, 1.0), relPos)/dist;
 //		2000m: overlay, detail, snow, fog
 
 float noise_01m;
+float noise_05m = Noise2D(rawPos.xy, 0.5);
 float noise_1m = Noise2D(rawPos.xy, 1.0); 
-float noise_10m; 
-float noise_5m;  
-noise_10m = Noise2D(rawPos.xy, 10.0);
-noise_5m = Noise2D(rawPos.xy ,5.0);
+float noise_2m = Noise2D(rawPos.xy, 2.0); 
+float noise_10m = Noise2D(rawPos.xy, 10.0);
+float noise_5m  = Noise2D(rawPos.xy ,5.0); 
+
 
 float noisegrad_10m;
 float noisegrad_5m;
@@ -139,9 +156,13 @@ float noise_2000m = Noise2D(rawPos.xy, 2000.0);
 
 // get the texels
 
-    texel = texture2D(texture, gl_TexCoord[0].st);
-    mix_texel = texture2D(mix_texture, gl_TexCoord[0].st * 5.0);
+    //texel = texture2D(texture, gl_TexCoord[0].st);
+    //mix_texel = texture2D(mix_texture, gl_TexCoord[0].st * 5.0);
+    texel = texture2D(texture, rawPos * 1.0/size_base);
+    mix_texel = texture2D(mix_texture, rawPos * 1.0/size_overlay);
+    grain_texel = texture2D(grain_texture, rawPos * 1.0/size_grain);
 	vec4 nmap  = texture2D(NormalTex, gl_TexCoord[0].st * 8.0);
+    //vec4 nmap  = texture2D(NormalTex, rawPos * 0.01);
 	vec3 N = nmap.rgb * 2.0 - 1.0;
 
     float distortion_factor = 1.0;
@@ -152,8 +173,33 @@ float noise_2000m = Noise2D(rawPos.xy, 2000.0);
     float snow_alpha;
 
 	
-	noise_term = smoothstep(0.8,1.0,noise_1m);
-	texel = mix(texel, mix_texel, noise_term);        
+	//noise_term = smoothstep(overlay_limit ,1.0,noise_1m);
+	//noise_term = smoothstep(overlay_limit, 1.0, 0.5 * noise_1m + 0.5 * noise_10m);
+	noise_term = strength_05m * noise_05m;
+	noise_term += strength_1m * noise_1m;
+	noise_term += strength_2m * noise_2m;
+	noise_term += strength_5m * noise_5m;
+	noise_term += strength_10m * noise_10m;
+
+
+
+	if (bias_center == 1)
+		{
+		float centerness = smoothstep(0.02, 0.1, (0.14 - abs(gl_TexCoord[0].s - 0.14)));
+		centerness *= smoothstep(0.05, 0.15, gl_TexCoord[0].t);
+		centerness = 1.0 - centerness;
+		
+		noise_term *= (1.0 - bias_center_strength) + bias_center_strength *  centerness;
+		noise_term = clamp(noise_term, 0.0, 1.0);
+		}	
+
+	float filtered_noise_term = smoothstep(filter_threshold, filter_threshold + filter_transition, noise_term);	
+
+	texel = mix(texel, mix_texel, filtered_noise_term);
+
+   	texel.rgb = mix(texel.rgb, grain_texel.rgb, grain_strength * grain_texel.a * (1.0 - noise_term));// * (1.0-smoothstep(2000.0,5000.0, dist)));
+
+
 
     //float view_angle = abs(dot(normal, normalize(ecViewdir)));
 
@@ -232,7 +278,7 @@ if ((dist < 5000.0)&& (quality_level > 3) && (wetness>0.0))
     
 	if (quality_level > 4)
 		{
-		NdotL = NdotL + (3.0 * N.r + 0.1 * (noise_01m-0.5))* (1.0 - water_factor) ;
+		NdotL = NdotL + (3.0 * N.r + 0.1 * (noise_01m-0.5))* (1.0 - water_factor) * relief_strength;
 		//NdotL = NdotL + 3.0 * N.r + 0.1 * (noise_01m-0.5) ;
 		}
     if (NdotL > 0.0) {