diff --git a/include/osgTerrain/GeometryTechnique b/include/osgTerrain/GeometryTechnique
index 70cb90df0..5f9829759 100644
--- a/include/osgTerrain/GeometryTechnique
+++ b/include/osgTerrain/GeometryTechnique
@@ -76,6 +76,11 @@ class OSGTERRAIN_EXPORT GeometryTechnique : public TerrainTechnique
         
         void setFilterMatrixAs(FilterType filterType);
 
+        /** If State is non-zero, this function releases any associated OpenGL objects for
+        * the specified graphics context. Otherwise, releases OpenGL objects
+        * for all graphics contexts. */
+        virtual void releaseGLObjects(osg::State* = 0) const;
+
 
     private:
 
diff --git a/include/osgTerrain/TerrainTechnique b/include/osgTerrain/TerrainTechnique
index e7f47854e..1922cddbd 100644
--- a/include/osgTerrain/TerrainTechnique
+++ b/include/osgTerrain/TerrainTechnique
@@ -51,6 +51,11 @@ class OSGTERRAIN_EXPORT TerrainTechnique : public osg::Object
         /** Traverse the terrain subgraph.*/
         virtual void traverse(osg::NodeVisitor& nv);
 
+        /** If State is non-zero, this function releases any associated OpenGL objects for
+        * the specified graphics context. Otherwise, releases OpenGL objects
+        * for all graphics contexts. */
+        virtual void releaseGLObjects(osg::State* = 0) const {}
+
     protected:
     
         void setDirty(bool dirty);
diff --git a/include/osgTerrain/TerrainTile b/include/osgTerrain/TerrainTile
index 42b7ece3a..6e49527d0 100644
--- a/include/osgTerrain/TerrainTile
+++ b/include/osgTerrain/TerrainTile
@@ -175,6 +175,12 @@ class OSGTERRAIN_EXPORT TerrainTile : public osg::Group
         static void setTileLoadedCallback(TileLoadedCallback* lc);
         static osg::ref_ptr<TileLoadedCallback>& getTileLoadedCallback();
 
+        /** If State is non-zero, this function releases any associated OpenGL objects for
+        * the specified graphics context. Otherwise, releases OpenGL objects
+        * for all graphics contexts. */
+        virtual void releaseGLObjects(osg::State* = 0) const;
+
+
     protected:
 
         virtual ~TerrainTile();
diff --git a/src/osgTerrain/GeometryTechnique.cpp b/src/osgTerrain/GeometryTechnique.cpp
index 9f51e374e..602e5ce4c 100644
--- a/src/osgTerrain/GeometryTechnique.cpp
+++ b/src/osgTerrain/GeometryTechnique.cpp
@@ -898,3 +898,9 @@ void GeometryTechnique::cleanSceneGraph()
 {
 }
 
+void GeometryTechnique::releaseGLObjects(osg::State* state) const
+{
+    if (_bufferData[0]._transform.valid()) _bufferData[0]._transform->releaseGLObjects(state);
+    if (_bufferData[1]._transform.valid()) _bufferData[1]._transform->releaseGLObjects(state);    
+}
+
diff --git a/src/osgTerrain/TerrainTile.cpp b/src/osgTerrain/TerrainTile.cpp
index 55b213cbf..21b0c3675 100644
--- a/src/osgTerrain/TerrainTile.cpp
+++ b/src/osgTerrain/TerrainTile.cpp
@@ -463,3 +463,14 @@ void WhiteListTileLoadedCallback::loaded(osgTerrain::TerrainTile* tile, const os
 
     }
 }
+
+void TerrainTile::releaseGLObjects(osg::State* state) const
+{
+    Group::releaseGLObjects(state);
+
+    if (_terrainTechnique.valid())
+    {
+        _terrainTechnique->releaseGLObjects( state );
+    }
+}
+