diff --git a/apps/opencs/model/prefs/state.cpp b/apps/opencs/model/prefs/state.cpp
index fd6c7b6ed..70456ee1d 100644
--- a/apps/opencs/model/prefs/state.cpp
+++ b/apps/opencs/model/prefs/state.cpp
@@ -172,7 +172,10 @@ void CSMPrefs::State::declare()
     inputButtons.add (left).add (cLeft).add (right).add (cRight).add (middle).add (cMiddle);
     declareEnum ("p-navi", "Primary Camera Navigation Button", left).addValues (inputButtons);
     declareEnum ("s-navi", "Secondary Camera Navigation Button", cLeft).addValues (inputButtons);
-    declareDouble ("p-navi-sensitivity", "Camera Sensitivity", 1/650.).setPrecision(4).setRange(-2.0, 2.0);
+    declareDouble ("p-navi-free-sensitivity", "Free Camera Sensitivity", 1/650.).setPrecision(5).setRange(0.0, 1.0);
+    declareBool ("p-navi-free-invert", "Invert Free Camera Mouse Input", false);
+    declareDouble ("p-navi-orbit-sensitivity", "Orbit Camera Sensitivity", 1/650.).setPrecision(5).setRange(0.0, 1.0);
+    declareBool ("p-navi-orbit-invert", "Invert Orbit Camera Mouse Input", false);
     declareDouble ("s-navi-sensitivity", "Secondary Camera Movement Sensitivity", 50.0).setRange(-1000.0, 1000.0);
     declareDouble ("navi-wheel-factor", "Camera Zoom Sensitivity", 8).setRange(-100.0, 100.0);
     declareDouble ("navi-free-lin-speed", "Free Camera Linear Speed", 1000.0).setRange(1.0, 10000.0);
diff --git a/apps/opencs/view/render/cameracontroller.cpp b/apps/opencs/view/render/cameracontroller.cpp
index 0ca8aabf1..cefd81003 100644
--- a/apps/opencs/view/render/cameracontroller.cpp
+++ b/apps/opencs/view/render/cameracontroller.cpp
@@ -27,6 +27,7 @@ namespace CSVRender
 
     CameraController::CameraController()
         : mActive(false)
+        , mInverted(false)
         , mCameraSensitivity(1/650.f)
         , mSecondaryMoveMult(50)
         , mWheelMoveMult(8)
@@ -53,6 +54,11 @@ namespace CSVRender
         return mCameraSensitivity;
     }
 
+    bool CameraController::getInverted() const
+    {
+        return mInverted;
+    }
+
     double CameraController::getSecondaryMovementMultiplier() const
     {
         return mSecondaryMoveMult;
@@ -77,6 +83,11 @@ namespace CSVRender
         mCameraSensitivity = value;
     }
 
+    void CameraController::setInverted(bool value)
+    {
+        mInverted = value;
+    }
+
     void CameraController::setSecondaryMovementMultiplier(double value)
     {
         mSecondaryMoveMult = value;
@@ -234,8 +245,9 @@ namespace CSVRender
 
         if (mode == "p-navi")
         {
-            yaw(x * getCameraSensitivity());
-            pitch(y * getCameraSensitivity());
+            double scalar = getCameraSensitivity() * (getInverted() ? -1.0 : 1.0);
+            yaw(x * scalar);
+            pitch(y * scalar);
         }
         else if (mode == "s-navi")
         {
@@ -448,8 +460,9 @@ namespace CSVRender
 
         if (mode == "p-navi")
         {
-            rotateHorizontal(x * getCameraSensitivity());
-            rotateVertical(-y * getCameraSensitivity());
+            double scalar = getCameraSensitivity() * (getInverted() ? -1.0 : 1.0);
+            rotateHorizontal(x * scalar);
+            rotateVertical(-y * scalar);
         }
         else if (mode == "s-navi")
         {
diff --git a/apps/opencs/view/render/cameracontroller.hpp b/apps/opencs/view/render/cameracontroller.hpp
index be83181ed..575bbb4ea 100644
--- a/apps/opencs/view/render/cameracontroller.hpp
+++ b/apps/opencs/view/render/cameracontroller.hpp
@@ -33,11 +33,13 @@ namespace CSVRender
 
             osg::Camera* getCamera() const;
             double getCameraSensitivity() const;
+            bool getInverted() const;
             double getSecondaryMovementMultiplier() const;
             double getWheelMovementMultiplier() const;
 
             void setCamera(osg::Camera*);
             void setCameraSensitivity(double value);
+            void setInverted(bool value);
             void setSecondaryMovementMultiplier(double value);
             void setWheelMovementMultiplier(double value);
 
@@ -55,7 +57,7 @@ namespace CSVRender
 
         private:
 
-            bool mActive;
+            bool mActive, mInverted;
             double mCameraSensitivity;
             double mSecondaryMoveMult;
             double mWheelMoveMult;
diff --git a/apps/opencs/view/render/scenewidget.cpp b/apps/opencs/view/render/scenewidget.cpp
index 6379f8eca..2ba396563 100644
--- a/apps/opencs/view/render/scenewidget.cpp
+++ b/apps/opencs/view/render/scenewidget.cpp
@@ -318,11 +318,22 @@ void SceneWidget::update(double dt)
 
 void SceneWidget::settingChanged (const CSMPrefs::Setting *setting)
 {
-    if (*setting=="3D Scene Input/p-navi-sensitivity")
+    if (*setting=="3D Scene Input/p-navi-free-sensitivity")
     {
         mFreeCamControl->setCameraSensitivity(setting->toDouble());
+    }
+    else if (*setting=="3D Scene Input/p-navi-orbit-sensitivity")
+    {
         mOrbitCamControl->setCameraSensitivity(setting->toDouble());
     }
+    else if (*setting=="3D Scene Input/p-navi-free-invert")
+    {
+        mFreeCamControl->setInverted(setting->isTrue());
+    }
+    else if (*setting=="3D Scene Input/p-navi-orbit-invert")
+    {
+        mOrbitCamControl->setInverted(setting->isTrue());
+    }
     else if (*setting=="3D Scene Input/s-navi-sensitivity")
     {
         mFreeCamControl->setSecondaryMovementMultiplier(setting->toDouble());