diff -ura src/gazebo-8.1.1/gazebo/rendering/RenderEngine.cc src2/gazebo-8.1.1/gazebo/rendering/RenderEngine.cc
--- src/gazebo-8.1.1/gazebo/rendering/RenderEngine.cc	2017-01-26 02:16:27.000000000 +0100
+++ src2/gazebo-8.1.1/gazebo/rendering/RenderEngine.cc	2017-08-06 19:28:22.086767172 +0200
@@ -351,7 +351,6 @@
   // TODO: this was causing a segfault. Need to debug, and put back in
   if (this->dataPtr->root)
   {
-    this->dataPtr->root->shutdown();
     /*const Ogre::Root::PluginInstanceList ll =
      this->dataPtr->root->getInstalledPlugins();
 
diff -ura src/gazebo-8.1.1/gazebo/rendering/skyx/src/MeshManager.cpp src2/gazebo-8.1.1/gazebo/rendering/skyx/src/MeshManager.cpp
--- src/gazebo-8.1.1/gazebo/rendering/skyx/src/MeshManager.cpp	2017-01-26 02:16:27.000000000 +0100
+++ src2/gazebo-8.1.1/gazebo/rendering/skyx/src/MeshManager.cpp	2017-08-25 23:33:57.747595635 +0200
@@ -32,9 +32,9 @@
       , mCreated(false)
       , mSubMesh(0)
       , mEntity(0)
-      , mVertexBuffer(0)
+      , mVertexBuffer()
       , mVertices(0)
-      , mIndexBuffer(0)
+      , mIndexBuffer()
       , mSceneNode(0)
       , mSteps(70)
       , mCircles(95)
diff -ura src/gazebo-8.1.1/gazebo/rendering/skyx/src/VClouds/DataManager.cpp src2/gazebo-8.1.1/gazebo/rendering/skyx/src/VClouds/DataManager.cpp
--- src/gazebo-8.1.1/gazebo/rendering/skyx/src/VClouds/DataManager.cpp	2017-01-26 02:16:27.000000000 +0100
+++ src2/gazebo-8.1.1/gazebo/rendering/skyx/src/VClouds/DataManager.cpp	2017-08-06 19:27:43.967225361 +0200
@@ -22,6 +22,8 @@
 */
 
 #include <vector>
+
+#include <OgrePixelFormat.h>
 #include "VClouds/DataManager.h"
 
 #include "VClouds/VClouds.h"
@@ -689,8 +691,12 @@
       {
         for (x = pb.left; x < pb.right; x++)
         {
+          Ogre::uint8 *ptr = (Ogre::uint8 *)pb.data +
+                             (x + y * pb.rowPitch + z * pb.slicePitch) *
+                                 Ogre::PixelUtil::getNumElemBytes(pb.format);
+
           Ogre::PixelUtil::packColour(c[x][y][z].dens/* TODO!!!! */,
-              c[x][y][z].light, 0, 0, pb.format, &pbptr[x]);
+              c[x][y][z].light, 0, 0, pb.format, ptr);
         }
         pbptr += pb.rowPitch;
       }
diff -ura src/gazebo-8.1.1/media/materials/scripts/ShadowCaster.material src2/gazebo-8.1.1/media/materials/scripts/ShadowCaster.material
--- src/gazebo-8.1.1/media/materials/scripts/ShadowCaster.material	2017-01-26 02:16:28.000000000 +0100
+++ src2/gazebo-8.1.1/media/materials/scripts/ShadowCaster.material	2017-08-06 19:27:43.967225361 +0200
@@ -65,19 +65,3 @@
 		}
 	}
 }
-
-material DeferredRendering/Shadows/RSMCaster_Spot
-{
-	technique
-	{
-		pass
-		{
-			vertex_program_ref DeferredShading/Shadows/RSMCasterVP
-			{
-			}
-			fragment_program_ref DeferredShading/Shadows/RSMCasterFP_Spot
-			{
-			}
-		}
-	}
-}
diff -r 01ac9ab0c44e -r 97d1dae5f3fc gazebo/rendering/deferred_shading/MergeMaterialGenerator.cc
--- a/gazebo-8.1.1/gazebo/rendering/deferred_shading/MergeMaterialGenerator.cc       Tue Sep 12 17:18:20 2017 +0000
+++ b/gazebo-8.1.1/gazebo/rendering/deferred_shading/MergeMaterialGenerator.cc       Fri Sep 22 19:47:43 2017 +0200
@@ -101,7 +101,6 @@

   Ogre::String programSource = ss.str();

-  std::cout << programSource << "\n";
   Ogre::String programName = this->baseName + "VP_" +
     Ogre::StringConverter::toString(_permutation);

@@ -294,7 +293,6 @@
   Ogre::String programName = this->baseName + "FP_" +
     Ogre::StringConverter::toString(_permutation);

-  std::cout << programSource << "\n";
 #if OGRE_DEBUG_MODE
   Ogre::LogManager::getSingleton().getDefaultLog()->logMessage(programSource);
 #endif