diff --git a/CHANGELOG.md b/CHANGELOG.md
index f407a156e..4c7930f03 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,7 @@
     Bug #4429: [Windows] Error on build INSTALL.vcxproj project (debug) with cmake 3.7.2
     Bug #4432: Guards behaviour is incorrect if they do not have AI packages
     Bug #4433: Guard behaviour is incorrect with Alarm = 0
+    Feature #4256: Implement ToggleBorders (TB) console command
     Feature #4345: Add equivalents for the command line commands to Launcher
     Feature #4444: Per-group KF-animation files support
 
diff --git a/components/terrain/cellborder.cpp b/components/terrain/cellborder.cpp
index b74e2e9be..d9e6d52fc 100644
--- a/components/terrain/cellborder.cpp
+++ b/components/terrain/cellborder.cpp
@@ -5,20 +5,21 @@
 #include <osg/Geode>
 
 #include "world.hpp"
+#include "../esm/loadland.hpp"
 
 namespace MWRender
 {
 
-CellBorder::CellBorder(Terrain::World *world, osg::Group *root):
+CellBorder::CellBorder(Terrain::World *world, osg::Group *root, int borderMask):
     mWorld(world),
     mRoot(root),
-    mBorderRoot(0)
+    mBorderMask(borderMask)
 {
 }
 
 void CellBorder::createCellBorderGeometry(int x, int y)
 {
-    const int cellSize = 8192;
+    const int cellSize = ESM::Land::REAL_SIZE;
     const int borderSegments = 40;
     const float offset = 10.0;
 
@@ -68,9 +69,9 @@ void CellBorder::createCellBorderGeometry(int x, int y)
     polygonmode->setMode(osg::PolygonMode::FRONT_AND_BACK, osg::PolygonMode::LINE);
     stateSet->setAttributeAndModes(polygonmode,osg::StateAttribute::ON);
 
-    mRoot->addChild(borderGeode);
+    borderGeode->setNodeMask(mBorderMask);
 
-    mBorderRoot = borderGeode;
+    mRoot->addChild(borderGeode);
 
     mCellBorderNodes[std::make_pair(x,y)] = borderGeode;
 }
@@ -83,9 +84,15 @@ void CellBorder::destroyCellBorderGeometry(int x, int y)
         return;
 
     osg::ref_ptr<osg::Node> borderNode = it->second;
-    mBorderRoot->removeChild(borderNode);
+    mRoot->removeChild(borderNode);
 
     mCellBorderNodes.erase(it);
 }
 
+void CellBorder::destroyCellBorderGeometry()
+{
+    for (CellGrid::iterator it = mCellBorderNodes.begin(); it != mCellBorderNodes.end(); ++it)
+        destroyCellBorderGeometry(it->first.first,it->first.second);
+}
+
 }
diff --git a/components/terrain/cellborder.hpp b/components/terrain/cellborder.hpp
index 6144f8c32..0cbe7b899 100644
--- a/components/terrain/cellborder.hpp
+++ b/components/terrain/cellborder.hpp
@@ -19,17 +19,22 @@ namespace MWRender
     public:
         typedef std::map<std::pair<int, int>, osg::ref_ptr<osg::Node> > CellGrid; 
 
-        CellBorder(Terrain::World *world, osg::Group *root);
+        CellBorder(Terrain::World *world, osg::Group *root, int borderMask);
 
         void createCellBorderGeometry(int x, int y);
         void destroyCellBorderGeometry(int x, int y);
 
+        /**
+          Destroys the geometry for all borders.
+        */
+        void destroyCellBorderGeometry();
+
     protected:
         Terrain::World *mWorld;
         osg::Group *mRoot;
-        osg::Group *mBorderRoot;
 
         CellGrid mCellBorderNodes;
+        int mBorderMask;
     };
 }
 
diff --git a/components/terrain/terraingrid.cpp b/components/terrain/terraingrid.cpp
index f5ab6f64b..74f683774 100644
--- a/components/terrain/terraingrid.cpp
+++ b/components/terrain/terraingrid.cpp
@@ -75,7 +75,7 @@ void TerrainGrid::loadCell(int x, int y)
     if (!terrainNode)
         return; // no terrain defined
 
-    Terrain::World::loadCell(x,y);
+    TerrainGrid::World::loadCell(x,y);
 
     mTerrainRoot->addChild(terrainNode);
 
@@ -84,12 +84,12 @@ void TerrainGrid::loadCell(int x, int y)
 
 void TerrainGrid::unloadCell(int x, int y)
 {
-    World::unloadCell(x,y);
-
     MWRender::CellBorder::CellGrid::iterator it = mGrid.find(std::make_pair(x,y));
     if (it == mGrid.end())
         return;
 
+    Terrain::World::unloadCell(x,y);
+
     osg::ref_ptr<osg::Node> terrainNode = it->second;
     mTerrainRoot->removeChild(terrainNode);
 
diff --git a/components/terrain/terraingrid.hpp b/components/terrain/terraingrid.hpp
index f21dd39d3..87e3b432c 100644
--- a/components/terrain/terraingrid.hpp
+++ b/components/terrain/terraingrid.hpp
@@ -7,8 +7,6 @@
 
 #include "world.hpp"
 
-#include "cellborder.hpp"
-
 namespace Terrain
 {
 
@@ -37,7 +35,6 @@ namespace Terrain
 
         MWRender::CellBorder::CellGrid mGrid;
     };
-
 }
 
 #endif
diff --git a/components/terrain/world.cpp b/components/terrain/world.cpp
index d871d141b..cc81dbef8 100644
--- a/components/terrain/world.cpp
+++ b/components/terrain/world.cpp
@@ -18,6 +18,7 @@ World::World(osg::Group* parent, osg::Group* compileRoot, Resource::ResourceSyst
     : mStorage(storage)
     , mParent(parent)
     , mResourceSystem(resourceSystem)
+    , mBorderVisible(false)
 {
     mTerrainRoot = new osg::Group;
     mTerrainRoot->setNodeMask(nodeMask);
@@ -28,12 +29,6 @@ World::World(osg::Group* parent, osg::Group* compileRoot, Resource::ResourceSyst
 
     mTerrainRoot->setName("Terrain Root");
 
-    mBorderRoot = new osg::Switch;
-    mBorderRoot->setName("Border Root");
-    mBorderRoot->setNodeMask(borderMask);
-
-    mTerrainRoot->addChild(mBorderRoot);
-
     osg::ref_ptr<osg::Camera> compositeCam = new osg::Camera;
     compositeCam->setRenderOrder(osg::Camera::PRE_RENDER, -1);
     compositeCam->setProjectionMatrix(osg::Matrix::identity());
@@ -52,44 +47,52 @@ World::World(osg::Group* parent, osg::Group* compileRoot, Resource::ResourceSyst
 
     mTextureManager.reset(new TextureManager(mResourceSystem->getSceneManager()));
     mChunkManager.reset(new ChunkManager(mStorage, mResourceSystem->getSceneManager(), mTextureManager.get(), mCompositeMapRenderer));
-
-    mCellBorder.reset(new MWRender::CellBorder(this,mTerrainRoot.get()));
+    mCellBorder.reset(new MWRender::CellBorder(this,mTerrainRoot.get(),borderMask));
 
     mResourceSystem->addResourceManager(mChunkManager.get());
     mResourceSystem->addResourceManager(mTextureManager.get());
+}
 
-    setBordersVisible(false);
+World::~World()
+{
+    mResourceSystem->removeResourceManager(mChunkManager.get());
+    mResourceSystem->removeResourceManager(mTextureManager.get());
+
+    mParent->removeChild(mTerrainRoot);
+
+    mCompositeMapCamera->removeChild(mCompositeMapRenderer);
+    mCompositeMapCamera->getParent(0)->removeChild(mCompositeMapCamera);
+
+    delete mStorage;
 }
 
 void World::setBordersVisible(bool visible)
 {
+    mBorderVisible = visible;
+
     if (visible)
-        mBorderRoot->setAllChildrenOn();
+    {
+        for (std::set<std::pair<int,int>>::iterator it = mLoadedCells.begin(); it != mLoadedCells.end(); ++it)
+            mCellBorder->createCellBorderGeometry(it->first,it->second);
+    }
     else
-        mBorderRoot->setAllChildrenOff();
+        mCellBorder->destroyCellBorderGeometry();
 }
 
 void World::loadCell(int x, int y)
 {
-    mCellBorder->createCellBorderGeometry(x,y);
-}
+    if (mBorderVisible)
+        mCellBorder->createCellBorderGeometry(x,y);
 
-void World::unloadCell(int x, int y)
-{
-    mCellBorder->destroyCellBorderGeometry(x,y);
+    mLoadedCells.insert(std::pair<int,int>(x,y));
 }
 
-World::~World()
+void World::unloadCell(int x, int y)
 {
-    mResourceSystem->removeResourceManager(mChunkManager.get());
-    mResourceSystem->removeResourceManager(mTextureManager.get());
-
-    mParent->removeChild(mTerrainRoot);
+    if (mBorderVisible)
+        mCellBorder->destroyCellBorderGeometry(x,y);
 
-    mCompositeMapCamera->removeChild(mCompositeMapRenderer);
-    mCompositeMapCamera->getParent(0)->removeChild(mCompositeMapCamera);
-
-    delete mStorage;
+    mLoadedCells.erase(std::pair<int,int>(x,y));
 }
 
 void World::setTargetFrameRate(float rate)
diff --git a/components/terrain/world.hpp b/components/terrain/world.hpp
index b847d08ab..ae71693bd 100644
--- a/components/terrain/world.hpp
+++ b/components/terrain/world.hpp
@@ -4,12 +4,11 @@
 #include <osg/ref_ptr>
 #include <osg/Referenced>
 #include <osg/Vec3f>
-#include <osg/Switch>
 
 #include <memory>
+#include <set>
 
 #include "defs.hpp"
-
 #include "cellborder.hpp"
 
 namespace osg
@@ -87,7 +86,7 @@ namespace Terrain
 
         virtual void enable(bool enabled) {}
 
-        void setBordersVisible(bool visible);
+        virtual void setBordersVisible(bool visible);
 
         /// Create a View to use with preload feature. The caller is responsible for deleting the view.
         /// @note Thread safe.
@@ -104,14 +103,10 @@ namespace Terrain
         Storage* getStorage() { return mStorage; }
 
     protected:
-        void createCellBorderGeometry(int x, int y);
-        void destroyCellBorderGeometry(int x, int y);
-
         Storage* mStorage;
 
         osg::ref_ptr<osg::Group> mParent;
         osg::ref_ptr<osg::Group> mTerrainRoot;
-        osg::ref_ptr<osg::Switch> mBorderRoot;
 
         osg::ref_ptr<osg::Group> mCompositeMapCamera;
         osg::ref_ptr<CompositeMapRenderer> mCompositeMapRenderer;
@@ -122,6 +117,10 @@ namespace Terrain
         std::unique_ptr<ChunkManager> mChunkManager;
 
         std::unique_ptr<MWRender::CellBorder> mCellBorder;
+
+        bool mBorderVisible;
+
+        std::set<std::pair<int,int>> mLoadedCells;
     };
 }