diff --git a/Effects/model-combined.eff b/Effects/model-combined.eff
index 5125c1dca..91cf4cf43 100644
--- a/Effects/model-combined.eff
+++ b/Effects/model-combined.eff
@@ -114,6 +114,8 @@ please see Docs/README.model-combined.eff for documentation
 		<dirt-factor type="float" n="1">0.0</dirt-factor>
 		<dirt-color type="vec3d" n="2">0.0 0.0 0.0</dirt-color>
 		<dirt-factor type="float" n="2">0.0</dirt-factor>
+		<dirt-modulates-reflection type="int">0</dirt-modulates-reflection>
+		<dirt-reflection-factor type="double">1.0</dirt-reflection-factor>
 		<!-- ambient correction -->
 		<ambient-correction type="float">0.05</ambient-correction>
 		<rendering-hint>opaque</rendering-hint>
@@ -758,6 +760,22 @@ please see Docs/README.model-combined.eff for documentation
 					   <use>dirt-factor[2]</use>
 				   </value>
 			   </uniform>
+
+			   <uniform>
+				   <name>dirt_modulates_reflection</name>
+				   <type>int</type>
+				   <value>
+					   <use>dirt-modulates-reflection</use>
+				   </value>
+			   </uniform>
+
+			   <uniform>
+				   <name>dirt_reflection_factor</name>
+				   <type>float</type>
+				   <value>
+					   <use>dirt-reflection-factor</use>
+				   </value>
+			   </uniform>
 			   
 
 			   <!-- use a grain texture map-->
diff --git a/Effects/space-combined.eff b/Effects/space-combined.eff
index 143ac384f..633b1be57 100644
--- a/Effects/space-combined.eff
+++ b/Effects/space-combined.eff
@@ -189,7 +189,7 @@
 				</value>
 		  	</uniform>
 			   
-			   <!-- 			reflection is used -->
+			   <!-- reflection is used -->
 			   <uniform>
 				   <name>refl_enabled</name>
 				   <type>int</type>
@@ -215,6 +215,15 @@
 				   </value>
 			   </uniform>
 
+			   <!-- how are colors merged in a reflection-->
+			   <uniform>
+				   <name>refl_type</name>
+				   <type>int</type>
+				   <value>
+					   <use>reflection-type</use>
+				   </value>
+			   </uniform>
+
 			   <!-- reflection is dynamic -->
 			   <uniform>
 				   <name>refl_dynamic</name>
@@ -315,6 +324,22 @@
 					   <use>dirt-factor[2]</use>
 				   </value>
 			   </uniform>
+
+			   <uniform>
+				   <name>dirt_modulates_reflection</name>
+				   <type>int</type>
+				   <value>
+					   <use>dirt-modulates-reflection</use>
+				   </value>
+			   </uniform>
+
+			   <uniform>
+				   <name>dirt_reflection_factor</name>
+				   <type>float</type>
+				   <value>
+					   <use>dirt-reflection-factor</use>
+				   </value>
+			   </uniform>
 			   
 
 			   <!-- use a grain texture map-->
diff --git a/Shaders/model-ALS-ultra.frag b/Shaders/model-ALS-ultra.frag
index 5f8baafc1..57c9dc3f6 100644
--- a/Shaders/model-ALS-ultra.frag
+++ b/Shaders/model-ALS-ultra.frag
@@ -28,6 +28,7 @@ uniform sampler2D GrainTex;
 
 uniform int dirt_enabled;
 uniform int dirt_multi;
+uniform int dirt_modulates_reflection;
 uniform int lightmap_enabled;
 uniform int lightmap_multi;
 uniform int nmap_dds;
@@ -47,6 +48,7 @@ uniform float amb_correction;
 uniform float dirt_b_factor;
 uniform float dirt_g_factor;
 uniform float dirt_r_factor;
+uniform float dirt_reflection_factor;
 uniform float lightmap_a_factor;
 uniform float lightmap_b_factor;
 uniform float lightmap_g_factor;
@@ -355,9 +357,24 @@ void main (void)
 	{
 	Diffuse.rgb = max(Diffuse.rgb, vec3 (0.5, 0.5, 0.5));
 	}
+
+    ///BEGIN reflection correction by dirt
+
+    float refl_d = 1.0;
+
+    if ((dirt_enabled == 1) && (dirt_modulates_reflection == 1))
+	{
+	refl_d =  1.0 - (reflmap.r * dirt_r_factor  * (1.0 - dirt_reflection_factor));
+	}
+
+    ///END reflection correction by dirt
+
+
     vec4 Specular = gl_FrontMaterial.specular * light_diffuse * pf + gl_FrontMaterial.specular * light_ambient * pf1;
     Specular+=  gl_FrontMaterial.specular * pow(max(0.0,-dot(N,normalize(vertVec))),gl_FrontMaterial.shininess) * vec4(secondary_light,1.0);
 
+    Specular *= refl_d;
+
     vec4 color = gl_Color + Diffuse * gl_FrontMaterial.diffuse;
     color = clamp( color, 0.0, 1.0 );
 
@@ -397,9 +414,9 @@ void main (void)
             raincolor *= light_diffuse;
 
 	    if (refl_type == 1)
-            	{mixedcolor = mix(texel, raincolor, reflFactor).rgb;}
+            	{mixedcolor = mix(texel, raincolor, reflFactor * refl_d).rgb;}
 	    else if (refl_type == 2)
-		{mixedcolor = ((texel +(reflcolor * reflFactor))-(0.5*reflFactor)).rgb;}
+		{mixedcolor = ((texel +(reflcolor * reflFactor * refl_d))-(0.5*reflFactor * refl_d)).rgb;}
 
         } else {
             mixedcolor = texel.rgb;
diff --git a/Shaders/space-ALS-ultra.frag b/Shaders/space-ALS-ultra.frag
index 3bb9e9445..3a6e28c4d 100644
--- a/Shaders/space-ALS-ultra.frag
+++ b/Shaders/space-ALS-ultra.frag
@@ -28,11 +28,13 @@ uniform sampler2D GrainTex;
 
 uniform int dirt_enabled;
 uniform int dirt_multi;
+uniform int dirt_modulates_reflection;
 uniform int lightmap_enabled;
 uniform int lightmap_multi;
 uniform int nmap_dds;
 uniform int nmap_enabled;
 uniform int refl_enabled;
+uniform int refl_type;
 uniform int refl_map;
 uniform int grain_texture_enabled;
 uniform int darkmap_enabled;
@@ -47,6 +49,7 @@ uniform float amb_correction;
 uniform float dirt_b_factor;
 uniform float dirt_g_factor;
 uniform float dirt_r_factor;
+uniform float dirt_reflection_factor;
 uniform float lightmap_a_factor;
 uniform float lightmap_b_factor;
 uniform float lightmap_g_factor;
@@ -350,10 +353,24 @@ void main (void)
     Diffuse.rgb = addLights(Diffuse.rgb, secondary_light * light_distance_fading(dist));
     //if (use_geo_light == 1)
     {Diffuse.rgb = addLights(Diffuse.rgb, geo_light * diffuse_reduction );}	
+
+
+    ///BEGIN reflection correction by dirt
+
+    float refl_d = 1.0;
+
+    if ((dirt_enabled == 1) && (dirt_modulates_reflection == 1))
+	{
+	refl_d =  1.0 - (reflmap.r * dirt_r_factor  * (1.0 - dirt_reflection_factor));
+	}
+
+    ///END reflection correction by dirt
 	
     vec4 Specular = gl_FrontMaterial.specular * light_diffuse * pf + gl_FrontMaterial.specular * light_ambient * pf1;
     Specular+=  gl_FrontMaterial.specular * pow(max(0.0,-dot(N,normalize(vertVec))),gl_FrontMaterial.shininess) * vec4(secondary_light,1.0);
 
+    Specular *= refl_d;
+
     vec4 color = gl_Color * light_ambient + gl_FrontMaterial.emission;
 
     color = color + Diffuse * gl_FrontMaterial.diffuse;
@@ -386,7 +403,12 @@ void main (void)
             vec4 raincolor = vec4(noisecolor.rgb * reflFactor, 1.0);
             raincolor += Specular;
             raincolor *= light_diffuse;
-            mixedcolor = mix(texel, raincolor, reflFactor).rgb;
+
+	    if (refl_type == 1)
+            	{mixedcolor = mix(texel, raincolor, reflFactor * refl_d).rgb;}
+	    else if (refl_type == 2)
+		{mixedcolor = ((texel +(reflcolor * reflFactor * refl_d))-(0.5*reflFactor * refl_d)).rgb;}
+
         } else {
             mixedcolor = texel.rgb;
         }