diff --git a/examples/projector/Main.cc b/examples/projector/Main.cc
index 5dc678db8..a991c98dd 100644
--- a/examples/projector/Main.cc
+++ b/examples/projector/Main.cc
@@ -27,7 +27,6 @@
 #include <iostream>
 #include <vector>
 
-
 #include <gz/common/Console.hh>
 #include <gz/rendering.hh>
 
@@ -210,7 +209,6 @@ int main(int _argc, char** _argv)
     }
     catch (...)
     {
-      // std::cout << ex.what() << std::endl;
       std::cerr << "Error starting up: " << engineName << std::endl;
     }
   }
diff --git a/include/gz/rendering/Projector.hh b/include/gz/rendering/Projector.hh
index ddfd4053e..b041d966a 100644
--- a/include/gz/rendering/Projector.hh
+++ b/include/gz/rendering/Projector.hh
@@ -42,15 +42,15 @@ namespace gz
       /// \brief Destructor
       public: virtual ~Projector();
 
-      /// \brief Get the camera's far clipping plane distance
+      /// \brief Get the projector's far clipping plane distance
       /// \return Far clipping plane distance
       public: virtual double FarClipPlane() const = 0;
 
-      /// \brief Set the camera's far clipping plane distance
+      /// \brief Set the projector's far clipping plane distance
       /// \param[in] _far Far clipping plane distance
       public: virtual void SetFarClipPlane(double _far) = 0;
 
-      /// \brief Get the camera's near clipping plane distance
+      /// \brief Get the projector's near clipping plane distance
       /// \return Near clipping plane distance
       public: virtual double NearClipPlane() const = 0;
 
@@ -58,11 +58,11 @@ namespace gz
       /// \param[in] _near Near clipping plane distance
       public: virtual void SetNearClipPlane(double _near) = 0;
 
-      /// \brief Get the camera's horizontal field-of-view
-      /// \return Angle containing the camera's horizontal field-of-view
+      /// \brief Get the projector's horizontal field-of-view
+      /// \return Angle containing the projector's horizontal field-of-view
       public: virtual math::Angle HFOV() const = 0;
 
-      /// \brief Set the camera's horizontal field-of-view
+      /// \brief Set the projector's horizontal field-of-view
       /// \param[in] _hfov Desired horizontal field-of-view
       public: virtual void SetHFOV(const math::Angle &_hfov) = 0;
 
diff --git a/include/gz/rendering/Scene.hh b/include/gz/rendering/Scene.hh
index 8235ab852..de516bcff 100644
--- a/include/gz/rendering/Scene.hh
+++ b/include/gz/rendering/Scene.hh
@@ -43,7 +43,6 @@ namespace gz
     //
     class RenderEngine;
     class SceneExt;
-//    static std::unordered_map<const Scene *, SceneExt *> g_sceneExtMap;
 
     /// \class Scene Scene.hh gz/rendering/Scene.hh
     /// \brief Manages a single scene-graph. This class updates scene-wide
diff --git a/ogre2/src/Ogre2Material.cc b/ogre2/src/Ogre2Material.cc
index 240e9164a..464158028 100644
--- a/ogre2/src/Ogre2Material.cc
+++ b/ogre2/src/Ogre2Material.cc
@@ -1535,6 +1535,9 @@ void Ogre2Material::SetFragmentShader(const std::string &_path)
 
   auto mat = this->Material();
   auto pass = mat->getTechnique(0u)->getPass(0);
+  Ogre::HlmsBlendblock block;
+  block.setBlendType(Ogre::SBT_TRANSPARENT_ALPHA);
+  pass->setBlendblock(block);
   pass->setFragmentProgram(fragmentShader->getName());
   mat->compile();
   mat->load();
diff --git a/ogre2/src/Ogre2Projector.cc b/ogre2/src/Ogre2Projector.cc
index ad9683f58..1e25281e8 100644
--- a/ogre2/src/Ogre2Projector.cc
+++ b/ogre2/src/Ogre2Projector.cc
@@ -115,7 +115,7 @@ Ogre2Projector::~Ogre2Projector()
   if (!this->scene->IsInitialized())
     return;
 
-  for (auto &ogreCamIt : this->dataPtr->camerasWithListener)
+  for (const auto &ogreCamIt : this->dataPtr->camerasWithListener)
   {
     Ogre::IdString camName = ogreCamIt.second;
     auto ogreCam = this->scene->OgreSceneManager()->findCameraNoThrow(camName);
diff --git a/src/base/BaseScene.cc b/src/base/BaseScene.cc
index 975d7441f..3803d127f 100644
--- a/src/base/BaseScene.cc
+++ b/src/base/BaseScene.cc
@@ -1613,21 +1613,3 @@ void BaseScene::CreateMaterials()
   material->SetReceiveShadows(true);
   material->SetLightingEnabled(true);
 }
-
-/*
-//////////////////////////////////////////////////
-BaseSceneExt::BaseSceneExt(Scene *_scene)
-{
-  this->scene = _scene;
-}
-
-//////////////////////////////////////////////////
-ObjectPtr BaseScene::CreateExt(const std::string &_type)
-{
-  BaseScene *baseScene = dynamic_cast<BaseScene *>(this->scene);
-  if (_type == "projector")
-  {
-    return std::dynamic_pointer_cast<Object>(baseScene->CreateProjector());
-  }
-}
-*/