diff --git a/apps/openmw/CMakeLists.txt b/apps/openmw/CMakeLists.txt
index e0986ae32..70979cca7 100644
--- a/apps/openmw/CMakeLists.txt
+++ b/apps/openmw/CMakeLists.txt
@@ -13,12 +13,15 @@ set(GAMEREND
     mwrender/mwscene.cpp
     mwrender/cellimp.cpp
     mwrender/interior.cpp
+    mwrender/exterior.cpp
+    mwrender/playerpos.cpp
     mwrender/sky.cpp)
 set(GAMEREND_HEADER
     mwrender/cell.hpp
     mwrender/cellimp.hpp
     mwrender/mwscene.hpp
     mwrender/interior.hpp
+    mwrender/exterior.hpp
     mwrender/playerpos.hpp
     mwrender/sky.hpp)
 source_group(apps\\openmw\\mwrender FILES ${GAMEREND} ${GAMEREND_HEADER})
diff --git a/apps/openmw/mwclass/activator.cpp b/apps/openmw/mwclass/activator.cpp
index 69a510803..6c96811d8 100644
--- a/apps/openmw/mwclass/activator.cpp
+++ b/apps/openmw/mwclass/activator.cpp
@@ -21,9 +21,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/apparatus.cpp b/apps/openmw/mwclass/apparatus.cpp
index 007b2ca77..1d4afc096 100644
--- a/apps/openmw/mwclass/apparatus.cpp
+++ b/apps/openmw/mwclass/apparatus.cpp
@@ -24,9 +24,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/armor.cpp b/apps/openmw/mwclass/armor.cpp
index 5c06077b2..1217d56a6 100644
--- a/apps/openmw/mwclass/armor.cpp
+++ b/apps/openmw/mwclass/armor.cpp
@@ -24,9 +24,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/book.cpp b/apps/openmw/mwclass/book.cpp
index 179a060c6..3679eb7ee 100644
--- a/apps/openmw/mwclass/book.cpp
+++ b/apps/openmw/mwclass/book.cpp
@@ -24,9 +24,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/clothing.cpp b/apps/openmw/mwclass/clothing.cpp
index c3bbfa9f0..07ded0264 100644
--- a/apps/openmw/mwclass/clothing.cpp
+++ b/apps/openmw/mwclass/clothing.cpp
@@ -24,9 +24,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/container.cpp b/apps/openmw/mwclass/container.cpp
index 9c1ed7a89..ea61508b8 100644
--- a/apps/openmw/mwclass/container.cpp
+++ b/apps/openmw/mwclass/container.cpp
@@ -21,9 +21,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/creature.cpp b/apps/openmw/mwclass/creature.cpp
index fc9515fff..2e16ac6a4 100644
--- a/apps/openmw/mwclass/creature.cpp
+++ b/apps/openmw/mwclass/creature.cpp
@@ -33,9 +33,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/door.cpp b/apps/openmw/mwclass/door.cpp
index c22b8005e..32b33e95a 100644
--- a/apps/openmw/mwclass/door.cpp
+++ b/apps/openmw/mwclass/door.cpp
@@ -29,9 +29,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/ingredient.cpp b/apps/openmw/mwclass/ingredient.cpp
index 29d66d012..e4ea509f9 100644
--- a/apps/openmw/mwclass/ingredient.cpp
+++ b/apps/openmw/mwclass/ingredient.cpp
@@ -24,9 +24,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/light.cpp b/apps/openmw/mwclass/light.cpp
index e57511452..de5c06a73 100644
--- a/apps/openmw/mwclass/light.cpp
+++ b/apps/openmw/mwclass/light.cpp
@@ -28,7 +28,7 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
 
             cellRender.insertMesh ("meshes\\" + model);
 
@@ -40,7 +40,7 @@ namespace MWClass
             const float radius = float (ref->base->data.radius);
             cellRender.insertLight (r, g, b, radius);
 
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/lockpick.cpp b/apps/openmw/mwclass/lockpick.cpp
index c87d1e128..3b08ff199 100644
--- a/apps/openmw/mwclass/lockpick.cpp
+++ b/apps/openmw/mwclass/lockpick.cpp
@@ -24,9 +24,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/misc.cpp b/apps/openmw/mwclass/misc.cpp
index 57dca3148..d4ffdce38 100644
--- a/apps/openmw/mwclass/misc.cpp
+++ b/apps/openmw/mwclass/misc.cpp
@@ -24,9 +24,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/npc.cpp b/apps/openmw/mwclass/npc.cpp
index 0fdc77963..04ae468e4 100644
--- a/apps/openmw/mwclass/npc.cpp
+++ b/apps/openmw/mwclass/npc.cpp
@@ -40,7 +40,8 @@ namespace MWClass
         std::string headModel = "meshes\\" +
             environment.mWorld->getStore().bodyParts.find(headID)->model;
 
-        cellRender.insertBegin (ref->ref);
+        MWRender::Rendering rendering (cellRender, ref->ref);
+
         cellRender.insertMesh (headModel);
 
         //TODO: define consts for each bodypart e.g. chest, foot, wrist... and put the parts in the
@@ -51,7 +52,7 @@ namespace MWClass
         if (bodyPart)
             cellRender.insertMesh("meshes\\" + bodyPart->model);
 
-        ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+        ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
     }
 
     void Npc::enable (const MWWorld::Ptr& ptr, MWWorld::Environment& environment) const
diff --git a/apps/openmw/mwclass/potion.cpp b/apps/openmw/mwclass/potion.cpp
index 3fe38542b..e163473f7 100644
--- a/apps/openmw/mwclass/potion.cpp
+++ b/apps/openmw/mwclass/potion.cpp
@@ -24,9 +24,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/probe.cpp b/apps/openmw/mwclass/probe.cpp
index bc6c4ba19..9188ae9ea 100644
--- a/apps/openmw/mwclass/probe.cpp
+++ b/apps/openmw/mwclass/probe.cpp
@@ -24,9 +24,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/repair.cpp b/apps/openmw/mwclass/repair.cpp
index 253569afe..7b42bc95c 100644
--- a/apps/openmw/mwclass/repair.cpp
+++ b/apps/openmw/mwclass/repair.cpp
@@ -24,9 +24,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/static.cpp b/apps/openmw/mwclass/static.cpp
index 211d239c6..33e3e0ed4 100644
--- a/apps/openmw/mwclass/static.cpp
+++ b/apps/openmw/mwclass/static.cpp
@@ -19,9 +19,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwclass/weapon.cpp b/apps/openmw/mwclass/weapon.cpp
index 5a941360a..4c14e58ea 100644
--- a/apps/openmw/mwclass/weapon.cpp
+++ b/apps/openmw/mwclass/weapon.cpp
@@ -24,9 +24,9 @@ namespace MWClass
         const std::string &model = ref->base->model;
         if (!model.empty())
         {
-            cellRender.insertBegin (ref->ref);
+            MWRender::Rendering rendering (cellRender, ref->ref);
             cellRender.insertMesh ("meshes\\" + model);
-            ref->mData.setHandle (cellRender.insertEnd (ref->mData.isEnabled()));
+            ref->mData.setHandle (rendering.end (ref->mData.isEnabled()));
         }
     }
 
diff --git a/apps/openmw/mwrender/cellimp.cpp b/apps/openmw/mwrender/cellimp.cpp
index a5b4b51c7..887941f05 100644
--- a/apps/openmw/mwrender/cellimp.cpp
+++ b/apps/openmw/mwrender/cellimp.cpp
@@ -1,6 +1,8 @@
 #include "cellimp.hpp"
 
 #include <cassert>
+#include <iostream>
+#include <exception>
 
 #include "../mwworld/class.hpp"
 #include "../mwworld/ptr.hpp"
@@ -23,8 +25,16 @@ void insertCellRefList (CellRenderImp& cellRender, MWWorld::Environment& environ
             {
                 MWWorld::Ptr ptr (&*it, &cell);
 
-                class_.insertObj (ptr, cellRender, environment);
-                class_.enable (ptr, environment);
+                try
+                {
+                    class_.insertObj (ptr, cellRender, environment);
+                    class_.enable (ptr, environment);
+                }
+                catch (const std::exception& e)
+                {
+                    std::string error ("error during rendering: ");
+                    std::cerr << error + e.what() << std::endl;
+                }
             }
         }
     }
diff --git a/apps/openmw/mwrender/cellimp.hpp b/apps/openmw/mwrender/cellimp.hpp
index fadba79a5..bc6f2874a 100644
--- a/apps/openmw/mwrender/cellimp.hpp
+++ b/apps/openmw/mwrender/cellimp.hpp
@@ -43,6 +43,38 @@ namespace MWRender
     void insertCell(ESMS::CellStore<MWWorld::RefData> &cell, MWWorld::Environment& environment);
 
   };
+
+    /// Exception-safe rendering
+    class Rendering
+    {
+            CellRenderImp& mCellRender;
+            bool mEnd;
+
+            // not implemented
+            Rendering (const Rendering&);
+            Rendering& operator= (const Rendering&);
+
+        public:
+
+            Rendering (CellRenderImp& cellRender, ESM::CellRef &ref)
+            : mCellRender (cellRender), mEnd (false)
+            {
+                mCellRender.insertBegin (ref);
+            }
+
+            ~Rendering()
+            {
+                if (!mEnd)
+                    mCellRender.insertEnd (false);
+            }
+
+            std::string end (bool enable)
+            {
+                assert (!mEnd);
+                mEnd = true;
+                return mCellRender.insertEnd (enable);
+            }
+    };
 }
 
 #endif
diff --git a/apps/openmw/mwrender/exterior.cpp b/apps/openmw/mwrender/exterior.cpp
new file mode 100644
index 000000000..58c783d72
--- /dev/null
+++ b/apps/openmw/mwrender/exterior.cpp
@@ -0,0 +1,241 @@
+#include "exterior.hpp"
+
+#include <OgreEntity.h>
+#include <OgreLight.h>
+#include <OgreSceneNode.h>
+#include <OgreCamera.h>
+#include <OgreSceneManager.h>
+
+#include <components/nifogre/ogre_nif_loader.hpp>
+#include "mwscene.hpp"
+
+using namespace MWRender;
+using namespace Ogre;
+using namespace ESMS;
+
+bool ExteriorCellRender::lightConst = false;
+float ExteriorCellRender::lightConstValue = 0.0f;
+
+bool ExteriorCellRender::lightLinear = true;
+int ExteriorCellRender::lightLinearMethod = 1;
+float ExteriorCellRender::lightLinearValue = 3;
+float ExteriorCellRender::lightLinearRadiusMult = 1;
+
+bool ExteriorCellRender::lightQuadratic = false;
+int ExteriorCellRender::lightQuadraticMethod = 2;
+float ExteriorCellRender::lightQuadraticValue = 16;
+float ExteriorCellRender::lightQuadraticRadiusMult = 1;
+
+bool ExteriorCellRender::lightOutQuadInLin = false;
+
+// start inserting a new reference.
+
+void ExteriorCellRender::insertBegin (ESM::CellRef &ref)
+{
+  assert (!insert);
+
+  // Create and place scene node for this object
+  insert = base->createChildSceneNode();
+
+  const float *f = ref.pos.pos;
+  insert->setPosition(f[0], f[1], f[2]);
+  insert->setScale(ref.scale, ref.scale, ref.scale);
+
+  // Convert MW rotation to a quaternion:
+  f = ref.pos.rot;
+
+  // Rotate around X axis
+  Quaternion xr(Radian(-f[0]), Vector3::UNIT_X);
+
+  // Rotate around Y axis
+  Quaternion yr(Radian(-f[1]), Vector3::UNIT_Y);
+
+  // Rotate around Z axis
+  Quaternion zr(Radian(-f[2]), Vector3::UNIT_Z);
+
+  // Rotates first around z, then y, then x
+  insert->setOrientation(xr*yr*zr);
+}
+
+// insert a mesh related to the most recent insertBegin call.
+
+void ExteriorCellRender::insertMesh(const std::string &mesh)
+{
+  assert (insert);
+
+  NIFLoader::load(mesh);
+  MovableObject *ent = scene.getMgr()->createEntity(mesh);
+  insert->attachObject(ent);
+}
+
+// insert a light related to the most recent insertBegin call.
+void ExteriorCellRender::insertLight(float r, float g, float b, float radius)
+{
+  assert (insert);
+
+  Ogre::Light *light = scene.getMgr()->createLight();
+  light->setDiffuseColour (r, g, b);
+
+  float cval=0.0f, lval=0.0f, qval=0.0f;
+
+  if(lightConst)
+    cval = lightConstValue;
+  if(!lightOutQuadInLin)
+  {
+    if(lightLinear)
+      radius *= lightLinearRadiusMult;
+    if(lightQuadratic)
+      radius *= lightQuadraticRadiusMult;
+
+    if(lightLinear)
+      lval = lightLinearValue / pow(radius, lightLinearMethod);
+    if(lightQuadratic)
+      qval = lightQuadraticValue / pow(radius, lightQuadraticMethod);
+  }
+  else
+  {
+    // FIXME:
+    // Do quadratic or linear, depending if we're in an exterior or interior
+    // cell, respectively. Ignore lightLinear and lightQuadratic.
+  }
+
+  light->setAttenuation(10*radius, cval, lval, qval);
+
+  insert->attachObject(light);
+}
+
+// finish inserting a new reference and return a handle to it.
+
+std::string ExteriorCellRender::insertEnd (bool enable)
+{
+  assert (insert);
+
+  std::string handle = insert->getName();
+
+  if (!enable)
+    insert->setVisible (false);
+
+  insert = 0;
+
+  return handle;
+}
+
+// configure lighting according to cell
+
+void ExteriorCellRender::configureAmbient()
+{
+  ambientColor.setAsABGR (cell.cell->ambi.ambient);
+  setAmbientMode();
+
+  // Create a "sun" that shines light downwards. It doesn't look
+  // completely right, but leave it for now.
+  Ogre::Light *light = scene.getMgr()->createLight();
+  Ogre::ColourValue colour;
+  colour.setAsABGR (cell.cell->ambi.sunlight);
+  light->setDiffuseColour (colour);
+  light->setType(Ogre::Light::LT_DIRECTIONAL);
+  light->setDirection(0,-1,0);
+}
+
+// configure fog according to cell
+void ExteriorCellRender::configureFog()
+{
+  Ogre::ColourValue color;
+  color.setAsABGR (cell.cell->ambi.fog);
+
+  float high = 4500 + 9000 * (1-cell.cell->ambi.fogDensity);
+  float low = 200;
+
+  scene.getMgr()->setFog (FOG_LINEAR, color, 0, low, high);
+  scene.getCamera()->setFarClipDistance (high + 10);
+  scene.getViewport()->setBackgroundColour (color);
+}
+
+void ExteriorCellRender::setAmbientMode()
+{
+  switch (ambientMode)
+  {
+    case 0:
+
+      scene.getMgr()->setAmbientLight(ambientColor);
+      break;
+
+    case 1:
+
+      scene.getMgr()->setAmbientLight(0.7f*ambientColor + 0.3f*ColourValue(1,1,1));
+      break;
+
+    case 2:
+
+      scene.getMgr()->setAmbientLight(ColourValue(1,1,1));
+      break;
+  }
+}
+
+void ExteriorCellRender::show()
+{
+  base = scene.getRoot()->createChildSceneNode();
+
+  configureAmbient();
+  configureFog();
+
+  insertCell(cell, mEnvironment);
+}
+
+void ExteriorCellRender::hide()
+{
+  if(base)
+    base->setVisible(false);
+}
+
+void ExteriorCellRender::destroy()
+{
+  if(base)
+    {
+      base->removeAndDestroyAllChildren();
+      scene.getMgr()->destroySceneNode(base);
+    }
+
+  base = NULL;
+}
+
+// Switch through lighting modes.
+
+void ExteriorCellRender::toggleLight()
+{
+  if (ambientMode==2)
+    ambientMode = 0;
+  else
+    ++ambientMode;
+
+  switch (ambientMode)
+  {
+    case 0: std::cout << "Setting lights to normal\n"; break;
+    case 1: std::cout << "Turning the lights up\n"; break;
+    case 2: std::cout << "Turning the lights to full\n"; break;
+  }
+
+  setAmbientMode();
+}
+
+void ExteriorCellRender::enable (const std::string& handle)
+{
+    if (!handle.empty())
+        scene.getMgr()->getSceneNode (handle)->setVisible (true);
+}
+
+void ExteriorCellRender::disable (const std::string& handle)
+{
+    if (!handle.empty())
+        scene.getMgr()->getSceneNode (handle)->setVisible (false);
+}
+
+void ExteriorCellRender::deleteObject (const std::string& handle)
+{
+    if (!handle.empty())
+    {
+        Ogre::SceneNode *node = scene.getMgr()->getSceneNode (handle);
+        node->removeAndDestroyAllChildren();
+        scene.getMgr()->destroySceneNode (node);
+    }
+}
diff --git a/apps/openmw/mwrender/exterior.hpp b/apps/openmw/mwrender/exterior.hpp
new file mode 100644
index 000000000..7de027672
--- /dev/null
+++ b/apps/openmw/mwrender/exterior.hpp
@@ -0,0 +1,114 @@
+#ifndef _GAME_RENDER_EXTERIOR_H
+#define _GAME_RENDER_EXTERIOR_H
+
+#include "cell.hpp"
+#include "cellimp.hpp"
+
+#include "OgreColourValue.h"
+
+namespace Ogre
+{
+  class SceneNode;
+}
+
+namespace MWWorld
+{
+    class Environment;
+}
+
+namespace MWRender
+{
+  class MWScene;
+
+  /**
+     This class is responsible for inserting meshes and other
+     rendering objects from the given cell into the given rendering
+     scene.
+   */
+
+  class ExteriorCellRender : public CellRender, private CellRenderImp
+  {
+
+    static bool lightConst;
+    static float lightConstValue;
+
+    static bool lightLinear;
+    static int lightLinearMethod;
+    static float lightLinearValue;
+    static float lightLinearRadiusMult;
+
+    static bool lightQuadratic;
+    static int lightQuadraticMethod;
+    static float lightQuadraticValue;
+    static float lightQuadraticRadiusMult;
+
+    static bool lightOutQuadInLin;
+
+    ESMS::CellStore<MWWorld::RefData> &cell;
+    MWWorld::Environment &mEnvironment;
+    MWScene &scene;
+
+    /// The scene node that contains all objects belonging to this
+    /// cell.
+    Ogre::SceneNode *base;
+
+    Ogre::SceneNode *insert;
+
+    // 0 normal, 1 more bright, 2 max
+    int ambientMode;
+
+    Ogre::ColourValue ambientColor;
+
+    /// start inserting a new reference.
+    virtual void insertBegin (ESM::CellRef &ref);
+
+    /// insert a mesh related to the most recent insertBegin call.
+    virtual void insertMesh(const std::string &mesh);
+
+    /// insert a light related to the most recent insertBegin call.
+    virtual void insertLight(float r, float g, float b, float radius);
+
+    /// finish inserting a new reference and return a handle to it.
+    virtual std::string insertEnd (bool Enable);
+
+    /// configure lighting according to cell
+    void configureAmbient();
+
+    /// configure fog according to cell
+    void configureFog();
+
+    void setAmbientMode();
+
+  public:
+
+    ExteriorCellRender(ESMS::CellStore<MWWorld::RefData> &_cell, MWWorld::Environment& environment,
+        MWScene &_scene)
+    : cell(_cell), mEnvironment (environment), scene(_scene), base(NULL), insert(NULL), ambientMode (0) {}
+
+    virtual ~ExteriorCellRender() { destroy(); }
+
+    /// Make the cell visible. Load the cell if necessary.
+    virtual void show();
+
+    /// Remove the cell from rendering, but don't remove it from
+    /// memory.
+    virtual void hide();
+
+    /// Destroy all rendering objects connected with this cell.
+    virtual void destroy(); // comment by Zini: shouldn't this go into the destructor?
+
+    /// Switch through lighting modes.
+    void toggleLight();
+
+    /// Make the reference with the given handle visible.
+    virtual void enable (const std::string& handle);
+
+    /// Make the reference with the given handle invisible.
+    virtual void disable (const std::string& handle);
+
+    /// Remove the reference with the given handle permanently from the scene.
+    virtual void deleteObject (const std::string& handle);
+  };
+}
+
+#endif
diff --git a/apps/openmw/mwrender/interior.hpp b/apps/openmw/mwrender/interior.hpp
index 8d69ca061..ba5089eb5 100644
--- a/apps/openmw/mwrender/interior.hpp
+++ b/apps/openmw/mwrender/interior.hpp
@@ -24,8 +24,6 @@ namespace MWRender
      This class is responsible for inserting meshes and other
      rendering objects from the given cell into the given rendering
      scene.
-
-     TODO FIXME: Doesn't do full cleanup yet.
    */
 
   class InteriorCellRender : public CellRender, private CellRenderImp
diff --git a/apps/openmw/mwrender/mwscene.cpp b/apps/openmw/mwrender/mwscene.cpp
index 15163d7a2..133607797 100644
--- a/apps/openmw/mwrender/mwscene.cpp
+++ b/apps/openmw/mwrender/mwscene.cpp
@@ -9,6 +9,10 @@
 #include "OgreCamera.h"
 #include "OgreTextureManager.h"
 
+#include "../mwworld/world.hpp" // these includes can be removed once the static-hack is gone
+#include "../mwworld/ptr.hpp"
+#include <components/esm/loadstat.hpp>
+
 using namespace MWRender;
 using namespace Ogre;
 
@@ -36,7 +40,7 @@ MWScene::MWScene(OEngine::Render::OgreRenderer &_rend)
   mRaySceneQuery = rend.getScene()->createRayQuery(Ray());
 }
 
-std::pair<std::string, float> MWScene::getFacedHandle()
+std::pair<std::string, float> MWScene::getFacedHandle (MWWorld::World& world)
 {
     std::string handle = "";
     float distance = -1;
@@ -57,10 +61,14 @@ std::pair<std::string, float> MWScene::getFacedHandle()
     {
         // there seem to be omnipresent objects like the caelum sky dom,
         // the distance of these objects is always 0 so this if excludes these
-        // TODO: Check if the object can be focused (ignore walls etc..
-        // in this state of openmw not possible)
         if ( itr->movable && itr->distance >= 0.1)
         {
+            // horrible hack to exclude statics. this must be removed as soon as a replacement for the
+            // AABB raycasting is implemented (we should not ignore statics)
+            MWWorld::Ptr ptr = world.getPtrViaHandle (itr->movable->getParentSceneNode()->getName());
+            if (ptr.getType()==typeid (ESM::Static))
+                break;
+
             if ( nearest == result.end() )  //if no object is set
             {
                 nearest = itr;
@@ -80,4 +88,3 @@ std::pair<std::string, float> MWScene::getFacedHandle()
 
     return std::pair<std::string, float>(handle, distance);
 }
-
diff --git a/apps/openmw/mwrender/mwscene.hpp b/apps/openmw/mwrender/mwscene.hpp
index ce04efc92..9d2a51bae 100644
--- a/apps/openmw/mwrender/mwscene.hpp
+++ b/apps/openmw/mwrender/mwscene.hpp
@@ -13,6 +13,11 @@ namespace Ogre
     class RaySceneQuery;
 }
 
+namespace MWWorld
+{
+    class World;
+}
+
 namespace MWRender
 {
   /** Class responsible for Morrowind-specific interfaces to OGRE.
@@ -43,7 +48,7 @@ namespace MWRender
     //pair<name, distance>
     //name is empty and distance = -1 if there is no object which
     //can be faced
-    std::pair<std::string, float> getFacedHandle();
+    std::pair<std::string, float> getFacedHandle (MWWorld::World& world);
   };
 }
 
diff --git a/apps/openmw/mwrender/playerpos.cpp b/apps/openmw/mwrender/playerpos.cpp
new file mode 100644
index 000000000..4a5e6628f
--- /dev/null
+++ b/apps/openmw/mwrender/playerpos.cpp
@@ -0,0 +1,18 @@
+
+#include "playerpos.hpp"
+
+#include "../mwworld/world.hpp"
+
+namespace MWRender
+{
+    void PlayerPos::setPos(float x, float y, float z, bool updateCamera)
+    {
+        mWorld.moveObject (getPlayer(), x, y, z);
+
+        if (updateCamera)
+            camera->setPosition (Ogre::Vector3 (
+                mPlayer.ref.pos.pos[0],
+                mPlayer.ref.pos.pos[2],
+                -mPlayer.ref.pos.pos[1]));
+    }
+}
diff --git a/apps/openmw/mwrender/playerpos.hpp b/apps/openmw/mwrender/playerpos.hpp
index 48a4fd8d5..59a0e1b41 100644
--- a/apps/openmw/mwrender/playerpos.hpp
+++ b/apps/openmw/mwrender/playerpos.hpp
@@ -8,6 +8,11 @@
 #include "../mwworld/refdata.hpp"
 #include "../mwworld/ptr.hpp"
 
+namespace MWWorld
+{
+    class World;
+}
+
 namespace MWRender
 {
   // This class keeps track of the player position. It takes care of
@@ -18,31 +23,19 @@ namespace MWRender
     ESMS::LiveCellRef<ESM::NPC, MWWorld::RefData> mPlayer;
     MWWorld::Ptr::CellStore *mCellStore;
     Ogre::Camera *camera;
+    MWWorld::World& mWorld;
 
   public:
-    PlayerPos(Ogre::Camera *cam, const ESM::NPC *player) :
-      mCellStore (0), camera(cam)
+    PlayerPos(Ogre::Camera *cam, const ESM::NPC *player, MWWorld::World& world) :
+      mCellStore (0), camera(cam), mWorld (world)
     {
         mPlayer.base = player;
         mPlayer.ref.pos.pos[0] = mPlayer.ref.pos.pos[1] = mPlayer.ref.pos.pos[2] = 0;
     }
 
     // Set the player position. Uses Morrowind coordinates.
-    void setPos(float _x, float _y, float _z, bool updateCamera = false)
-    {
-      mPlayer.ref.pos.pos[0] = _x;
-      mPlayer.ref.pos.pos[1] = _y;
-      mPlayer.ref.pos.pos[2] = _z;
+    void setPos(float _x, float _y, float _z, bool updateCamera = false);
 
-        if (updateCamera)
-            camera->setPosition (Ogre::Vector3 (
-                mPlayer.ref.pos.pos[0],
-                mPlayer.ref.pos.pos[2],
-                mPlayer.ref.pos.pos[1]));
-
-      // TODO: Update sound listener
-    }
-    
     void setCell (MWWorld::Ptr::CellStore *cellStore)
     {
         mCellStore = cellStore;
@@ -54,7 +47,6 @@ namespace MWRender
     // orientation. After the call, the new position is returned.
     void moveRel(float &relX, float &relY, float &relZ)
     {
-      // TODO: Update mPlayer state
       using namespace Ogre;
 
       // Move camera relative to its own direction
@@ -75,7 +67,7 @@ namespace MWRender
       // Set the position
       setPos(relX, relY, relZ);
     }
-    
+
         MWWorld::Ptr getPlayer()
         {
             MWWorld::Ptr ptr (&mPlayer, mCellStore);
diff --git a/apps/openmw/mwscript/cellextensions.cpp b/apps/openmw/mwscript/cellextensions.cpp
index 963cb5af8..7d633b59d 100644
--- a/apps/openmw/mwscript/cellextensions.cpp
+++ b/apps/openmw/mwscript/cellextensions.cpp
@@ -18,50 +18,79 @@ namespace MWScript
         class OpCellChanged : public Interpreter::Opcode0
         {
             public:
-            
+
                 virtual void execute (Interpreter::Runtime& runtime)
                 {
                     InterpreterContext& context
                         = static_cast<InterpreterContext&> (runtime.getContext());
-                        
+
                     runtime.push (context.getWorld().hasCellChanged() ? 1 : 0);
-                } 
+                }
         };
 
         class OpCOC : public Interpreter::Opcode0
         {
             public:
-            
+
                 virtual void execute (Interpreter::Runtime& runtime)
                 {
                     InterpreterContext& context
                         = static_cast<InterpreterContext&> (runtime.getContext());
-                        
+
                     std::string cell = runtime.getStringLiteral (runtime[0].mInteger);
-                    runtime.pop();                        
-                        
+                    runtime.pop();
+
                     ESM::Position pos;
                     pos.pos[0] = pos.pos[1] = pos.pos[2] = 0;
                     pos.rot[0] = pos.rot[1] = pos.rot[2] = 0;
                     context.getWorld().changeCell (cell, pos);
-                } 
+                }
+        };
+
+        class OpCOE : public Interpreter::Opcode0
+        {
+            public:
+
+                virtual void execute (Interpreter::Runtime& runtime)
+                {
+                    InterpreterContext& context
+                        = static_cast<InterpreterContext&> (runtime.getContext());
+
+                    Interpreter::Type_Integer x = runtime[0].mInteger;
+                    runtime.pop();
+
+                    Interpreter::Type_Integer y = runtime[0].mInteger;
+                    runtime.pop();
+
+                    ESM::Position pos;
+
+                    context.getWorld().indexToPosition (x, y, pos.pos[0], pos.pos[1]);
+                    pos.pos[2] = 0;
+
+                    pos.rot[0] = pos.rot[1] = pos.rot[2] = 0;
+
+                    context.getWorld().changeToExteriorCell (pos);
+                }
         };
-    
+
         const int opcodeCellChanged = 0x2000000;
         const int opcodeCOC = 0x2000026;
-    
+        const int opcodeCOE = 0x200007c;
+
         void registerExtensions (Compiler::Extensions& extensions)
         {
             extensions.registerFunction ("cellchanged", 'l', "", opcodeCellChanged);
             extensions.registerInstruction ("coc", "S", opcodeCOC);
             extensions.registerInstruction ("centeroncell", "S", opcodeCOC);
+            extensions.registerInstruction ("coe", "ll", opcodeCOE);
+            extensions.registerInstruction ("centeronexterior", "ll", opcodeCOE);
         }
-        
+
         void installOpcodes (Interpreter::Interpreter& interpreter)
         {
             interpreter.installSegment5 (opcodeCellChanged, new OpCellChanged);
             interpreter.installSegment5 (opcodeCOC, new OpCOC);
+            interpreter.installSegment5 (opcodeCOE, new OpCOE);
         }
     }
 }
-
diff --git a/apps/openmw/mwscript/docs/vmformat.txt b/apps/openmw/mwscript/docs/vmformat.txt
index 0556450e6..5eee9dd55 100644
--- a/apps/openmw/mwscript/docs/vmformat.txt
+++ b/apps/openmw/mwscript/docs/vmformat.txt
@@ -88,6 +88,10 @@ op 0x2000078: GetItemCount
 op 0x2000079: GetItemCount, explicit reference
 op 0x200007a: RemoveItem
 op 0x200007b: RemoveItem, explicit reference
+<<<<<<< HEAD:apps/openmw/mwscript/docs/vmformat.txt
+op 0x200007c: COC
+opcodes 0x200007d-0x3ffffff unused
+=======
 op 0x200007c: GetAiPackageDone
 op 0x200007d: GetAiPackageDone, explicit reference
 op 0x200007e-0x2000084: Enable Controls
@@ -95,3 +99,4 @@ op 0x2000085-0x200008b: Disable Controls
 op 0x200008c: Unlock
 op 0x200008d: Unlock, explicit reference
 opcodes 0x200008e-0x3ffffff unused
+>>>>>>> master:apps/openmw/mwscript/docs/vmformat.txt
diff --git a/apps/openmw/mwworld/actionteleport.cpp b/apps/openmw/mwworld/actionteleport.cpp
index f757b70be..3db294818 100644
--- a/apps/openmw/mwworld/actionteleport.cpp
+++ b/apps/openmw/mwworld/actionteleport.cpp
@@ -13,6 +13,9 @@ namespace MWWorld
 
     void ActionTeleportPlayer::execute (Environment& environment)
     {
-        environment.mWorld->changeCell (mCellName, mPosition);
+        if (mCellName.empty())
+            environment.mWorld->changeToExteriorCell (mPosition);
+        else
+            environment.mWorld->changeCell (mCellName, mPosition);
     }
 }
diff --git a/apps/openmw/mwworld/actionteleport.hpp b/apps/openmw/mwworld/actionteleport.hpp
index 78a55fba2..e4c972a9e 100644
--- a/apps/openmw/mwworld/actionteleport.hpp
+++ b/apps/openmw/mwworld/actionteleport.hpp
@@ -17,6 +17,7 @@ namespace MWWorld
         public:
 
             ActionTeleportPlayer (const std::string& cellName, const ESM::Position& position);
+            ///< If cellName is empty, an exterior cell is asumed.
 
             virtual void execute (Environment& environment);
     };
diff --git a/apps/openmw/mwworld/world.cpp b/apps/openmw/mwworld/world.cpp
index 4ef20c7ff..496da44ef 100644
--- a/apps/openmw/mwworld/world.cpp
+++ b/apps/openmw/mwworld/world.cpp
@@ -8,6 +8,7 @@
 
 #include "../mwrender/sky.hpp"
 #include "../mwrender/interior.hpp"
+#include "../mwrender/exterior.hpp"
 
 #include "../mwmechanics/mechanicsmanager.hpp"
 
@@ -249,6 +250,66 @@ namespace MWWorld
         throw std::runtime_error ("month out of range");
     }
 
+    void World::removeScripts (Ptr::CellStore *cell)
+    {
+        ScriptList::iterator iter = mLocalScripts.begin();
+
+        while (iter!=mLocalScripts.end())
+        {
+            if (iter->second.getCell()==cell)
+                mLocalScripts.erase (iter++);
+            else
+                ++iter;
+        }
+    }
+
+    void World::unloadCell (CellRenderCollection::iterator iter)
+    {
+        removeScripts (iter->first);
+        mEnvironment.mMechanicsManager->dropActors (iter->first);
+        iter->second->destroy();
+        mEnvironment.mSoundManager->stopSound (iter->first);
+        delete iter->second;
+        mActiveCells.erase (iter);
+    }
+
+    void World::loadCell (Ptr::CellStore *cell, MWRender::CellRender *render)
+    {
+        // register local scripts
+        insertInteriorScripts (*cell);
+
+        // This connects the cell data with the rendering scene.
+        std::pair<CellRenderCollection::iterator, bool> result =
+            mActiveCells.insert (std::make_pair (cell, render));
+
+        if (result.second)
+        {
+            // Load the cell and insert it into the renderer
+            result.first->second->show();
+        }
+    }
+
+    void World::playerCellChange (Ptr::CellStore *cell, const ESM::Position& position)
+    {
+        mPlayerPos->setPos (position.pos[0], position.pos[1], position.pos[2], true);
+        mPlayerPos->setCell (cell);
+        // TODO orientation
+
+        mEnvironment.mMechanicsManager->addActor (mPlayerPos->getPlayer());
+        mEnvironment.mMechanicsManager->watchActor (mPlayerPos->getPlayer());
+    }
+
+
+    void World::adjustSky()
+    {
+        if (mSky)
+        {
+            toggleSky();
+            // TODO set weather
+            toggleSky();
+        }
+    }
+
     World::World (OEngine::Render::OgreRenderer& renderer, const boost::filesystem::path& dataDir,
         const std::string& master, bool newGame, Environment& environment)
     : mSkyManager (0), mScene (renderer), mPlayerPos (0), mCurrentCell (0), mGlobalVariables (0),
@@ -263,7 +324,7 @@ namespace MWWorld
         mEsm.open (masterPath.file_string());
         mStore.load (mEsm);
 
-        mPlayerPos = new MWRender::PlayerPos (mScene.getCamera(), mStore.npcs.find ("player"));
+        mPlayerPos = new MWRender::PlayerPos (mScene.getCamera(), mStore.npcs.find ("player"), *this);
 
         // global variables
         mGlobalVariables = new Globals (mStore);
@@ -522,57 +583,114 @@ namespace MWWorld
 
     void World::changeCell (const std::string& cellName, const ESM::Position& position)
     {
+        // remove active
+        CellRenderCollection::iterator active = mActiveCells.begin();
+
+        while (active!=mActiveCells.end())
+        {
+            unloadCell (active++);
+        }
+
         // Load cell.
         mInteriors[cellName].loadInt (cellName, mStore, mEsm);
         Ptr::CellStore *cell = &mInteriors[cellName];
 
+        loadCell (cell, new MWRender::InteriorCellRender (*cell, mEnvironment, mScene));
+
+        // adjust player
+        mCurrentCell = cell;
+        playerCellChange (cell, position);
+
+        // Sky system
+        adjustSky();
+
+        mCellChanged = true;
+    }
+
+    void World::changeCell (int X, int Y, const ESM::Position& position)
+    {
         // remove active
         CellRenderCollection::iterator active = mActiveCells.begin();
 
-        if (active!=mActiveCells.end())
+        while (active!=mActiveCells.end())
         {
-            mEnvironment.mMechanicsManager->dropActors (active->first);
-            active->second->destroy();
-            mEnvironment.mSoundManager->stopSound (active->first);
-            delete active->second;
-            mActiveCells.erase (active);
+            if (!(active->first->cell->data.flags & ESM::Cell::Interior))
+            {
+                if (std::abs (X-active->first->cell->data.gridX)<=1 &&
+                    std::abs (Y-active->first->cell->data.gridY)<=1)
+                {
+                    // keep cells within the new 3x3 grid
+                    ++active;
+                    continue;
+                }
+            }
+
+            unloadCell (active++);
         }
 
-        // register local scripts
-        mLocalScripts.clear(); // FIXME won't work with exteriors
-        insertInteriorScripts (*cell);
+        // Load cells
+        for (int x=X-1; x<=X+1; ++x)
+            for (int y=Y-1; y<=Y+1; ++y)
+            {
+                CellRenderCollection::iterator iter = mActiveCells.begin();
 
-        // adjust player
-        mPlayerPos->setPos (position.pos[0], position.pos[1], position.pos[2], true);
-        mPlayerPos->setCell (cell);
-        // TODO orientation
+                while (iter!=mActiveCells.end())
+                {
+                    assert (!(iter->first->cell->data.flags & ESM::Cell::Interior));
 
-        // This connects the cell data with the rendering scene.
-        std::pair<CellRenderCollection::iterator, bool> result =
-            mActiveCells.insert (std::make_pair (cell,
-            new MWRender::InteriorCellRender (*cell, mEnvironment, mScene)));
+                    if (x==iter->first->cell->data.gridX &&
+                        y==iter->first->cell->data.gridY)
+                        break;
 
-        if (result.second)
+                    ++iter;
+                }
+
+                if (iter==mActiveCells.end())
+                {
+                    mExteriors[std::make_pair (x, y)].loadExt (x, y, mStore, mEsm);
+                    Ptr::CellStore *cell = &mExteriors[std::make_pair (x, y)];
+
+                    loadCell (cell, new MWRender::ExteriorCellRender (*cell, mEnvironment, mScene));
+                }
+            }
+
+        // find current cell
+        CellRenderCollection::iterator iter = mActiveCells.begin();
+
+        while (iter!=mActiveCells.end())
         {
-            // Load the cell and insert it into the renderer
-            result.first->second->show();
+            assert (!(iter->first->cell->data.flags & ESM::Cell::Interior));
+
+            if (X==iter->first->cell->data.gridX &&
+                Y==iter->first->cell->data.gridY)
+                break;
+
+            ++iter;
         }
 
-        // Actors
-        mEnvironment.mMechanicsManager->addActor (mPlayerPos->getPlayer());
-        mEnvironment.mMechanicsManager->watchActor (mPlayerPos->getPlayer());
+        assert (iter!=mActiveCells.end());
+
+        mCurrentCell = iter->first;
+
+        // adjust player
+        playerCellChange (&mExteriors[std::make_pair (X, Y)], position);
 
         // Sky system
-        if (mSky)
-        {
-            toggleSky();
-            // TODO set weather
-            toggleSky();
-        }
+        adjustSky();
 
         mCellChanged = true;
     }
 
+    void World::changeToExteriorCell (const ESM::Position& position)
+    {
+        int x = 0;
+        int y = 0;
+
+        positionToIndex (position.pos[0], position.pos[1], x, y);
+
+        changeCell (x, y, position);
+    }
+
     void World::markCellAsUnchanged()
     {
         mCellChanged = false;
@@ -580,7 +698,7 @@ namespace MWWorld
 
     std::string World::getFacedHandle()
     {
-        std::pair<std::string, float> result = mScene.getFacedHandle();
+        std::pair<std::string, float> result = mScene.getFacedHandle (*this);
 
         if (result.first.empty() ||
             result.second>getStore().gameSettings.find ("iMaxActivateDist")->i)
@@ -608,4 +726,56 @@ namespace MWWorld
             }
         }
     }
+
+    void World::moveObject (Ptr ptr, float x, float y, float z)
+    {
+        ptr.getCellRef().pos.pos[0] = x;
+        ptr.getCellRef().pos.pos[1] = y;
+        ptr.getCellRef().pos.pos[2] = z;
+
+        if (ptr==mPlayerPos->getPlayer())
+        {
+            if (mCurrentCell)
+            {
+                if (!(mCurrentCell->cell->data.flags & ESM::Cell::Interior))
+                {
+                    // exterior -> adjust loaded cells
+                    int cellX = 0;
+                    int cellY = 0;
+
+                    positionToIndex (x, y, cellX, cellY);
+
+                    if (mCurrentCell->cell->data.gridX!=cellX || mCurrentCell->cell->data.gridY!=cellY)
+                    {
+                        changeCell (cellX, cellY, mPlayerPos->getPlayer().getCellRef().pos);
+                    }
+                }
+            }
+        }
+
+        // TODO cell change for non-player ref
+    }
+
+    void World::indexToPosition (int cellX, int cellY, float &x, float &y) const
+    {
+        const int cellSize = 8192;
+
+        x = cellSize * cellX;
+        y = cellSize * cellY;
+    }
+
+    void World::positionToIndex (float x, float y, int &cellX, int &cellY) const
+    {
+        const int cellSize = 8192;
+
+        cellX = static_cast<int> (x/cellSize);
+
+        if (x<0)
+            --cellX;
+
+        cellY = static_cast<int> (y/cellSize);
+
+        if (y<0)
+            --cellY;
+    }
 }
diff --git a/apps/openmw/mwworld/world.hpp b/apps/openmw/mwworld/world.hpp
index 2a7b8009a..2ff2d3ccc 100644
--- a/apps/openmw/mwworld/world.hpp
+++ b/apps/openmw/mwworld/world.hpp
@@ -41,7 +41,7 @@ namespace MWWorld
     {
         public:
 
-            typedef std::vector<std::pair<std::string, Ptr> > ScriptList;
+            typedef std::list<std::pair<std::string, Ptr> > ScriptList;
 
         private:
 
@@ -56,6 +56,7 @@ namespace MWWorld
             ESM::ESMReader mEsm;
             ESMS::ESMStore mStore;
             std::map<std::string, Ptr::CellStore> mInteriors;
+            std::map<std::pair<int, int>, Ptr::CellStore> mExteriors;
             ScriptList mLocalScripts;
             MWWorld::Globals *mGlobalVariables;
             bool mSky;
@@ -76,6 +77,16 @@ namespace MWWorld
 
             int getDaysPerMonth (int month) const;
 
+            void removeScripts (Ptr::CellStore *cell);
+
+            void unloadCell (CellRenderCollection::iterator iter);
+
+            void loadCell (Ptr::CellStore *cell, MWRender::CellRender *render);
+
+            void playerCellChange (Ptr::CellStore *cell, const ESM::Position& position);
+
+            void adjustSky();
+
         public:
 
            World (OEngine::Render::OgreRenderer& renderer, const boost::filesystem::path& master,
@@ -130,12 +141,24 @@ namespace MWWorld
             void changeCell (const std::string& cellName, const ESM::Position& position);
             ///< works only for interior cells currently.
 
+            void changeCell (int X, int Y, const ESM::Position& position);
+
+            void changeToExteriorCell (const ESM::Position& position);
+
             void markCellAsUnchanged();
 
             std::string getFacedHandle();
             ///< Return handle of the object the player is looking at
 
             void deleteObject (Ptr ptr);
+
+            void moveObject (Ptr ptr, float x, float y, float z);
+
+            void indexToPosition (int cellX, int cellY, float &x, float &y) const;
+            ///< Convert cell numbers to position.
+
+            void positionToIndex (float x, float y, int &cellX, int &cellY) const;
+            ///< Convert position to cell numbers
     };
 }
 
diff --git a/components/esm_store/cell_store.hpp b/components/esm_store/cell_store.hpp
index a150ec3d3..6acd81dce 100644
--- a/components/esm_store/cell_store.hpp
+++ b/components/esm_store/cell_store.hpp
@@ -123,7 +123,14 @@ namespace ESMS
     /** Ditto for exterior cell. */
     void loadExt(int X, int Y, const ESMStore &store, ESMReader &esm)
     {
+        std::cout << "loading exterior cell '" << X << ", " << Y << "'\n";
 
+        cell = store.cells.searchExt (X, Y);
+
+        if(cell == NULL)
+            throw std::runtime_error("Exterior cell not found");
+
+        loadRefs(store, esm);
     }
 
   private:
diff --git a/components/esm_store/reclists.hpp b/components/esm_store/reclists.hpp
index 3cdb7f7b2..3711a20b1 100644
--- a/components/esm_store/reclists.hpp
+++ b/components/esm_store/reclists.hpp
@@ -194,6 +194,21 @@ namespace ESMS
       return it->second;
     }
 
+    const Cell *searchExt (int x, int y) const
+    {
+        ExtCells::const_iterator it = extCells.find (x);
+
+        if (it==extCells.end())
+            return 0;
+
+        ExtCellsCol::const_iterator it2 = it->second.find (y);
+
+        if (it2 == it->second.end())
+            return 0;
+
+        return it2->second;
+    }
+
     void load(ESMReader &esm, const std::string &id)
     {
       using namespace std;