diff --git a/apps/openmw/mwclass/activator.cpp b/apps/openmw/mwclass/activator.cpp
index 8ffcf70253..e4ba7af4f0 100644
--- a/apps/openmw/mwclass/activator.cpp
+++ b/apps/openmw/mwclass/activator.cpp
@@ -38,12 +38,12 @@ namespace MWClass
         }
     }
 
-    void Activator::insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Activator::insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
         insertObjectPhysics(ptr, model, rotation, physics, skipAnimated);
     }
 
-    void Activator::insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Activator::insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
         if(!model.empty())
             physics.addObject(ptr, model, rotation, MWPhysics::CollisionType_World, skipAnimated);
diff --git a/apps/openmw/mwclass/activator.hpp b/apps/openmw/mwclass/activator.hpp
index f7497f01bc..32bf1564c9 100644
--- a/apps/openmw/mwclass/activator.hpp
+++ b/apps/openmw/mwclass/activator.hpp
@@ -17,9 +17,9 @@ namespace MWClass
             void insertObjectRendering (const MWWorld::Ptr& ptr, const std::string& model, MWRender::RenderingInterface& renderingInterface) const override;
             ///< Add reference into a cell for rendering
 
-            void insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
+            void insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
 
-            void insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const override;
+            void insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const override;
 
             std::string getName (const MWWorld::ConstPtr& ptr) const override;
             ///< \return name or ID; can return an empty string.
diff --git a/apps/openmw/mwclass/actor.cpp b/apps/openmw/mwclass/actor.cpp
index 6621df1ec8..b142fd2643 100644
--- a/apps/openmw/mwclass/actor.cpp
+++ b/apps/openmw/mwclass/actor.cpp
@@ -22,7 +22,7 @@ namespace MWClass
         MWBase::Environment::get().getWorld()->adjustPosition(ptr, force);
     }
 
-    void Actor::insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Actor::insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
         if (!model.empty())
         {
diff --git a/apps/openmw/mwclass/actor.hpp b/apps/openmw/mwclass/actor.hpp
index cc1d0c9089..6a5d4c5150 100644
--- a/apps/openmw/mwclass/actor.hpp
+++ b/apps/openmw/mwclass/actor.hpp
@@ -24,7 +24,7 @@ namespace MWClass
         ///< Adjust position to stand on ground. Must be called post model load
         /// @param force do this even if the ptr is flying
 
-        void insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
+        void insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
 
         bool useAnim() const override;
 
diff --git a/apps/openmw/mwclass/container.cpp b/apps/openmw/mwclass/container.cpp
index 5c1ddd8bd1..051fbafeb5 100644
--- a/apps/openmw/mwclass/container.cpp
+++ b/apps/openmw/mwclass/container.cpp
@@ -106,12 +106,12 @@ namespace MWClass
         }
     }
 
-    void Container::insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Container::insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
         insertObjectPhysics(ptr, model, rotation, physics, skipAnimated);
     }
 
-    void Container::insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Container::insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
         if(!model.empty())
             physics.addObject(ptr, model, rotation, MWPhysics::CollisionType_World, skipAnimated);
diff --git a/apps/openmw/mwclass/container.hpp b/apps/openmw/mwclass/container.hpp
index 1cbc5a6142..9407dab243 100644
--- a/apps/openmw/mwclass/container.hpp
+++ b/apps/openmw/mwclass/container.hpp
@@ -42,8 +42,8 @@ namespace MWClass
             void insertObjectRendering (const MWWorld::Ptr& ptr, const std::string& model, MWRender::RenderingInterface& renderingInterface) const override;
             ///< Add reference into a cell for rendering
 
-            void insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
-            void insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
+            void insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
+            void insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
 
             std::string getName (const MWWorld::ConstPtr& ptr) const override;
             ///< \return name or ID; can return an empty string.
diff --git a/apps/openmw/mwclass/door.cpp b/apps/openmw/mwclass/door.cpp
index e608c27000..70c4a27582 100644
--- a/apps/openmw/mwclass/door.cpp
+++ b/apps/openmw/mwclass/door.cpp
@@ -55,7 +55,7 @@ namespace MWClass
         }
     }
 
-    void Door::insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Door::insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
         insertObjectPhysics(ptr, model, rotation, physics, skipAnimated);
 
@@ -70,7 +70,7 @@ namespace MWClass
         }
     }
 
-    void Door::insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Door::insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
         if(!model.empty())
             physics.addObject(ptr, model, rotation, MWPhysics::CollisionType_Door, skipAnimated);
diff --git a/apps/openmw/mwclass/door.hpp b/apps/openmw/mwclass/door.hpp
index 5882842e91..1fd59f8f52 100644
--- a/apps/openmw/mwclass/door.hpp
+++ b/apps/openmw/mwclass/door.hpp
@@ -18,8 +18,8 @@ namespace MWClass
             void insertObjectRendering (const MWWorld::Ptr& ptr, const std::string& model, MWRender::RenderingInterface& renderingInterface) const override;
             ///< Add reference into a cell for rendering
 
-            void insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
-            void insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
+            void insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
+            void insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
 
             bool isDoor() const override;
 
diff --git a/apps/openmw/mwclass/light.cpp b/apps/openmw/mwclass/light.cpp
index ad5eb4e737..0281861980 100644
--- a/apps/openmw/mwclass/light.cpp
+++ b/apps/openmw/mwclass/light.cpp
@@ -33,7 +33,7 @@ namespace MWClass
         renderingInterface.getObjects().insertModel(ptr, model, true, !(ref->mBase->mData.mFlags & ESM::Light::OffDefault));
     }
 
-    void Light::insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Light::insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
         MWWorld::LiveCellRef<ESM::Light> *ref =
             ptr.get<ESM::Light>();
@@ -47,7 +47,7 @@ namespace MWClass
                                                                       MWSound::PlayMode::Loop);
     }
 
-    void Light::insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Light::insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
         // TODO: add option somewhere to enable collision for placeable objects
         if (!model.empty() && (ptr.get<ESM::Light>()->mBase->mData.mFlags & ESM::Light::Carry) == 0)
diff --git a/apps/openmw/mwclass/light.hpp b/apps/openmw/mwclass/light.hpp
index 55fef759aa..206abede43 100644
--- a/apps/openmw/mwclass/light.hpp
+++ b/apps/openmw/mwclass/light.hpp
@@ -14,8 +14,8 @@ namespace MWClass
             void insertObjectRendering (const MWWorld::Ptr& ptr, const std::string& model, MWRender::RenderingInterface& renderingInterface) const override;
             ///< Add reference into a cell for rendering
 
-            void insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
-            void insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
+            void insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
+            void insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
 
             bool useAnim() const override;
 
diff --git a/apps/openmw/mwclass/static.cpp b/apps/openmw/mwclass/static.cpp
index 25029528ea..5cbe219580 100644
--- a/apps/openmw/mwclass/static.cpp
+++ b/apps/openmw/mwclass/static.cpp
@@ -23,12 +23,12 @@ namespace MWClass
         }
     }
 
-    void Static::insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Static::insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
         insertObjectPhysics(ptr, model, rotation, physics, skipAnimated);
     }
 
-    void Static::insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Static::insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
         if(!model.empty())
             physics.addObject(ptr, model, rotation, MWPhysics::CollisionType_World, skipAnimated);
diff --git a/apps/openmw/mwclass/static.hpp b/apps/openmw/mwclass/static.hpp
index d1991d0550..7c326987a8 100644
--- a/apps/openmw/mwclass/static.hpp
+++ b/apps/openmw/mwclass/static.hpp
@@ -14,8 +14,8 @@ namespace MWClass
             void insertObjectRendering (const MWWorld::Ptr& ptr, const std::string& model, MWRender::RenderingInterface& renderingInterface) const override;
             ///< Add reference into a cell for rendering
 
-            void insertObject(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
-            void insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
+            void insertObject(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
+            void insertObjectPhysics(const MWWorld::Ptr& ptr, const std::string& model, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const override;
 
             std::string getName (const MWWorld::ConstPtr& ptr) const override;
             ///< \return name or ID; can return an empty string.
diff --git a/apps/openmw/mwworld/class.cpp b/apps/openmw/mwworld/class.cpp
index 96f03af6c3..55e39de55e 100644
--- a/apps/openmw/mwworld/class.cpp
+++ b/apps/openmw/mwworld/class.cpp
@@ -30,12 +30,12 @@ namespace MWWorld
 
     }
 
-    void Class::insertObject(const Ptr& ptr, const std::string& mesh, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Class::insertObject(const Ptr& ptr, const std::string& mesh, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {
 
     }
 
-    void Class::insertObjectPhysics(const Ptr& ptr, const std::string& mesh, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
+    void Class::insertObjectPhysics(const Ptr& ptr, const std::string& mesh, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated) const
     {}
 
     bool Class::apply (const MWWorld::Ptr& ptr, const std::string& id,  const MWWorld::Ptr& actor) const
diff --git a/apps/openmw/mwworld/class.hpp b/apps/openmw/mwworld/class.hpp
index 7937209c6e..4779a3065b 100644
--- a/apps/openmw/mwworld/class.hpp
+++ b/apps/openmw/mwworld/class.hpp
@@ -78,9 +78,9 @@ namespace MWWorld
             }
 
             virtual void insertObjectRendering (const Ptr& ptr, const std::string& mesh, MWRender::RenderingInterface& renderingInterface) const;
-            virtual void insertObject(const Ptr& ptr, const std::string& mesh, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const;
+            virtual void insertObject(const Ptr& ptr, const std::string& mesh, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const;
             ///< Add reference into a cell for rendering (default implementation: don't render anything).
-            virtual void insertObjectPhysics(const Ptr& ptr, const std::string& mesh, osg::Quat rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const;
+            virtual void insertObjectPhysics(const Ptr& ptr, const std::string& mesh, const osg::Quat& rotation, MWPhysics::PhysicsSystem& physics, bool skipAnimated = false) const;
 
             virtual std::string getName (const ConstPtr& ptr) const = 0;
             ///< \return name or ID; can return an empty string.