Make sure render textures are inactive when in a cell without water

apps/openmw/mwrender/refraction.cpp

@@ -99,4 +99,9 @@ namespace MWRender
         }
     }
 
+    void Refraction::setActive(bool active)
+    {
+        mRenderTarget->setActive(active);
+    }
+
 }

apps/openmw/mwrender/refraction.hpp

@@ -25,6 +25,7 @@ namespace MWRender
         void preRenderTargetUpdate(const Ogre::RenderTargetEvent& evt);
         void postRenderTargetUpdate(const Ogre::RenderTargetEvent& evt);
         void setUnderwater(bool underwater) {mIsUnderwater = underwater;}
+        void setActive (bool active);
 
         void renderQueueStarted (Ogre::uint8 queueGroupId, const Ogre::String &invocation, bool &skipThisInvocation);
         void renderQueueEnded (Ogre::uint8 queueGroupId, const Ogre::String &invocation, bool &repeatThisInvocation);

apps/openmw/mwrender/water.cpp

@@ -372,9 +372,9 @@ void Water::updateVisible()
 {
     mWater->setVisible(mToggled && mActive);
     if (mReflection)
-    {
         mReflection->setActive(mToggled && mActive);
-    }
+    if (mRefraction)
+        mRefraction->setActive(mToggled && mActive);
 }
 
 void Water::update(float dt, Ogre::Vector3 player)
@@ -424,6 +424,8 @@ void Water::applyRTT()
         mRefraction = new Refraction(mCamera);
         mRefraction->setHeight(mTop);
     }
+
+    updateVisible();
 }
 
 void Water::applyVisibilityMask()