diff --git a/Effects/clouds-box.eff b/Effects/clouds-box.eff
index 88699a331..2dbb18940 100644
--- a/Effects/clouds-box.eff
+++ b/Effects/clouds-box.eff
@@ -66,7 +66,7 @@
         <type>sampler-2d</type>
         <value type="int">0</value>
       </uniform>
-      <vertex-program-two-side>true</vertex-program-two-side>
+      <vertex-program-two-side>false</vertex-program-two-side>
     </pass>
   </technique>
 </PropertyList>
diff --git a/Effects/clouds-thick.eff b/Effects/clouds-thick.eff
index 03b0849f6..52dcbb101 100644
--- a/Effects/clouds-thick.eff
+++ b/Effects/clouds-thick.eff
@@ -58,7 +58,7 @@
         <type>sampler-2d</type>
         <value type="int">0</value>
       </uniform>
-      <vertex-program-two-side>true</vertex-program-two-side>
+      <vertex-program-two-side>false</vertex-program-two-side>
     </pass>
   </technique>
 </PropertyList>
diff --git a/Effects/clouds-thin.eff b/Effects/clouds-thin.eff
index 827da1893..94a5fa172 100644
--- a/Effects/clouds-thin.eff
+++ b/Effects/clouds-thin.eff
@@ -66,7 +66,7 @@
         <type>sampler-2d</type>
         <value type="int">0</value>
       </uniform>
-      <vertex-program-two-side>true</vertex-program-two-side>
+      <vertex-program-two-side>false</vertex-program-two-side>
     </pass>
   </technique>
 </PropertyList>