diff --git a/apps/openmw/mwbase/world.hpp b/apps/openmw/mwbase/world.hpp
index db6bda1419..bd7583f404 100644
--- a/apps/openmw/mwbase/world.hpp
+++ b/apps/openmw/mwbase/world.hpp
@@ -601,6 +601,8 @@ namespace MWBase
 
             virtual void updateActorPath(const MWWorld::ConstPtr& actor, const std::deque<osg::Vec3f>& path,
                     const osg::Vec3f& halfExtents, const osg::Vec3f& start, const osg::Vec3f& end) const = 0;
+
+            virtual void setNavMeshNumberToRender(const std::size_t value) = 0;
     };
 }
 
diff --git a/apps/openmw/mwrender/navmesh.cpp b/apps/openmw/mwrender/navmesh.cpp
index 787e332e92..23f4a8d58b 100644
--- a/apps/openmw/mwrender/navmesh.cpp
+++ b/apps/openmw/mwrender/navmesh.cpp
@@ -31,12 +31,13 @@ namespace MWRender
         return mEnabled;
     }
 
-    void NavMesh::update(const DetourNavigator::SharedNavMesh& sharedNavMesh, std::size_t generation,
-                         std::size_t revision, const DetourNavigator::Settings& settings)
+    void NavMesh::update(const DetourNavigator::SharedNavMesh& sharedNavMesh, const std::size_t id,
+        const std::size_t generation, const std::size_t revision, const DetourNavigator::Settings& settings)
     {
-        if (!mEnabled || (mGeneration >= generation && mRevision >= revision))
+        if (!mEnabled || (mId == id && mGeneration >= generation && mRevision >= revision))
             return;
 
+        mId = id;
         mGeneration = generation;
         mRevision = revision;
         if (mGroup)
@@ -49,6 +50,12 @@ namespace MWRender
         }
     }
 
+    void NavMesh::reset()
+    {
+        if (mGroup)
+            mRootNode->removeChild(mGroup);
+    }
+
     void NavMesh::enable()
     {
         if (mGroup)
@@ -58,8 +65,7 @@ namespace MWRender
 
     void NavMesh::disable()
     {
-        if (mGroup)
-            mRootNode->removeChild(mGroup);
+        reset();
         mEnabled = false;
     }
 }
diff --git a/apps/openmw/mwrender/navmesh.hpp b/apps/openmw/mwrender/navmesh.hpp
index 0bed616f9c..34e71a70c2 100644
--- a/apps/openmw/mwrender/navmesh.hpp
+++ b/apps/openmw/mwrender/navmesh.hpp
@@ -21,9 +21,12 @@ namespace MWRender
 
         bool toggle();
 
-        void update(const DetourNavigator::SharedNavMesh& sharedNavMesh, std::size_t generation, std::size_t revision,
+        void update(const DetourNavigator::SharedNavMesh& sharedNavMesh,
+                    const std::size_t number, const std::size_t generation, const std::size_t revision,
                     const DetourNavigator::Settings& settings);
 
+        void reset();
+
         void enable();
 
         void disable();
@@ -31,6 +34,7 @@ namespace MWRender
     private:
         osg::ref_ptr<osg::Group> mRootNode;
         bool mEnabled;
+        std::size_t mId = std::numeric_limits<std::size_t>::max();
         std::size_t mGeneration;
         std::size_t mRevision;
         osg::ref_ptr<osg::Group> mGroup;
diff --git a/apps/openmw/mwrender/renderingmanager.cpp b/apps/openmw/mwrender/renderingmanager.cpp
index 5c0a3347cb..bc540d7e60 100644
--- a/apps/openmw/mwrender/renderingmanager.cpp
+++ b/apps/openmw/mwrender/renderingmanager.cpp
@@ -600,12 +600,20 @@ namespace MWRender
         }
 
         const auto navMeshes = mNavigator.getNavMeshes();
-        if (!navMeshes.empty())
+
+        auto it = navMeshes.begin();
+        for (std::size_t i = 0; it != navMeshes.end() && i < mNavMeshNumber; ++i)
+            ++it;
+        if (it == navMeshes.end())
+        {
+            mNavMesh->reset();
+        }
+        else
         {
             try
             {
-                mNavMesh->update(navMeshes.begin()->second->mValue, navMeshes.begin()->second->mGeneration,
-                                 navMeshes.begin()->second->mNavMeshRevision, mNavigator.getSettings());
+                mNavMesh->update(it->second->mValue, mNavMeshNumber, it->second->mGeneration,
+                                 it->second->mNavMeshRevision, mNavigator.getSettings());
             }
             catch (const std::exception& e)
             {
@@ -1388,4 +1396,9 @@ namespace MWRender
     {
         mActorsPaths->remove(actor);
     }
+
+    void RenderingManager::setNavMeshNumber(const std::size_t value)
+    {
+        mNavMeshNumber = value;
+    }
 }
diff --git a/apps/openmw/mwrender/renderingmanager.hpp b/apps/openmw/mwrender/renderingmanager.hpp
index 76ec674453..7a4500ac90 100644
--- a/apps/openmw/mwrender/renderingmanager.hpp
+++ b/apps/openmw/mwrender/renderingmanager.hpp
@@ -228,6 +228,8 @@ namespace MWRender
 
         void removeActorPath(const MWWorld::ConstPtr& actor) const;
 
+        void setNavMeshNumber(const std::size_t value);
+
     private:
         void updateProjectionMatrix();
         void updateTextureFiltering();
@@ -254,6 +256,7 @@ namespace MWRender
 
         DetourNavigator::Navigator& mNavigator;
         std::unique_ptr<NavMesh> mNavMesh;
+        std::size_t mNavMeshNumber = 0;
         std::unique_ptr<ActorsPaths> mActorsPaths;
         std::unique_ptr<Pathgrid> mPathgrid;
         std::unique_ptr<Objects> mObjects;
diff --git a/apps/openmw/mwscript/docs/vmformat.txt b/apps/openmw/mwscript/docs/vmformat.txt
index bc7d93a136..d346ab6e43 100644
--- a/apps/openmw/mwscript/docs/vmformat.txt
+++ b/apps/openmw/mwscript/docs/vmformat.txt
@@ -457,5 +457,6 @@ op 0x2000306: OnActivate, explicit
 op 0x2000307: ToggleBorders, tb
 op 0x2000308: ToggleNavMesh
 op 0x2000309: ToggleActorsPaths
+op 0x200030a: SetNavMeshNumber
 
-opcodes 0x200030a-0x3ffffff unused
+opcodes 0x200030b-0x3ffffff unused
diff --git a/apps/openmw/mwscript/miscextensions.cpp b/apps/openmw/mwscript/miscextensions.cpp
index 8507b7628e..0cf2fc464b 100644
--- a/apps/openmw/mwscript/miscextensions.cpp
+++ b/apps/openmw/mwscript/miscextensions.cpp
@@ -1345,6 +1345,25 @@ namespace MWScript
                 }
         };
 
+        class OpSetNavMeshNumberToRender : public Interpreter::Opcode0
+        {
+            public:
+
+                virtual void execute (Interpreter::Runtime& runtime)
+                {
+                    const auto navMeshNumber = runtime[0].mInteger;
+                    runtime.pop();
+
+                    if (navMeshNumber < 0)
+                    {
+                        runtime.getContext().report("Invalid navmesh number: use not less than zero values");
+                        return;
+                    }
+
+                    MWBase::Environment::get().getWorld()->setNavMeshNumberToRender(static_cast<std::size_t>(navMeshNumber));
+                }
+        };
+
         void installOpcodes (Interpreter::Interpreter& interpreter)
         {
             interpreter.installSegment5 (Compiler::Misc::opcodeXBox, new OpXBox);
@@ -1447,6 +1466,7 @@ namespace MWScript
             interpreter.installSegment5 (Compiler::Misc::opcodeToggleBorders, new OpToggleBorders);
             interpreter.installSegment5 (Compiler::Misc::opcodeToggleNavMesh, new OpToggleNavMesh);
             interpreter.installSegment5 (Compiler::Misc::opcodeToggleActorsPaths, new OpToggleActorsPaths);
+            interpreter.installSegment5 (Compiler::Misc::opcodeSetNavMeshNumberToRender, new OpSetNavMeshNumberToRender);
         }
     }
 }
diff --git a/apps/openmw/mwworld/scene.cpp b/apps/openmw/mwworld/scene.cpp
index f68f1008c0..18ceffba42 100644
--- a/apps/openmw/mwworld/scene.cpp
+++ b/apps/openmw/mwworld/scene.cpp
@@ -175,8 +175,10 @@ namespace
         }
         else if (const auto actor = physics.getActor(ptr))
         {
-            const auto playerHalfExtents = physics.getHalfExtents(MWBase::Environment::get().getWorld()->getPlayerPtr());
-            navigator.addAgent(playerHalfExtents);
+            const auto halfExtents = ptr.getCell()->isExterior()
+                ? physics.getHalfExtents(MWBase::Environment::get().getWorld()->getPlayerPtr())
+                : actor->getHalfExtents();
+            navigator.addAgent(halfExtents);
         }
     }
 
@@ -344,7 +346,7 @@ namespace MWWorld
                 navigator->removeObject(reinterpret_cast<std::size_t>(object));
             else if (const auto actor = mPhysics->getActor(ptr))
             {
-                navigator->removeAgent(playerHalfExtents);
+                navigator->removeAgent(ptr.getCell()->isExterior() ? playerHalfExtents : actor->getHalfExtents());
                 mRendering.removeActorPath(ptr);
             }
             mPhysics->remove(ptr);
@@ -812,8 +814,10 @@ namespace MWWorld
         }
         else if (const auto actor = mPhysics->getActor(ptr))
         {
-            const auto playerHalfExtents = mPhysics->getHalfExtents(MWBase::Environment::get().getWorld()->getPlayerPtr());
-            navigator->removeAgent(playerHalfExtents);
+            const auto& halfExtents = ptr.getCell()->isExterior()
+                ? mPhysics->getHalfExtents(MWBase::Environment::get().getWorld()->getPlayerPtr())
+                : actor->getHalfExtents();
+            navigator->removeAgent(halfExtents);
         }
         mPhysics->remove(ptr);
         mRendering.removeObject (ptr);
diff --git a/apps/openmw/mwworld/worldimp.cpp b/apps/openmw/mwworld/worldimp.cpp
index bfa6b5124a..6cfba1e260 100644
--- a/apps/openmw/mwworld/worldimp.cpp
+++ b/apps/openmw/mwworld/worldimp.cpp
@@ -3767,4 +3767,9 @@ namespace MWWorld
         mRendering->updateActorPath(actor, path, halfExtents, start, end);
     }
 
+    void World::setNavMeshNumberToRender(const std::size_t value)
+    {
+        mRendering->setNavMeshNumber(value);
+    }
+
 }
diff --git a/apps/openmw/mwworld/worldimp.hpp b/apps/openmw/mwworld/worldimp.hpp
index adf6ece3d3..49cae93ec6 100644
--- a/apps/openmw/mwworld/worldimp.hpp
+++ b/apps/openmw/mwworld/worldimp.hpp
@@ -703,6 +703,8 @@ namespace MWWorld
 
             void updateActorPath(const MWWorld::ConstPtr& actor, const std::deque<osg::Vec3f>& path,
                     const osg::Vec3f& halfExtents, const osg::Vec3f& start, const osg::Vec3f& end) const override;
+
+            void setNavMeshNumberToRender(const std::size_t value) override;
     };
 }
 
diff --git a/components/compiler/extensions0.cpp b/components/compiler/extensions0.cpp
index 241abfaa40..a640d76d89 100644
--- a/components/compiler/extensions0.cpp
+++ b/components/compiler/extensions0.cpp
@@ -322,6 +322,7 @@ namespace Compiler
             extensions.registerInstruction ("toggleborders", "", opcodeToggleBorders);
             extensions.registerInstruction ("togglenavmesh", "", opcodeToggleNavMesh);
             extensions.registerInstruction ("toggleactorspaths", "", opcodeToggleActorsPaths);
+            extensions.registerInstruction ("setnavmeshnumber", "l", opcodeSetNavMeshNumberToRender);
         }
     }
 
diff --git a/components/compiler/opcodes.hpp b/components/compiler/opcodes.hpp
index c591115ec2..a2d8a9467c 100644
--- a/components/compiler/opcodes.hpp
+++ b/components/compiler/opcodes.hpp
@@ -298,6 +298,7 @@ namespace Compiler
         const int opcodeToggleBorders = 0x2000307;
         const int opcodeToggleNavMesh = 0x2000308;
         const int opcodeToggleActorsPaths = 0x2000309;
+        const int opcodeSetNavMeshNumberToRender = 0x200030a;
     }
 
     namespace Sky
diff --git a/components/detournavigator/navmeshmanager.cpp b/components/detournavigator/navmeshmanager.cpp
index 07df5c7af3..67514b8b78 100644
--- a/components/detournavigator/navmeshmanager.cpp
+++ b/components/detournavigator/navmeshmanager.cpp
@@ -122,11 +122,16 @@ namespace DetourNavigator
     void NavMeshManager::update(osg::Vec3f playerPosition, const osg::Vec3f& agentHalfExtents)
     {
         const auto playerTile = getTilePosition(mSettings, toNavMeshCoordinates(mSettings, playerPosition));
-        if (mLastRecastMeshManagerRevision >= mRecastMeshManager.getRevision() && mPlayerTile
-                && *mPlayerTile == playerTile)
+        auto& lastRevision = mLastRecastMeshManagerRevision[agentHalfExtents];
+        auto lastPlayerTile = mPlayerTile.find(agentHalfExtents);
+        if (lastRevision >= mRecastMeshManager.getRevision() && lastPlayerTile != mPlayerTile.end()
+                && lastPlayerTile->second == playerTile)
             return;
-        mLastRecastMeshManagerRevision = mRecastMeshManager.getRevision();
-        mPlayerTile = playerTile;
+        lastRevision = mRecastMeshManager.getRevision();
+        if (lastPlayerTile == mPlayerTile.end())
+            lastPlayerTile = mPlayerTile.insert(std::make_pair(agentHalfExtents, playerTile)).first;
+        else
+            lastPlayerTile->second = playerTile;
         std::map<TilePosition, ChangeType> tilesToPost;
         const auto& cached = getCached(agentHalfExtents);
         const auto changedTiles = mChangedTiles.find(agentHalfExtents);
@@ -163,8 +168,8 @@ namespace DetourNavigator
         }
         mAsyncNavMeshUpdater.post(agentHalfExtents, cached, playerTile, tilesToPost);
         log("cache update posted for agent=", agentHalfExtents,
-            " playerTile=", *mPlayerTile,
-            " recastMeshManagerRevision=", mLastRecastMeshManagerRevision,
+            " playerTile=", lastPlayerTile->second,
+            " recastMeshManagerRevision=", lastRevision,
             " changedTiles=", changedTiles->second.size());
     }
 
diff --git a/components/detournavigator/navmeshmanager.hpp b/components/detournavigator/navmeshmanager.hpp
index acec44eb9e..cd8c55aa06 100644
--- a/components/detournavigator/navmeshmanager.hpp
+++ b/components/detournavigator/navmeshmanager.hpp
@@ -58,8 +58,8 @@ namespace DetourNavigator
         std::map<osg::Vec3f, std::map<TilePosition, ChangeType>> mChangedTiles;
         AsyncNavMeshUpdater mAsyncNavMeshUpdater;
         std::size_t mGenerationCounter = 0;
-        boost::optional<TilePosition> mPlayerTile;
-        std::size_t mLastRecastMeshManagerRevision = 0;
+        std::map<osg::Vec3f, TilePosition> mPlayerTile;
+        std::map<osg::Vec3f, std::size_t> mLastRecastMeshManagerRevision;
 
         void addChangedTiles(const btCollisionShape& shape, const btTransform& transform, const ChangeType changeType);