diff --git a/apps/navmeshtool/worldspacedata.cpp b/apps/navmeshtool/worldspacedata.cpp
index 742e6d775d..81bbd857f5 100644
--- a/apps/navmeshtool/worldspacedata.cpp
+++ b/apps/navmeshtool/worldspacedata.cpp
@@ -298,12 +298,14 @@ namespace NavMeshTool
                     const ObjectId objectId(++objectsCounter);
                     const CollisionShape shape(object.getShapeInstance(), *object.getCollisionObject().getCollisionShape(), object.getObjectTransform());
 
-                    navMeshInput.mTileCachedRecastMeshManager.addObject(objectId, shape, transform, DetourNavigator::AreaType_ground);
+                    navMeshInput.mTileCachedRecastMeshManager.addObject(objectId, shape, transform,
+                        DetourNavigator::AreaType_ground, [] (const auto&) {});
 
                     if (const btCollisionShape* avoid = object.getShapeInstance()->mAvoidCollisionShape.get())
                     {
                         const CollisionShape avoidShape(object.getShapeInstance(), *avoid, object.getObjectTransform());
-                        navMeshInput.mTileCachedRecastMeshManager.addObject(objectId, avoidShape, transform, DetourNavigator::AreaType_null);
+                        navMeshInput.mTileCachedRecastMeshManager.addObject(objectId, avoidShape, transform,
+                            DetourNavigator::AreaType_null, [] (const auto&) {});
                     }
 
                     data.mObjects.emplace_back(std::move(object));
diff --git a/apps/openmw/mwworld/scene.cpp b/apps/openmw/mwworld/scene.cpp
index 3b2f9cd608..1cb80389ce 100644
--- a/apps/openmw/mwworld/scene.cpp
+++ b/apps/openmw/mwworld/scene.cpp
@@ -534,6 +534,8 @@ namespace MWWorld
                 unloadCell (cell);
         }
 
+        mNavigator.updateBounds(pos);
+
         mCurrentGridCenter = osg::Vec2i(playerCellX, playerCellY);
         osg::Vec4i newGrid = gridCenterToBounds(mCurrentGridCenter);
         mRendering.setActiveGrid(newGrid);
@@ -821,6 +823,8 @@ namespace MWWorld
 
         loadingListener->setProgressRange(cell->count());
 
+        mNavigator.updateBounds(position.asVec3());
+
         // Load cell.
         mPagedRefs.clear();
         loadCell(cell, loadingListener, changeEvent, position.asVec3());
diff --git a/apps/openmw_test_suite/detournavigator/asyncnavmeshupdater.cpp b/apps/openmw_test_suite/detournavigator/asyncnavmeshupdater.cpp
index b23446cea7..71c013d9f4 100644
--- a/apps/openmw_test_suite/detournavigator/asyncnavmeshupdater.cpp
+++ b/apps/openmw_test_suite/detournavigator/asyncnavmeshupdater.cpp
@@ -40,7 +40,7 @@ namespace
             osg::ref_ptr<Resource::BulletShapeInstance>(new Resource::BulletShapeInstance(bulletShape)),
             shape, objectTransform
         );
-        recastMeshManager.addObject(id, collisionShape, btTransform::getIdentity(), AreaType_ground);
+        recastMeshManager.addObject(id, collisionShape, btTransform::getIdentity(), AreaType_ground, [] (auto) {});
     }
 
     struct DetourNavigatorAsyncNavMeshUpdaterTest : Test
diff --git a/apps/openmw_test_suite/detournavigator/operators.hpp b/apps/openmw_test_suite/detournavigator/operators.hpp
index fb6fcc5c39..60e1400764 100644
--- a/apps/openmw_test_suite/detournavigator/operators.hpp
+++ b/apps/openmw_test_suite/detournavigator/operators.hpp
@@ -12,14 +12,6 @@
 
 #include <gtest/gtest.h>
 
-namespace DetourNavigator
-{
-    static inline bool operator ==(const TileBounds& lhs, const TileBounds& rhs)
-    {
-        return lhs.mMin == rhs.mMin && lhs.mMax == rhs.mMax;
-    }
-}
-
 namespace
 {
     template <class T>
diff --git a/apps/openmw_test_suite/detournavigator/tilecachedrecastmeshmanager.cpp b/apps/openmw_test_suite/detournavigator/tilecachedrecastmeshmanager.cpp
index c637d35424..4803f452b3 100644
--- a/apps/openmw_test_suite/detournavigator/tilecachedrecastmeshmanager.cpp
+++ b/apps/openmw_test_suite/detournavigator/tilecachedrecastmeshmanager.cpp
@@ -16,7 +16,8 @@ namespace
     struct DetourNavigatorTileCachedRecastMeshManagerTest : Test
     {
         RecastSettings mSettings;
-        std::vector<TilePosition> mChangedTiles;
+        std::vector<TilePosition> mAddedTiles;
+        std::vector<std::pair<TilePosition, ChangeType>> mChangedTiles;
         const ObjectTransform mObjectTransform {ESM::Position {{0, 0, 0}, {0, 0, 0}}, 0.0f};
         const osg::ref_ptr<const Resource::BulletShape> mShape = new Resource::BulletShape;
         const osg::ref_ptr<const Resource::BulletShapeInstance> mInstance = new Resource::BulletShapeInstance(mShape);
@@ -29,9 +30,14 @@ namespace
             mSettings.mTileSize = 64;
         }
 
-        void onChangedTile(const TilePosition& tilePosition)
+        void onAddedTile(const TilePosition& tilePosition)
         {
-            mChangedTiles.push_back(tilePosition);
+            mAddedTiles.push_back(tilePosition);
+        }
+
+        void onChangedTile(const TilePosition& tilePosition, ChangeType changeType)
+        {
+            mChangedTiles.emplace_back(tilePosition, changeType);
         }
     };
 
@@ -60,16 +66,16 @@ namespace
         TileCachedRecastMeshManager manager(mSettings);
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        EXPECT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground));
+        EXPECT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {}));
     }
 
-    TEST_F(DetourNavigatorTileCachedRecastMeshManagerTest, add_object_for_existing_object_should_throw_exception)
+    TEST_F(DetourNavigatorTileCachedRecastMeshManagerTest, add_object_for_existing_object_should_return_false)
     {
         TileCachedRecastMeshManager manager(mSettings);
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground);
-        EXPECT_FALSE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground));
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
+        EXPECT_FALSE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {}));
     }
 
     TEST_F(DetourNavigatorTileCachedRecastMeshManagerTest, add_object_should_add_tiles)
@@ -78,26 +84,47 @@ namespace
         manager.setWorldspace("worldspace");
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        ASSERT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground));
+        ASSERT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {}));
         for (int x = -1; x < 1; ++x)
             for (int y = -1; y < 1; ++y)
                 ASSERT_NE(manager.getMesh("worldspace", TilePosition(x, y)), nullptr);
     }
 
+    TEST_F(DetourNavigatorTileCachedRecastMeshManagerTest, add_object_should_return_added_tiles)
+    {
+        TileCachedRecastMeshManager manager(mSettings);
+        const btBoxShape boxShape(btVector3(20, 20, 100));
+        const CollisionShape shape(mInstance, boxShape, mObjectTransform);
+        TileBounds bounds;
+        bounds.mMin = osg::Vec2f(182, 182);
+        bounds.mMax = osg::Vec2f(1000, 1000);
+        manager.setBounds(bounds);
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground,
+                          [&] (const auto& v) { onAddedTile(v); });
+        EXPECT_THAT(mAddedTiles, ElementsAre(TilePosition(0, 0)));
+    }
+
     TEST_F(DetourNavigatorTileCachedRecastMeshManagerTest, update_object_for_changed_object_should_return_changed_tiles)
     {
         TileCachedRecastMeshManager manager(mSettings);
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const btTransform transform(btMatrix3x3::getIdentity(), btVector3(getTileSize(mSettings) / mSettings.mRecastScaleFactor, 0, 0));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        manager.addObject(ObjectId(&boxShape), shape, transform, AreaType::AreaType_ground);
+        TileBounds bounds;
+        bounds.mMin = osg::Vec2f(-1000, -1000);
+        bounds.mMax = osg::Vec2f(1000, 1000);
+        manager.setBounds(bounds);
+        manager.addObject(ObjectId(&boxShape), shape, transform, AreaType::AreaType_ground, [] (auto) {});
         EXPECT_TRUE(manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground,
-                                         [&] (const auto& v) { onChangedTile(v); }));
-        EXPECT_THAT(
-            mChangedTiles,
-            ElementsAre(TilePosition(-1, -1), TilePosition(-1, 0), TilePosition(0, -1), TilePosition(0, 0),
-                        TilePosition(1, -1), TilePosition(1, 0))
-        );
+                                         [&] (const auto& ... v) { onChangedTile(v ...); }));
+        EXPECT_THAT(mChangedTiles, ElementsAre(
+            std::pair(TilePosition(-1, -1), ChangeType::add),
+            std::pair(TilePosition(-1, 0), ChangeType::add),
+            std::pair(TilePosition(0, -1), ChangeType::update),
+            std::pair(TilePosition(0, 0), ChangeType::update),
+            std::pair(TilePosition(1, -1), ChangeType::remove),
+            std::pair(TilePosition(1, 0), ChangeType::remove)
+        ));
     }
 
     TEST_F(DetourNavigatorTileCachedRecastMeshManagerTest, update_object_for_not_changed_object_should_return_empty)
@@ -105,10 +132,10 @@ namespace
         TileCachedRecastMeshManager manager(mSettings);
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
         EXPECT_FALSE(manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground,
-                                          [&] (const auto& v) { onChangedTile(v); }));
-        EXPECT_EQ(mChangedTiles, std::vector<TilePosition>());
+                                          [&] (const auto& ... v) { onChangedTile(v ...); }));
+        EXPECT_THAT(mChangedTiles, IsEmpty());
     }
 
     TEST_F(DetourNavigatorTileCachedRecastMeshManagerTest, get_mesh_after_add_object_should_return_recast_mesh_for_each_used_tile)
@@ -117,7 +144,7 @@ namespace
         manager.setWorldspace("worldspace");
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(-1, -1)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(-1, 0)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(0, -1)), nullptr);
@@ -130,26 +157,30 @@ namespace
         manager.setWorldspace("worldspace");
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
         EXPECT_EQ(manager.getMesh("worldspace", TilePosition(1, 0)), nullptr);
     }
 
     TEST_F(DetourNavigatorTileCachedRecastMeshManagerTest, get_mesh_for_moved_object_should_return_recast_mesh_for_each_used_tile)
     {
         TileCachedRecastMeshManager manager(mSettings);
+        TileBounds bounds;
+        bounds.mMin = osg::Vec2f(-1000, -1000);
+        bounds.mMax = osg::Vec2f(1000, 1000);
+        manager.setBounds(bounds);
         manager.setWorldspace("worldspace");
 
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const btTransform transform(btMatrix3x3::getIdentity(), btVector3(getTileSize(mSettings) / mSettings.mRecastScaleFactor, 0, 0));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
 
-        manager.addObject(ObjectId(&boxShape), shape, transform, AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, transform, AreaType::AreaType_ground, [] (auto) {});
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(0, -1)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(0, 0)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(1, 0)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(1, -1)), nullptr);
 
-        manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
+        manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto, auto) {});
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(-1, -1)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(-1, 0)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(0, -1)), nullptr);
@@ -165,11 +196,11 @@ namespace
         const btTransform transform(btMatrix3x3::getIdentity(), btVector3(getTileSize(mSettings) / mSettings.mRecastScaleFactor, 0, 0));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
 
-        manager.addObject(ObjectId(&boxShape), shape, transform, AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, transform, AreaType::AreaType_ground, [] (auto) {});
         EXPECT_EQ(manager.getMesh("worldspace", TilePosition(-1, -1)), nullptr);
         EXPECT_EQ(manager.getMesh("worldspace", TilePosition(-1, 0)), nullptr);
 
-        manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
+        manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto, auto) {});
         EXPECT_EQ(manager.getMesh("worldspace", TilePosition(1, 0)), nullptr);
         EXPECT_EQ(manager.getMesh("worldspace", TilePosition(1, -1)), nullptr);
     }
@@ -180,7 +211,7 @@ namespace
         manager.setWorldspace("worldspace");
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
         manager.removeObject(ObjectId(&boxShape));
         EXPECT_EQ(manager.getMesh("worldspace", TilePosition(-1, -1)), nullptr);
         EXPECT_EQ(manager.getMesh("worldspace", TilePosition(-1, 0)), nullptr);
@@ -195,13 +226,13 @@ namespace
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
 
-        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(-1, -1)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(-1, 0)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(0, -1)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(0, 0)), nullptr);
 
-        manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
+        manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto, auto) {});
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(-1, -1)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(-1, 0)), nullptr);
         EXPECT_NE(manager.getMesh("worldspace", TilePosition(0, -1)), nullptr);
@@ -214,7 +245,7 @@ namespace
         const auto initialRevision = manager.getRevision();
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
         EXPECT_EQ(manager.getRevision(), initialRevision + 1);
     }
 
@@ -223,9 +254,9 @@ namespace
         TileCachedRecastMeshManager manager(mSettings);
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
         const auto beforeAddRevision = manager.getRevision();
-        EXPECT_FALSE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground));
+        EXPECT_FALSE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {}));
         EXPECT_EQ(manager.getRevision(), beforeAddRevision);
     }
 
@@ -235,9 +266,9 @@ namespace
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const btTransform transform(btMatrix3x3::getIdentity(), btVector3(getTileSize(mSettings) / mSettings.mRecastScaleFactor, 0, 0));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        manager.addObject(ObjectId(&boxShape), shape, transform, AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, transform, AreaType::AreaType_ground, [] (auto) {});
         const auto beforeUpdateRevision = manager.getRevision();
-        manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
+        manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto, auto) {});
         EXPECT_EQ(manager.getRevision(), beforeUpdateRevision + 1);
     }
 
@@ -247,9 +278,9 @@ namespace
         manager.setWorldspace("worldspace");
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
         const auto beforeUpdateRevision = manager.getRevision();
-        manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
+        manager.updateObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto, auto) {});
         EXPECT_EQ(manager.getRevision(), beforeUpdateRevision);
     }
 
@@ -258,7 +289,7 @@ namespace
         TileCachedRecastMeshManager manager(mSettings);
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground);
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
         const auto beforeRemoveRevision = manager.getRevision();
         manager.removeObject(ObjectId(&boxShape));
         EXPECT_EQ(manager.getRevision(), beforeRemoveRevision + 1);
@@ -298,7 +329,7 @@ namespace
         manager.setWorldspace("worldspace");
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        ASSERT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground));
+        ASSERT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {}));
         const osg::Vec2i cellPosition(0, 0);
         const int cellSize = std::numeric_limits<int>::max();
         ASSERT_TRUE(manager.addWater(cellPosition, cellSize, 0.0f));
@@ -343,7 +374,7 @@ namespace
         manager.setWorldspace("worldspace");
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        ASSERT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground));
+        ASSERT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {}));
         const osg::Vec2i cellPosition(0, 0);
         const int cellSize = 8192;
         ASSERT_TRUE(manager.addWater(cellPosition, cellSize, 0.0f));
@@ -361,7 +392,7 @@ namespace
         const int cellSize = 8192;
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(mInstance, boxShape, mObjectTransform);
-        ASSERT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground));
+        ASSERT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {}));
         ASSERT_TRUE(manager.addWater(cellPosition, cellSize, 0.0f));
         ASSERT_TRUE(manager.removeObject(ObjectId(&boxShape)));
         for (int x = -1; x < 12; ++x)
@@ -375,10 +406,28 @@ namespace
         manager.setWorldspace("worldspace");
         const btBoxShape boxShape(btVector3(20, 20, 100));
         const CollisionShape shape(nullptr, boxShape, mObjectTransform);
-        ASSERT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground));
+        ASSERT_TRUE(manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {}));
         manager.setWorldspace("other");
         for (int x = -1; x < 1; ++x)
             for (int y = -1; y < 1; ++y)
                 ASSERT_EQ(manager.getMesh("other", TilePosition(x, y)), nullptr);
     }
+
+    TEST_F(DetourNavigatorTileCachedRecastMeshManagerTest, set_bounds_should_return_changed_tiles)
+    {
+        TileCachedRecastMeshManager manager(mSettings);
+        const btBoxShape boxShape(btVector3(20, 20, 100));
+        const CollisionShape shape(mInstance, boxShape, mObjectTransform);
+        TileBounds bounds;
+        bounds.mMin = osg::Vec2f(182, 0);
+        bounds.mMax = osg::Vec2f(1000, 1000);
+        manager.setBounds(bounds);
+        manager.addObject(ObjectId(&boxShape), shape, btTransform::getIdentity(), AreaType::AreaType_ground, [] (auto) {});
+        bounds.mMin = osg::Vec2f(-1000, -1000);
+        bounds.mMax = osg::Vec2f(0, -182);
+        EXPECT_THAT(manager.setBounds(bounds), ElementsAre(
+            std::pair(TilePosition(-1, -1), ChangeType::add),
+            std::pair(TilePosition(0, 0), ChangeType::remove)
+        ));
+    }
 }
diff --git a/components/detournavigator/asyncnavmeshupdater.hpp b/components/detournavigator/asyncnavmeshupdater.hpp
index 31778f8c26..fa8cba03af 100644
--- a/components/detournavigator/asyncnavmeshupdater.hpp
+++ b/components/detournavigator/asyncnavmeshupdater.hpp
@@ -8,6 +8,7 @@
 #include "navmeshtilescache.hpp"
 #include "waitconditiontype.hpp"
 #include "navmeshdb.hpp"
+#include "changetype.hpp"
 
 #include <osg/Vec3f>
 
@@ -32,29 +33,6 @@ namespace Loading
 
 namespace DetourNavigator
 {
-    enum class ChangeType
-    {
-        remove = 0,
-        mixed = 1,
-        add = 2,
-        update = 3,
-    };
-
-    inline std::ostream& operator <<(std::ostream& stream, ChangeType value)
-    {
-        switch (value) {
-            case ChangeType::remove:
-                return stream << "ChangeType::remove";
-            case ChangeType::mixed:
-                return stream << "ChangeType::mixed";
-            case ChangeType::add:
-                return stream << "ChangeType::add";
-            case ChangeType::update:
-                return stream << "ChangeType::update";
-        }
-        return stream << "ChangeType::" << static_cast<int>(value);
-    }
-
     enum class JobState
     {
         Initial,
diff --git a/components/detournavigator/changetype.hpp b/components/detournavigator/changetype.hpp
new file mode 100644
index 0000000000..1ede6aec13
--- /dev/null
+++ b/components/detournavigator/changetype.hpp
@@ -0,0 +1,33 @@
+#ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_CHANGETYPE_H
+#define OPENMW_COMPONENTS_DETOURNAVIGATOR_CHANGETYPE_H
+
+#include <ostream>
+
+namespace DetourNavigator
+{
+    enum class ChangeType
+    {
+        remove = 0,
+        mixed = 1,
+        add = 2,
+        update = 3,
+    };
+
+    inline std::ostream& operator <<(std::ostream& stream, ChangeType value)
+    {
+        switch (value)
+        {
+            case ChangeType::remove:
+                return stream << "ChangeType::remove";
+            case ChangeType::mixed:
+                return stream << "ChangeType::mixed";
+            case ChangeType::add:
+                return stream << "ChangeType::add";
+            case ChangeType::update:
+                return stream << "ChangeType::update";
+        }
+        return stream << "ChangeType::" << static_cast<int>(value);
+    }
+}
+
+#endif
diff --git a/components/detournavigator/gettilespositions.cpp b/components/detournavigator/gettilespositions.cpp
index 7a179aff24..2d42ec25bb 100644
--- a/components/detournavigator/gettilespositions.cpp
+++ b/components/detournavigator/gettilespositions.cpp
@@ -39,6 +39,14 @@ namespace DetourNavigator
         return makeTilesPositionsRange(bounds.mMin, bounds.mMax, settings);
     }
 
+    TilesPositionsRange makeTilesPositionsRange(const btCollisionShape& shape, const btTransform& transform,
+        const TileBounds& bounds, const RecastSettings& settings)
+    {
+        if (const auto intersection = getIntersection(bounds, makeObjectTileBounds(shape, transform)))
+            return makeTilesPositionsRange(intersection->mMin, intersection->mMax, settings);
+        return {};
+    }
+
     TilesPositionsRange makeTilesPositionsRange(const int cellSize, const btVector3& shift,
         const RecastSettings& settings)
     {
@@ -55,4 +63,17 @@ namespace DetourNavigator
 
         return makeTilesPositionsRange(Misc::Convert::toOsgXY(aabbMin), Misc::Convert::toOsgXY(aabbMax), settings);
     }
+
+    TilesPositionsRange getIntersection(const TilesPositionsRange& a, const TilesPositionsRange& b) noexcept
+    {
+        const int beginX = std::max(a.mBegin.x(), b.mBegin.x());
+        const int endX = std::min(a.mEnd.x(), b.mEnd.x());
+        if (beginX > endX)
+            return {};
+        const int beginY = std::max(a.mBegin.y(), b.mBegin.y());
+        const int endY = std::min(a.mEnd.y(), b.mEnd.y());
+        if (beginY > endY)
+            return {};
+        return TilesPositionsRange {TilePosition(beginX, beginY), TilePosition(endX, endY)};
+    }
 }
diff --git a/components/detournavigator/gettilespositions.hpp b/components/detournavigator/gettilespositions.hpp
index db88708314..79188868dc 100644
--- a/components/detournavigator/gettilespositions.hpp
+++ b/components/detournavigator/gettilespositions.hpp
@@ -1,6 +1,7 @@
 #ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_GETTILESPOSITIONS_H
 #define OPENMW_COMPONENTS_DETOURNAVIGATOR_GETTILESPOSITIONS_H
 
+#include "tilebounds.hpp"
 #include "tileposition.hpp"
 
 class btVector3;
@@ -28,6 +29,9 @@ namespace DetourNavigator
     TilesPositionsRange makeTilesPositionsRange(const btCollisionShape& shape,
         const btTransform& transform, const RecastSettings& settings);
 
+    TilesPositionsRange makeTilesPositionsRange(const btCollisionShape& shape,
+        const btTransform& transform, const TileBounds& bounds, const RecastSettings& settings);
+
     TilesPositionsRange makeTilesPositionsRange(const int cellSize, const btVector3& shift,
         const RecastSettings& settings);
 
@@ -38,6 +42,19 @@ namespace DetourNavigator
             for (int tileY = range.mBegin.y(); tileY < range.mEnd.y(); ++tileY)
                 callback(TilePosition {tileX, tileY});
     }
+
+    inline bool isInTilesPositionsRange(int begin, int end, int coordinate)
+    {
+        return begin <= coordinate && coordinate < end;
+    }
+
+    inline bool isInTilesPositionsRange(const TilesPositionsRange& range, const TilePosition& position)
+    {
+        return isInTilesPositionsRange(range.mBegin.x(), range.mEnd.x(), position.x())
+            && isInTilesPositionsRange(range.mBegin.y(), range.mEnd.y(), position.y());
+    }
+
+    TilesPositionsRange getIntersection(const TilesPositionsRange& a, const TilesPositionsRange& b) noexcept;
 }
 
 #endif
diff --git a/components/detournavigator/navigator.hpp b/components/detournavigator/navigator.hpp
index 14731fcc5b..65f7c43fc1 100644
--- a/components/detournavigator/navigator.hpp
+++ b/components/detournavigator/navigator.hpp
@@ -83,6 +83,12 @@ namespace DetourNavigator
          */
         virtual void setWorldspace(std::string_view worldspace) = 0;
 
+        /**
+         * @brief updateBounds should be called before adding object from loading cell
+         * @param playerPosition corresponds to the bounds center
+         */
+        virtual void updateBounds(const osg::Vec3f& playerPosition) = 0;
+
         /**
          * @brief addObject is used to add complex object with allowed to walk and avoided to walk shapes
          * @param id is used to distinguish different objects
diff --git a/components/detournavigator/navigatorimpl.cpp b/components/detournavigator/navigatorimpl.cpp
index 4f6ec79328..42cd8bd9d1 100644
--- a/components/detournavigator/navigatorimpl.cpp
+++ b/components/detournavigator/navigatorimpl.cpp
@@ -38,6 +38,11 @@ namespace DetourNavigator
         mNavMeshManager.setWorldspace(worldspace);
     }
 
+    void NavigatorImpl::updateBounds(const osg::Vec3f& playerPosition)
+    {
+        mNavMeshManager.updateBounds(playerPosition);
+    }
+
     bool NavigatorImpl::addObject(const ObjectId id, const ObjectShapes& shapes, const btTransform& transform)
     {
         const CollisionShape collisionShape(shapes.mShapeInstance, *shapes.mShapeInstance->mCollisionShape, shapes.mTransform);
@@ -158,6 +163,7 @@ namespace DetourNavigator
         const TilePosition tilePosition = getTilePosition(mSettings.mRecast, toNavMeshCoordinates(mSettings.mRecast, playerPosition));
         if (mLastPlayerPosition.has_value() && *mLastPlayerPosition == tilePosition)
             return;
+        mNavMeshManager.updateBounds(playerPosition);
         update(playerPosition);
         mLastPlayerPosition = tilePosition;
     }
diff --git a/components/detournavigator/navigatorimpl.hpp b/components/detournavigator/navigatorimpl.hpp
index 116817395c..58c4c6c05d 100644
--- a/components/detournavigator/navigatorimpl.hpp
+++ b/components/detournavigator/navigatorimpl.hpp
@@ -24,6 +24,8 @@ namespace DetourNavigator
 
         void setWorldspace(std::string_view worldspace) override;
 
+        void updateBounds(const osg::Vec3f& playerPosition) override;
+
         bool addObject(const ObjectId id, const ObjectShapes& shapes, const btTransform& transform) override;
 
         bool addObject(const ObjectId id, const DoorShapes& shapes, const btTransform& transform) override;
diff --git a/components/detournavigator/navigatorstub.hpp b/components/detournavigator/navigatorstub.hpp
index 6a320c1a08..466ff5c912 100644
--- a/components/detournavigator/navigatorstub.hpp
+++ b/components/detournavigator/navigatorstub.hpp
@@ -72,6 +72,8 @@ namespace DetourNavigator
 
         void update(const osg::Vec3f& /*playerPosition*/) override {}
 
+        void updateBounds(const osg::Vec3f& /*playerPosition*/) override {}
+
         void updatePlayerPosition(const osg::Vec3f& /*playerPosition*/) override {};
 
         void setUpdatesEnabled(bool /*enabled*/) override {}
diff --git a/components/detournavigator/navmeshmanager.cpp b/components/detournavigator/navmeshmanager.cpp
index 9fba4ad611..bbaf010807 100644
--- a/components/detournavigator/navmeshmanager.cpp
+++ b/components/detournavigator/navmeshmanager.cpp
@@ -42,6 +42,18 @@ namespace
 
 namespace DetourNavigator
 {
+    namespace
+    {
+        TileBounds makeBounds(const RecastSettings& settings, const osg::Vec2f& center, int maxTiles)
+        {
+            const float radius = fromNavMeshCoordinates(settings, std::ceil(std::sqrt(static_cast<float>(maxTiles) / osg::PIf) + 1) * getTileSize(settings));
+            TileBounds result;
+            result.mMin = center - osg::Vec2f(radius, radius);
+            result.mMax = center + osg::Vec2f(radius, radius);
+            return result;
+        }
+    }
+
     NavMeshManager::NavMeshManager(const Settings& settings, std::unique_ptr<NavMeshDb>&& db)
         : mSettings(settings)
         , mRecastMeshManager(settings.mRecast)
@@ -59,21 +71,37 @@ namespace DetourNavigator
         mWorldspace = worldspace;
     }
 
+    void NavMeshManager::updateBounds(const osg::Vec3f& playerPosition)
+    {
+        const TileBounds bounds = makeBounds(mSettings.mRecast, osg::Vec2f(playerPosition.x(), playerPosition.y()),
+                                             mSettings.mMaxTilesNumber);
+        const auto changedTiles = mRecastMeshManager.setBounds(bounds);
+        for (const auto& [agent, cache] : mCache)
+        {
+            auto& tiles = mChangedTiles[agent];
+            for (const auto& [tilePosition, changeType] : changedTiles)
+            {
+                auto tile = tiles.find(tilePosition);
+                if (tile == tiles.end())
+                    tiles.emplace_hint(tile, tilePosition, changeType);
+                else
+                    tile->second = addChangeType(tile->second, changeType);
+            }
+        }
+    }
+
     bool NavMeshManager::addObject(const ObjectId id, const CollisionShape& shape, const btTransform& transform,
                                    const AreaType areaType)
     {
-        const btCollisionShape& collisionShape = shape.getShape();
-        if (!mRecastMeshManager.addObject(id, shape, transform, areaType))
-            return false;
-        addChangedTiles(collisionShape, transform, ChangeType::add);
-        return true;
+        return mRecastMeshManager.addObject(id, shape, transform, areaType,
+            [&] (const TilePosition& tile) { addChangedTile(tile, ChangeType::add); });
     }
 
     bool NavMeshManager::updateObject(const ObjectId id, const CollisionShape& shape, const btTransform& transform,
                                       const AreaType areaType)
     {
         return mRecastMeshManager.updateObject(id, shape, transform, areaType,
-            [&] (const TilePosition& tile) { addChangedTile(tile, ChangeType::update); });
+            [&] (const TilePosition& tile, ChangeType changeType) { addChangedTile(tile, changeType); });
     }
 
     bool NavMeshManager::removeObject(const ObjectId id)
@@ -263,7 +291,8 @@ namespace DetourNavigator
     void NavMeshManager::addChangedTiles(const btCollisionShape& shape, const btTransform& transform,
             const ChangeType changeType)
     {
-        getTilesPositions(makeTilesPositionsRange(shape, transform, mSettings.mRecast),
+        const auto bounds = mRecastMeshManager.getBounds();
+        getTilesPositions(makeTilesPositionsRange(shape, transform, bounds, mSettings.mRecast),
             [&] (const TilePosition& v) { addChangedTile(v, changeType); });
     }
 
diff --git a/components/detournavigator/navmeshmanager.hpp b/components/detournavigator/navmeshmanager.hpp
index 3fd2d28d74..01937d22bd 100644
--- a/components/detournavigator/navmeshmanager.hpp
+++ b/components/detournavigator/navmeshmanager.hpp
@@ -26,6 +26,8 @@ namespace DetourNavigator
 
         void setWorldspace(std::string_view worldspace);
 
+        void updateBounds(const osg::Vec3f& playerPosition);
+
         bool addObject(const ObjectId id, const CollisionShape& shape, const btTransform& transform,
                        const AreaType areaType);
 
diff --git a/components/detournavigator/settingsutils.hpp b/components/detournavigator/settingsutils.hpp
index a4c68e3cd5..c1e611aaf8 100644
--- a/components/detournavigator/settingsutils.hpp
+++ b/components/detournavigator/settingsutils.hpp
@@ -37,6 +37,11 @@ namespace DetourNavigator
         };
     }
 
+    inline float fromNavMeshCoordinates(const RecastSettings& settings, float value)
+    {
+        return value / settings.mRecastScaleFactor;
+    }
+
     inline osg::Vec3f fromNavMeshCoordinates(const RecastSettings& settings, osg::Vec3f position)
     {
         const auto factor = 1.0f / settings.mRecastScaleFactor;
diff --git a/components/detournavigator/tilebounds.hpp b/components/detournavigator/tilebounds.hpp
index 79f6370ff2..2dc32292e8 100644
--- a/components/detournavigator/tilebounds.hpp
+++ b/components/detournavigator/tilebounds.hpp
@@ -21,9 +21,24 @@ namespace DetourNavigator
         osg::Vec2f mMax;
     };
 
+    inline auto tie(const TileBounds& value) noexcept
+    {
+        return std::tie(value.mMin, value.mMax);
+    }
+
     inline bool operator<(const TileBounds& lhs, const TileBounds& rhs) noexcept
     {
-        return std::tie(lhs.mMin, lhs.mMax) < std::tie(rhs.mMin, rhs.mMax);
+        return tie(lhs) < tie(rhs);
+    }
+
+    inline bool operator ==(const TileBounds& lhs, const TileBounds& rhs) noexcept
+    {
+        return tie(lhs) == tie(rhs);
+    }
+
+    inline bool operator !=(const TileBounds& lhs, const TileBounds& rhs) noexcept
+    {
+        return !(lhs == rhs);
     }
 
     inline std::optional<TileBounds> getIntersection(const TileBounds& a, const TileBounds& b) noexcept
diff --git a/components/detournavigator/tilecachedrecastmeshmanager.cpp b/components/detournavigator/tilecachedrecastmeshmanager.cpp
index 314e7641e3..c7bd3bc867 100644
--- a/components/detournavigator/tilecachedrecastmeshmanager.cpp
+++ b/components/detournavigator/tilecachedrecastmeshmanager.cpp
@@ -2,19 +2,93 @@
 #include "makenavmesh.hpp"
 #include "gettilespositions.hpp"
 #include "settingsutils.hpp"
+#include "changetype.hpp"
 
 #include <components/debug/debuglog.hpp>
 #include <components/misc/convert.hpp>
 
 #include <algorithm>
 #include <vector>
+#include <limits>
 
 namespace DetourNavigator
 {
+    namespace
+    {
+        const TileBounds infiniteTileBounds {
+            osg::Vec2f(-std::numeric_limits<float>::max(), -std::numeric_limits<float>::max()),
+            osg::Vec2f(std::numeric_limits<float>::max(), std::numeric_limits<float>::max())
+        };
+    }
+
     TileCachedRecastMeshManager::TileCachedRecastMeshManager(const RecastSettings& settings)
         : mSettings(settings)
+        , mBounds(infiniteTileBounds)
+        , mRange(makeTilesPositionsRange(mBounds.mMin, mBounds.mMax, mSettings))
     {}
 
+    TileBounds TileCachedRecastMeshManager::getBounds() const
+    {
+        return mBounds;
+    }
+
+    std::vector<std::pair<TilePosition, ChangeType>> TileCachedRecastMeshManager::setBounds(const TileBounds& bounds)
+    {
+        std::vector<std::pair<TilePosition, ChangeType>> changedTiles;
+
+        if (mBounds == bounds)
+            return changedTiles;
+
+        const auto newRange = makeTilesPositionsRange(bounds.mMin, bounds.mMax, mSettings);
+
+        if (mBounds != infiniteTileBounds)
+        {
+            const std::lock_guard lock(mMutex);
+            for (auto& object : mObjects)
+            {
+                const ObjectId id = object.first;
+                ObjectData& data = object.second;
+                const TilesPositionsRange objectRange = makeTilesPositionsRange(data.mShape.getShape(), data.mTransform, mSettings);
+
+                const auto onOldTilePosition = [&] (const TilePosition& position)
+                {
+                    if (isInTilesPositionsRange(newRange, position))
+                        return;
+                    const auto it = data.mTiles.find(position);
+                    if (it == data.mTiles.end())
+                        return;
+                    data.mTiles.erase(it);
+                    if (removeTile(id, position, mTiles))
+                        changedTiles.emplace_back(position, ChangeType::remove);
+                };
+                getTilesPositions(getIntersection(mRange, objectRange), onOldTilePosition);
+
+                const auto onNewTilePosition = [&] (const TilePosition& position)
+                {
+                    if (data.mTiles.find(position) != data.mTiles.end())
+                        return;
+                    if (addTile(id, data.mShape, data.mTransform, data.mAreaType, position, mTiles))
+                    {
+                        data.mTiles.insert(position);
+                        changedTiles.emplace_back(position, ChangeType::add);
+                    }
+                };
+                getTilesPositions(getIntersection(newRange, objectRange), onNewTilePosition);
+            }
+
+            std::sort(changedTiles.begin(), changedTiles.end());
+            changedTiles.erase(std::unique(changedTiles.begin(), changedTiles.end()), changedTiles.end());
+        }
+
+        if (!changedTiles.empty())
+            ++mRevision;
+
+        mBounds = bounds;
+        mRange = newRange;
+
+        return changedTiles;
+    }
+
     std::string TileCachedRecastMeshManager::getWorldspace() const
     {
         const std::lock_guard lock(mMutex);
@@ -30,47 +104,22 @@ namespace DetourNavigator
         mWorldspace = worldspace;
     }
 
-    bool TileCachedRecastMeshManager::addObject(const ObjectId id, const CollisionShape& shape,
-                                                const btTransform& transform, const AreaType areaType)
-    {
-        const auto it = mObjectsTilesPositions.find(id);
-        if (it != mObjectsTilesPositions.end())
-            return false;
-        std::vector<TilePosition> tilesPositions;
-        {
-            const TilesPositionsRange range = makeTilesPositionsRange(shape.getShape(), transform, mSettings);
-            const std::lock_guard lock(mMutex);
-            getTilesPositions(range,
-                [&] (const TilePosition& tilePosition)
-                {
-                    if (addTile(id, shape, transform, areaType, tilePosition, mTiles))
-                        tilesPositions.push_back(tilePosition);
-                });
-        }
-        if (tilesPositions.empty())
-            return false;
-        std::sort(tilesPositions.begin(), tilesPositions.end());
-        mObjectsTilesPositions.emplace_hint(it, id, std::move(tilesPositions));
-        ++mRevision;
-        return true;
-    }
-
     std::optional<RemovedRecastMeshObject> TileCachedRecastMeshManager::removeObject(const ObjectId id)
     {
-        const auto object = mObjectsTilesPositions.find(id);
-        if (object == mObjectsTilesPositions.end())
+        const auto object = mObjects.find(id);
+        if (object == mObjects.end())
             return std::nullopt;
         std::optional<RemovedRecastMeshObject> result;
         {
             const std::lock_guard lock(mMutex);
-            for (const auto& tilePosition : object->second)
+            for (const auto& tilePosition : object->second.mTiles)
             {
                 const auto removed = removeTile(id, tilePosition, mTiles);
                 if (removed && !result)
                     result = removed;
             }
         }
-        mObjectsTilesPositions.erase(object);
+        mObjects.erase(object);
         if (result)
             ++mRevision;
         return result;
diff --git a/components/detournavigator/tilecachedrecastmeshmanager.hpp b/components/detournavigator/tilecachedrecastmeshmanager.hpp
index efd70477d3..906355524e 100644
--- a/components/detournavigator/tilecachedrecastmeshmanager.hpp
+++ b/components/detournavigator/tilecachedrecastmeshmanager.hpp
@@ -7,11 +7,13 @@
 #include "gettilespositions.hpp"
 #include "version.hpp"
 #include "heightfieldshape.hpp"
+#include "changetype.hpp"
 
 #include <algorithm>
 #include <map>
 #include <mutex>
 #include <vector>
+#include <set>
 
 namespace DetourNavigator
 {
@@ -20,58 +22,85 @@ namespace DetourNavigator
     public:
         explicit TileCachedRecastMeshManager(const RecastSettings& settings);
 
+        TileBounds getBounds() const;
+
+        std::vector<std::pair<TilePosition, ChangeType>> setBounds(const TileBounds& bounds);
+
         std::string getWorldspace() const;
 
         void setWorldspace(std::string_view worldspace);
 
+        template <class OnChangedTile>
         bool addObject(const ObjectId id, const CollisionShape& shape, const btTransform& transform,
-                       const AreaType areaType);
+            const AreaType areaType, OnChangedTile&& onChangedTile)
+        {
+            auto it = mObjects.find(id);
+            if (it != mObjects.end())
+                return false;
+            const TilesPositionsRange objectRange = makeTilesPositionsRange(shape.getShape(), transform, mSettings);
+            const TilesPositionsRange range = getIntersection(mRange, objectRange);
+            std::set<TilePosition> tilesPositions;
+            if (range.mBegin != range.mEnd)
+            {
+                const std::lock_guard lock(mMutex);
+                getTilesPositions(range,
+                    [&] (const TilePosition& tilePosition)
+                    {
+                        if (addTile(id, shape, transform, areaType, tilePosition, mTiles))
+                            tilesPositions.insert(tilePosition);
+                    });
+            }
+            it = mObjects.emplace_hint(it, id, ObjectData {shape, transform, areaType, std::move(tilesPositions)});
+            std::for_each(it->second.mTiles.begin(), it->second.mTiles.end(), std::forward<OnChangedTile>(onChangedTile));
+            ++mRevision;
+            return true;
+        }
 
         template <class OnChangedTile>
         bool updateObject(const ObjectId id, const CollisionShape& shape, const btTransform& transform,
             const AreaType areaType, OnChangedTile&& onChangedTile)
         {
-            const auto object = mObjectsTilesPositions.find(id);
-            if (object == mObjectsTilesPositions.end())
+            const auto object = mObjects.find(id);
+            if (object == mObjects.end())
                 return false;
-            auto& currentTiles = object->second;
+            auto& data = object->second;
             bool changed = false;
-            std::vector<TilePosition> newTiles;
+            std::set<TilePosition> newTiles;
             {
                 const auto onTilePosition = [&] (const TilePosition& tilePosition)
                 {
-                    if (std::binary_search(currentTiles.begin(), currentTiles.end(), tilePosition))
+                    if (data.mTiles.find(tilePosition) != data.mTiles.end())
                     {
-                        newTiles.push_back(tilePosition);
+                        newTiles.insert(tilePosition);
                         if (updateTile(id, transform, areaType, tilePosition, mTiles))
                         {
-                            onChangedTile(tilePosition);
+                            onChangedTile(tilePosition, ChangeType::update);
                             changed = true;
                         }
                     }
                     else if (addTile(id, shape, transform, areaType, tilePosition, mTiles))
                     {
-                        newTiles.push_back(tilePosition);
-                        onChangedTile(tilePosition);
+                        newTiles.insert(tilePosition);
+                        onChangedTile(tilePosition, ChangeType::add);
                         changed = true;
                     }
                 };
-                const TilesPositionsRange range = makeTilesPositionsRange(shape.getShape(), transform, mSettings);
+                const TilesPositionsRange objectRange = makeTilesPositionsRange(shape.getShape(), transform, mSettings);
+                const TilesPositionsRange range = getIntersection(mRange, objectRange);
                 const std::lock_guard lock(mMutex);
                 getTilesPositions(range, onTilePosition);
-                std::sort(newTiles.begin(), newTiles.end());
-                for (const auto& tile : currentTiles)
+                for (const auto& tile : data.mTiles)
                 {
-                    if (!std::binary_search(newTiles.begin(), newTiles.end(), tile) && removeTile(id, tile, mTiles))
+                    if (newTiles.find(tile) == newTiles.end() && removeTile(id, tile, mTiles))
                     {
-                        onChangedTile(tile);
+                        onChangedTile(tile, ChangeType::remove);
                         changed = true;
                     }
                 }
             }
             if (changed)
             {
-                currentTiles = std::move(newTiles);
+                data.mTiles = std::move(newTiles);
                 ++mRevision;
             }
             return changed;
@@ -108,11 +137,21 @@ namespace DetourNavigator
     private:
         using TilesMap = std::map<TilePosition, std::shared_ptr<CachedRecastMeshManager>>;
 
+        struct ObjectData
+        {
+            const CollisionShape mShape;
+            const btTransform mTransform;
+            const AreaType mAreaType;
+            std::set<TilePosition> mTiles;
+        };
+
         const RecastSettings& mSettings;
         mutable std::mutex mMutex;
+        TileBounds mBounds;
+        TilesPositionsRange mRange;
         std::string mWorldspace;
         TilesMap mTiles;
-        std::unordered_map<ObjectId, std::vector<TilePosition>> mObjectsTilesPositions;
+        std::unordered_map<ObjectId, ObjectData> mObjects;
         std::map<osg::Vec2i, std::vector<TilePosition>> mWaterTilesPositions;
         std::map<osg::Vec2i, std::vector<TilePosition>> mHeightfieldTilesPositions;
         std::size_t mRevision = 0;