diff --git a/ogre/include/ignition/rendering/ogre/OgreIncludes.hh b/ogre/include/ignition/rendering/ogre/OgreIncludes.hh
index d858b8204..817bff8d4 100644
--- a/ogre/include/ignition/rendering/ogre/OgreIncludes.hh
+++ b/ogre/include/ignition/rendering/ogre/OgreIncludes.hh
@@ -22,6 +22,8 @@
   #pragma GCC system_header
 #else
   #pragma warning(push, 0)
+  #pragma warning(disable:4275)
+  #pragma warning(disable:4005)
 #endif
 
 // This prevents some deprecation #warning messages on OSX 10.9
diff --git a/ogre/src/OgreRenderTarget.cc b/ogre/src/OgreRenderTarget.cc
index 217c28a03..20b271e0a 100644
--- a/ogre/src/OgreRenderTarget.cc
+++ b/ogre/src/OgreRenderTarget.cc
@@ -20,6 +20,8 @@
 # pragma GCC diagnostic ignored "-Wunused-parameter"
 #else
 # pragma warning(push, 0)
+# pragma warning(disable: 4005)
+# pragma warning(disable: 4275)
 #endif
 // leave this out of OgreIncludes as it conflicts with other files requiring
 // gl.h
diff --git a/ogre2/src/Ogre2GpuRays.cc b/ogre2/src/Ogre2GpuRays.cc
index b4bae0233..846cc33d3 100644
--- a/ogre2/src/Ogre2GpuRays.cc
+++ b/ogre2/src/Ogre2GpuRays.cc
@@ -196,6 +196,10 @@ class ignition::rendering::Ogre2GpuRaysPrivate
 
   /// \brief Min allowed angle in radians;
   public: const math::Angle kMinAllowedAngle = 1e-4;
+
+  /// \brief Max number of cameras used for creating the cubemap of depth
+  /// textures for generating lidar data
+  public: const unsigned int kCubeCameraCount = 6;
 };
 
 using namespace ignition;
@@ -278,7 +282,7 @@ void Ogre2LaserRetroMaterialSwitcher::cameraPreRenderScene(
           {
             try
             {
-              retroValue = std::get<int>(tempLaserRetro);
+              retroValue = static_cast<float>(std::get<int>(tempLaserRetro));
             }
             catch(std::bad_variant_access &e)
             {
@@ -357,7 +361,7 @@ Ogre2GpuRays::Ogre2GpuRays()
   // r = depth, g = retro, and b = n/a
   this->channels = 3u;
 
-  for (unsigned int i = 0; i < 6u; ++i)
+  for (unsigned int i = 0; i < this->dataPtr->kCubeCameraCount; ++i)
   {
     this->dataPtr->cubeCam[i] = nullptr;
     this->dataPtr->ogreCompositorWorkspace1st[i] = nullptr;
@@ -386,6 +390,9 @@ void Ogre2GpuRays::Init()
 //////////////////////////////////////////////////
 void Ogre2GpuRays::Destroy()
 {
+  if (!this->dataPtr->ogreCamera)
+    return;
+
   if (this->dataPtr->gpuRaysBuffer)
   {
     delete [] this->dataPtr->gpuRaysBuffer;
@@ -465,6 +472,33 @@ void Ogre2GpuRays::Destroy()
         this->dataPtr->ogreCompositorNodeDef2nd);
     this->dataPtr->ogreCompositorWorkspaceDef2nd.clear();
   }
+
+  if (this->scene)
+  {
+    Ogre::SceneManager *ogreSceneManager = this->scene->OgreSceneManager();
+    if (ogreSceneManager == nullptr)
+    {
+      ignerr << "Scene manager not available. "
+             << "Unable to remove cameras and listeners" << std::endl;
+    }
+    else
+    {
+      for (unsigned int i = 0u; i < this->dataPtr->kCubeCameraCount; ++i)
+      {
+        if (this->dataPtr->cubeCam[i])
+        {
+          this->dataPtr->cubeCam[i]->removeListener(
+              this->dataPtr->particleNoiseListener[i].get());
+          ogreSceneManager->destroyCamera(this->dataPtr->cubeCam[i]);
+          this->dataPtr->cubeCam[i] = nullptr;
+        }
+        this->dataPtr->particleNoiseListener[i].reset();
+        this->dataPtr->laserRetroMaterialSwitcher[i].reset();
+      }
+      ogreSceneManager->destroyCamera(this->dataPtr->ogreCamera);
+      this->dataPtr->ogreCamera = nullptr;
+    }
+  }
 }
 
 /////////////////////////////////////////////////
@@ -587,19 +621,19 @@ math::Vector2d Ogre2GpuRays::SampleCubemap(const math::Vector3d &_v,
   math::Vector2d uv;
   if (vAbs.Z() >= vAbs.X() && vAbs.Z() >= vAbs.Y())
   {
-    _faceIndex = _v.Z() < 0.0 ? 5.0 : 4.0;
+    _faceIndex = _v.Z() < 0 ? 5 : 4;
     ma = 0.5 / vAbs.Z();
     uv = math::Vector2d(_v.Z() < 0.0 ? -_v.X() : _v.X(), -_v.Y());
   }
   else if (vAbs.Y() >= vAbs.X())
   {
-    _faceIndex = _v.Y() < 0.0 ? 3.0 : 2.0;
+    _faceIndex = _v.Y() < 0 ? 3 : 2;
     ma = 0.5 / vAbs.Y();
     uv = math::Vector2d(_v.X(), _v.Y() < 0.0 ? -_v.Z() : _v.Z());
   }
   else
   {
-    _faceIndex = _v.X() < 0.0 ? 1.0 : 0.0;
+    _faceIndex = _v.X() < 0 ? 1 : 0;
     ma = 0.5 / vAbs.X();
     uv = math::Vector2d(_v.X() < 0.0 ? _v.Z() : -_v.Z(), -_v.Y());
   }
@@ -689,7 +723,7 @@ void Ogre2GpuRays::CreateSampleTexture()
       // v
       pDest[index++] = uv.Y();
       // face
-      pDest[index++] = faceIdx;
+      pDest[index++] = static_cast<float>(faceIdx);
       // unused
       pDest[index++] = 1.0;
       h += hStep;
diff --git a/ogre2/src/Ogre2RenderEngine.cc b/ogre2/src/Ogre2RenderEngine.cc
index c3d18c929..29083d8f0 100644
--- a/ogre2/src/Ogre2RenderEngine.cc
+++ b/ogre2/src/Ogre2RenderEngine.cc
@@ -159,7 +159,7 @@ void Ogre2RenderEngine::Destroy()
   delete this->ogreLogManager;
   this->ogreLogManager = nullptr;
 
-#if not (__APPLE__ || _WIN32)
+#if !defined(__APPLE__) && !defined(_WIN32)
   if (this->dummyDisplay)
   {
     Display *x11Display = static_cast<Display*>(this->dummyDisplay);
@@ -382,7 +382,7 @@ void Ogre2RenderEngine::CreateLogger()
 //////////////////////////////////////////////////
 void Ogre2RenderEngine::CreateContext()
 {
-#if not (__APPLE__ || _WIN32)
+#if !defined(__APPLE__) && !defined(_WIN32)
   if (this->Headless())
   {
     // Nothing to do
diff --git a/ogre2/src/Ogre2RenderTarget.cc b/ogre2/src/Ogre2RenderTarget.cc
index b7caed451..98030b9fa 100644
--- a/ogre2/src/Ogre2RenderTarget.cc
+++ b/ogre2/src/Ogre2RenderTarget.cc
@@ -852,12 +852,16 @@ void Ogre2RenderTarget::RebuildMaterial()
 //////////////////////////////////////////////////
 // Ogre2RenderTexture
 //////////////////////////////////////////////////
+#ifndef _WIN32
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
 Ogre2RenderTexture::Ogre2RenderTexture()
 {
 }
+#ifndef _WIN32
 #pragma GCC diagnostic pop
+#endif
 
 //////////////////////////////////////////////////
 Ogre2RenderTexture::~Ogre2RenderTexture()
diff --git a/ogre2/src/Ogre2Scene.cc b/ogre2/src/Ogre2Scene.cc
index 5f9837fd1..d0804974a 100644
--- a/ogre2/src/Ogre2Scene.cc
+++ b/ogre2/src/Ogre2Scene.cc
@@ -651,7 +651,7 @@ void Ogre2Scene::UpdateShadowNode()
   // directional lights
   unsigned int atlasId = 0u;
   unsigned int texSize = 2048u;
-  unsigned int halfTexSize = texSize * 0.5;
+  unsigned int halfTexSize = static_cast<unsigned int>(texSize * 0.5);
   for (unsigned int i = 0; i < dirLightCount; ++i)
   {
     shadowParam.technique = Ogre::SHADOWMAP_PSSM;
@@ -866,12 +866,16 @@ void Ogre2Scene::CreateShadowNodeWithSettings(
     for (size_t j = 0; j < numSplits; ++j)
     {
       Ogre::Vector2 uvOffset(
-          shadowParam.atlasStart[j].x, shadowParam.atlasStart[j].y);
+          static_cast<Ogre::Real>(shadowParam.atlasStart[j].x),
+          static_cast<Ogre::Real>(shadowParam.atlasStart[j].y));
       Ogre::Vector2 uvLength(
-          shadowParam.resolution[j].x, shadowParam.resolution[j].y);
+          static_cast<Ogre::Real>(shadowParam.resolution[j].x),
+          static_cast<Ogre::Real>(shadowParam.resolution[j].y));
 
-      uvOffset /= Ogre::Vector2(texResolution.x, texResolution.y);
-      uvLength /= Ogre::Vector2(texResolution.x, texResolution.y);
+      uvOffset /= Ogre::Vector2(static_cast<Ogre::Real>(texResolution.x),
+          static_cast<Ogre::Real>(texResolution.y));
+      uvLength /= Ogre::Vector2(static_cast<Ogre::Real>(texResolution.x),
+          static_cast<Ogre::Real>(texResolution.y));
 
       const Ogre::String texName =
           "atlas" + Ogre::StringConverter::toString(shadowParam.atlasId);
diff --git a/ogre2/src/Ogre2SegmentationMaterialSwitcher.cc b/ogre2/src/Ogre2SegmentationMaterialSwitcher.cc
index 133a07e6a..923eaaf28 100644
--- a/ogre2/src/Ogre2SegmentationMaterialSwitcher.cc
+++ b/ogre2/src/Ogre2SegmentationMaterialSwitcher.cc
@@ -87,8 +87,8 @@ bool Ogre2SegmentationMaterialSwitcher::IsTakenColor(const math::Color &_color)
 {
   // Get the int value of the 24 bit color
   // Multiply by 255 as color values are normalized
-  int64_t colorId = (_color.R() * 255) * 256 * 256 +
-    (_color.G() * 255) * 256 + (_color.B() * 255);
+  int64_t colorId = static_cast<int64_t>((_color.R() * 255) * 256 * 256 +
+    (_color.G() * 255) * 256 + (_color.B() * 255));
 
   if (this->takenColors.count(colorId))
   {
@@ -117,7 +117,10 @@ math::Color Ogre2SegmentationMaterialSwitcher::LabelToColor(int64_t _label,
   int g = distribution(this->generator);
   int b = distribution(this->generator);
 
-  math::Color color(r, g, b);
+  math::Color color(
+    static_cast<float>(r),
+    static_cast<float>(g),
+    static_cast<float>(b));
 
   // if the label is colored before return the color
   // don't check for taken colors in that case, all items
diff --git a/ogre2/src/Ogre2ThermalCamera.cc b/ogre2/src/Ogre2ThermalCamera.cc
index c7aac0b2d..5cb5a2d50 100644
--- a/ogre2/src/Ogre2ThermalCamera.cc
+++ b/ogre2/src/Ogre2ThermalCamera.cc
@@ -177,7 +177,7 @@ class ignition::rendering::Ogre2ThermalCameraPrivate
   public: Ogre::CompositorWorkspace *ogreCompositorWorkspace;
 
   /// \brief Thermal textures.
-  public: Ogre::TextureGpu *ogreThermalTexture;
+  public: Ogre::TextureGpu *ogreThermalTexture{nullptr};
 
   /// \brief Dummy render texture for the thermal data
   public: RenderTexturePtr thermalTexture = nullptr;
@@ -288,7 +288,7 @@ void Ogre2ThermalCameraMaterialSwitcher::cameraPreRenderScene(
           {
             try
             {
-              temp = std::get<int>(tempAny);
+              temp = static_cast<float>(std::get<int>(tempAny));
             }
             catch(std::bad_variant_access &e)
             {
@@ -536,6 +536,7 @@ void Ogre2ThermalCamera::Destroy()
   {
     Ogre::MaterialManager::getSingleton().remove(
         this->dataPtr->thermalMaterial->getName());
+    this->dataPtr->thermalMaterial.setNull();
   }
 
   if (!this->dataPtr->ogreCompositorWorkspaceDef.empty())
@@ -560,6 +561,8 @@ void Ogre2ThermalCamera::Destroy()
       this->ogreCamera = nullptr;
     }
   }
+
+  this->dataPtr->thermalMaterialSwitcher.reset();
 }
 
 //////////////////////////////////////////////////
diff --git a/src/base/BaseScene.cc b/src/base/BaseScene.cc
index f56e7928c..8d1011138 100644
--- a/src/base/BaseScene.cc
+++ b/src/base/BaseScene.cc
@@ -1420,7 +1420,13 @@ bool BaseScene::LegacyAutoGpuFlush() const
 //////////////////////////////////////////////////
 void BaseScene::Clear()
 {
-  this->nodes->DestroyAll();
+  this->DestroyNodes();
+  auto root = this->RootVisual();
+  if (root)
+  {
+    root->RemoveChildren();
+    this->DestroyNode(root);
+  }
   this->DestroyMaterials();
   this->nextObjectId = ignition::math::MAX_UI16;
 }
diff --git a/test/integration/camera.cc b/test/integration/camera.cc
index e83b1e6cb..426094a22 100644
--- a/test/integration/camera.cc
+++ b/test/integration/camera.cc
@@ -798,6 +798,15 @@ void CameraTest::ShaderSelection(const std::string &_renderEngine)
 
   // Clean up
   engine->DestroyScene(scene);
+
+  ASSERT_EQ(1u, camera.use_count());
+  ASSERT_EQ(1u, gpuRays.use_count());
+  ASSERT_EQ(1u, thermalCamera.use_count());
+  if (segmentationCamera)
+  {
+    ASSERT_EQ(1u, segmentationCamera.use_count());
+  }
+
   rendering::unloadEngine(engine->Name());
 }