diff --git a/Aircraft/c172p/Models/Effects/bumpspec.eff b/Aircraft/c172p/Models/Effects/bumpspec.eff
index 613e4aeac..72416c207 100644
--- a/Aircraft/c172p/Models/Effects/bumpspec.eff
+++ b/Aircraft/c172p/Models/Effects/bumpspec.eff
@@ -43,6 +43,21 @@
     <binormal type="int">7</binormal>
   </generate>
 
+   <technique n="4">
+	   <pass>
+		   <program>
+			   <attribute>
+				   <name>tangent</name>
+				   <index>6</index>
+			   </attribute>
+			   <attribute>
+				   <name>binormal</name>
+				   <index>7</index>
+			   </attribute>
+		   </program>
+	   </pass>
+   </technique>
+
   <technique n="7">
     <pass>
       <program>
diff --git a/Docs/model-combined.eff/model-combined-bump.eff b/Docs/model-combined.eff/model-combined-bump.eff
index 7c99249eb..b1d70c80c 100644
--- a/Docs/model-combined.eff/model-combined-bump.eff
+++ b/Docs/model-combined.eff/model-combined-bump.eff
@@ -77,6 +77,21 @@
 			<binormal type="int">7</binormal>
 		</generate>
 
+		<technique n="4">
+			<pass>
+				<program>
+					<attribute>
+						<name>tangent</name>
+						<index>6</index>
+					</attribute>
+					<attribute>
+						<name>binormal</name>
+						<index>7</index>
+					</attribute>
+				</program>
+			</pass>
+		</technique>
+
 		<technique n="7">
 			<pass>
 				<program>
diff --git a/Docs/model-combined.eff/model-combined-transparent.eff b/Docs/model-combined.eff/model-combined-transparent.eff
index 22c843f84..3376dc8ba 100644
--- a/Docs/model-combined.eff/model-combined-transparent.eff
+++ b/Docs/model-combined.eff/model-combined-transparent.eff
@@ -100,6 +100,21 @@ WARNING: do not remove the Transparency include at the end-->
 			<binormal type="int">7</binormal>
 		</generate>
 
+		<technique n="4">
+			<pass>
+				<program>
+					<attribute>
+						<name>tangent</name>
+						<index>6</index>
+					</attribute>
+					<attribute>
+						<name>binormal</name>
+						<index>7</index>
+					</attribute>
+				</program>
+			</pass>
+		</technique>
+
 		<technique n="8">
 			<pass>
 				<program>