diff --git a/Compositor/Effects/building.eff b/Compositor/Effects/building.eff
index 7298777ff..5ddeec3e7 100644
--- a/Compositor/Effects/building.eff
+++ b/Compositor/Effects/building.eff
@@ -63,12 +63,6 @@
 			<negative-z>Aircraft/Generic/Effects/CubeMaps/buildings/D.png</negative-z>
 		</images>
 	</texture>
-  <texture n="6">
-    <!-- instance information from shader -->
-    <type>2d</type>
-    <wrap-s>clamp</wrap-s>
-    <wrap-t>clamp</wrap-t>
-  </texture>
     <!--Ambient correction -->
     <ambient-correction type="float"> 0.0 </ambient-correction>
     <dirt-enabled type="int"> 0 </dirt-enabled>
diff --git a/Compositor/Shaders/ALS/building-default.vert b/Compositor/Shaders/ALS/building-default.vert
index 813b2040c..0640592a7 100644
--- a/Compositor/Shaders/ALS/building-default.vert
+++ b/Compositor/Shaders/ALS/building-default.vert
@@ -35,6 +35,8 @@ varying vec3 relPos;
 varying float yprime_alt;
 varying float mie_angle;
 
+varying float flogz;
+
 uniform int colorMode;
 uniform float hazeLayerAltitude;
 uniform float terminator;
@@ -116,6 +118,7 @@ void main()
   position = position + instancePosition.xyz;
 
   gl_Position = gl_ModelViewProjectionMatrix * vec4(position,1.0);
+	flogz = 1.0 + gl_Position.w;
 
   // Texture coordinates are stored as:
   // - a separate offset (x0, y0) for the wall (wtex0x, wtex0y), and roof (rtex0x, rtex0y)
diff --git a/Compositor/Shaders/ALS/building-model-ultra.vert b/Compositor/Shaders/ALS/building-model-ultra.vert
index af1489c25..84e6ebe2b 100644
--- a/Compositor/Shaders/ALS/building-model-ultra.vert
+++ b/Compositor/Shaders/ALS/building-model-ultra.vert
@@ -16,6 +16,8 @@ varying	vec3	vViewVec;
 varying vec3	vertVec;
 varying	vec3	reflVec;
 
+varying float flogz;
+
 varying	float	alpha;
 
 attribute	vec3	tangent;
@@ -184,4 +186,5 @@ void	main(void)
 	  gl_FrontColor = vec4(1.0,1.0,1.0,1.0);
 	}
 	gl_Position  = gl_ModelViewProjectionMatrix * vec4(rawpos,1.0);
+	flogz = 1.0 + gl_Position.w;
 }