diff --git a/autobuild.xml b/autobuild.xml
index 5199ce0d19..ac7105c8b5 100644
--- a/autobuild.xml
+++ b/autobuild.xml
@@ -1110,9 +1110,9 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>6f0127b409cda1635cf7d52f5ec52365</string>
+              <string>dfd1e738be5d48f5d99a903936cbce31</string>
               <key>url</key>
-              <string>http://s3-proxy.lindenlab.com/private-builds-secondlife-com/hg/repo/stinson_llpathinglibrary_xray/rev/252974/arch/Darwin/installer/llphysicsextensions-0.1-darwin-20120404.tar.bz2</string>
+              <string>http://s3-proxy.lindenlab.com/private-builds-secondlife-com/hg/repo/stinson_llpathinglibrary_xray/rev/252987/arch/Darwin/installer/llphysicsextensions-0.1-darwin-20120404.tar.bz2</string>
             </map>
             <key>name</key>
             <string>darwin</string>
@@ -1122,9 +1122,9 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>cb639c760253d1315dda8a283a6f2715</string>
+              <string>2656b0b7eddf19ca67ad5b55100b8782</string>
               <key>url</key>
-              <string>http://s3-proxy.lindenlab.com/private-builds-secondlife-com/hg/repo/stinson_llpathinglibrary_xray/rev/252974/arch/Linux/installer/llphysicsextensions-0.1-linux-20120404.tar.bz2</string>
+              <string>http://s3-proxy.lindenlab.com/private-builds-secondlife-com/hg/repo/stinson_llpathinglibrary_xray/rev/252987/arch/Linux/installer/llphysicsextensions-0.1-linux-20120404.tar.bz2</string>
             </map>
             <key>name</key>
             <string>linux</string>
@@ -1134,9 +1134,9 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>dbac794b95a4180f75d1190aee6a91f1</string>
+              <string>5ad3230901d4683902aa3bdf995309b2</string>
               <key>url</key>
-              <string>http://s3-proxy.lindenlab.com/private-builds-secondlife-com/hg/repo/stinson_llpathinglibrary_xray/rev/252974/arch/CYGWIN/installer/llphysicsextensions-0.1-windows-20120404.tar.bz2</string>
+              <string>http://s3-proxy.lindenlab.com/private-builds-secondlife-com/hg/repo/stinson_llpathinglibrary_xray/rev/252987/arch/CYGWIN/installer/llphysicsextensions-0.1-windows-20120404.tar.bz2</string>
             </map>
             <key>name</key>
             <string>windows</string>
diff --git a/indra/newview/llviewershadermgr.cpp b/indra/newview/llviewershadermgr.cpp
index 0948e261ce..65b6634c57 100644
--- a/indra/newview/llviewershadermgr.cpp
+++ b/indra/newview/llviewershadermgr.cpp
@@ -135,6 +135,7 @@ LLGLSLShader		gUnderWaterProgram;
 //interface shaders
 LLGLSLShader		gHighlightProgram;
 LLGLSLShader		gPathfindingProgram;
+LLGLSLShader		gPathfindingNoNormalsProgram;
 
 //avatar shader handles
 LLGLSLShader		gAvatarProgram;
@@ -596,6 +597,7 @@ void LLViewerShaderMgr::unloadShaders()
 	gAlphaMaskProgram.unload();
 	gUIProgram.unload();
 	gPathfindingProgram.unload();
+	gPathfindingNoNormalsProgram.unload();
 	gCustomAlphaProgram.unload();
 	gGlowCombineProgram.unload();
 	gSplatTextureRectProgram.unload();
@@ -2522,6 +2524,16 @@ BOOL LLViewerShaderMgr::loadShadersInterface()
 		success = gPathfindingProgram.createShader(NULL, NULL);
 	}
 
+	if (success)
+	{
+		gPathfindingNoNormalsProgram.mName = "PathfindingNoNormals Shader";
+		gPathfindingNoNormalsProgram.mShaderFiles.clear();
+		gPathfindingNoNormalsProgram.mShaderFiles.push_back(make_pair("interface/pathfindingNoNormalV.glsl", GL_VERTEX_SHADER_ARB));
+		gPathfindingNoNormalsProgram.mShaderFiles.push_back(make_pair("interface/pathfindingF.glsl", GL_FRAGMENT_SHADER_ARB));
+		gPathfindingNoNormalsProgram.mShaderLevel = mVertexShaderLevel[SHADER_INTERFACE];
+		success = gPathfindingNoNormalsProgram.createShader(NULL, NULL);
+	}
+
 	if (success)
 	{
 		gCustomAlphaProgram.mName = "Custom Alpha Shader";
diff --git a/indra/newview/llviewershadermgr.h b/indra/newview/llviewershadermgr.h
index 2f4edc2659..ceb14870d4 100644
--- a/indra/newview/llviewershadermgr.h
+++ b/indra/newview/llviewershadermgr.h
@@ -289,6 +289,7 @@ extern LLGLSLShader			gGlowExtractProgram;
 //interface shaders
 extern LLGLSLShader			gHighlightProgram;
 extern LLGLSLShader			gPathfindingProgram;
+extern LLGLSLShader			gPathfindingNoNormalsProgram;
 
 // avatar shader handles
 extern LLGLSLShader			gAvatarProgram;
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index 6f75c09803..fb6e97ea9d 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -4364,6 +4364,21 @@ void LLPipeline::renderDebug()
 													
 						int materialIndex = pathfindingConsole->getHeatMapType();
 						llPathingLibInstance->renderNavMesh( materialIndex );
+						
+						//render edges
+						if (LLGLSLShader::sNoFixedFunction)
+						{
+							gPathfindingNoNormalsProgram.bind();
+							gPathfindingNoNormalsProgram.uniform1f("tint", 1.f);
+							gPathfindingNoNormalsProgram.uniform1f("alpha_scale", 1.f);
+							llPathingLibInstance->renderNavMeshEdges( materialIndex );
+							gPathfindingProgram.bind();
+						}
+						else
+						{
+							llPathingLibInstance->renderNavMeshEdges( materialIndex );
+						}
+
 						gGL.flush();
 						glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );	
 						glLineWidth(1.0f);	
@@ -4504,6 +4519,20 @@ void LLPipeline::renderDebug()
 							gPathfindingProgram.uniform1f("ambiance", ambiance);
 							llPathingLibInstance->renderNavMesh( materialIndex );
 						}
+
+						//render edges
+						if (LLGLSLShader::sNoFixedFunction)
+						{
+							gPathfindingNoNormalsProgram.bind();
+							gPathfindingNoNormalsProgram.uniform1f("tint", gSavedSettings.getF32("PathfindingXRayTint"));
+							gPathfindingNoNormalsProgram.uniform1f("alpha_scale", gSavedSettings.getF32("PathfindingXRayOpacity"));
+							llPathingLibInstance->renderNavMeshEdges( materialIndex );
+							gPathfindingProgram.bind();
+						}
+						else
+						{
+							llPathingLibInstance->renderNavMeshEdges( materialIndex );
+						}
 					
 						gGL.flush();
 						glLineWidth(1.0f);