diff --git a/examples/osgphotoalbum/PhotoArchive.cpp b/examples/osgphotoalbum/PhotoArchive.cpp
index a7f94b69e..59eac5d3e 100644
--- a/examples/osgphotoalbum/PhotoArchive.cpp
+++ b/examples/osgphotoalbum/PhotoArchive.cpp
@@ -215,11 +215,11 @@ void PhotoArchive::buildArchive(const std::string& filename, const FileNameList&
                 return;
             }
 
-            PixelStorageModes psm;
+            osg::PixelStorageModes psm;
             psm.pack_alignment = image->getPacking();
             psm.unpack_alignment = image->getPacking();
 
-            GLint status = gluScaleImage(&psm, image->getPixelFormat(),
+            GLint status = osg::gluScaleImage(&psm, image->getPixelFormat(),
                 image->s(),
                 image->t(),
                 image->getDataType(),
@@ -233,7 +233,7 @@ void PhotoArchive::buildArchive(const std::string& filename, const FileNameList&
             {
                delete [] newData;
 
-                osg::notify(osg::WARN) << "Error scaleImage() did not succeed : errorString = "<<gluErrorString((GLenum)status)<<std::endl;
+                osg::notify(osg::WARN) << "Error scaleImage() did not succeed : errorString = "<<osg::gluErrorString((GLenum)status)<<std::endl;
             }
     
             // now set up the photo header.
@@ -282,11 +282,11 @@ void PhotoArchive::buildArchive(const std::string& filename, const FileNameList&
                 return;
             }
 
-            PixelStorageModes psm;
+            osg::PixelStorageModes psm;
             psm.pack_alignment = image->getPacking();
             psm.unpack_alignment = image->getPacking();
 
-            GLint status = gluScaleImage(&psm, image->getPixelFormat(),
+            GLint status = osg::gluScaleImage(&psm, image->getPixelFormat(),
                 image->s(),
                 image->t(),
                 image->getDataType(),
@@ -300,7 +300,7 @@ void PhotoArchive::buildArchive(const std::string& filename, const FileNameList&
             {
                delete [] newData;
 
-                osg::notify(osg::WARN) << "Error scaleImage() did not succeed : errorString = "<<gluErrorString((GLenum)status)<<std::endl;
+                osg::notify(osg::WARN) << "Error scaleImage() did not succeed : errorString = "<<osg::gluErrorString((GLenum)status)<<std::endl;
             }
 
             ImageHeader imageHeader;
diff --git a/examples/osgtexture3D/osgtexture3D.cpp b/examples/osgtexture3D/osgtexture3D.cpp
index 329fc781b..76f33a279 100644
--- a/examples/osgtexture3D/osgtexture3D.cpp
+++ b/examples/osgtexture3D/osgtexture3D.cpp
@@ -38,52 +38,8 @@
 
 typedef std::vector< osg::ref_ptr<osg::Image> > ImageList;
 
-
-class MyGraphicsContext {
-    public:
-        MyGraphicsContext()
-        {
-            osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
-            traits->x = 0;
-            traits->y = 0;
-            traits->width = 1;
-            traits->height = 1;
-            traits->windowDecoration = false;
-            traits->doubleBuffer = false;
-            traits->sharedContext = 0;
-            traits->pbuffer = true;
-
-            _gc = osg::GraphicsContext::createGraphicsContext(traits.get());
-
-            if (!_gc)
-            {
-                traits->pbuffer = false;
-                _gc = osg::GraphicsContext::createGraphicsContext(traits.get());
-            }
-
-            if (_gc.valid()) 
-            {
-                _gc->realize();
-                _gc->makeCurrent();
-            }
-        }
-        
-        bool valid() const { return _gc.valid() && _gc->isRealized(); }
-        
-    private:
-        osg::ref_ptr<osg::GraphicsContext> _gc;
-};
-
-
 osg::StateSet* createState()
 {
-    MyGraphicsContext gc;
-    if (!gc.valid()) 
-    {
-        osg::notify(osg::NOTICE)<<"Unable to create the graphics context required to build 3d image."<<std::endl;
-        return 0;
-    }
-
     // read 4 2d images
     osg::ref_ptr<osg::Image> image_0 = osgDB::readImageFile("Images/lz.rgb");
     osg::ref_ptr<osg::Image> image_1 = osgDB::readImageFile("Images/reflect.rgb");
@@ -102,10 +58,7 @@ osg::StateSet* createState()
         return new osg::StateSet;
     }
 
-    // get max 3D texture size
-    GLint textureSize = osg::Texture3D::getExtensions(0,true)->maxTexture3DSize();
-    if (textureSize > 256)
-        textureSize = 256;
+    GLint textureSize = 256;
 
     // scale them all to the same size.
     image_0->scaleImage(textureSize,textureSize,1);
diff --git a/include/osg/GLU b/include/osg/GLU
index 8432c963b..6a98f7f2b 100644
--- a/include/osg/GLU
+++ b/include/osg/GLU
@@ -16,6 +16,9 @@
 
 #include <osg/GL>
 
+namespace osg
+{
+
 /* Pixel storage modes, used by gluScaleImage */
 struct OSG_EXPORT PixelStorageModes
 {
@@ -163,13 +166,15 @@ extern OSG_EXPORT GLUtesselator* gluNewTess (void);
 extern OSG_EXPORT void gluDeleteTess (GLUtesselator* tess);
 
 extern OSG_EXPORT void gluTessBeginContour (GLUtesselator* tess);
-extern OSG_EXPORT void gluTessBeginPolygon (GLUtesselator* tess, GLvoid* data);
 extern OSG_EXPORT void gluTessCallback (GLUtesselator* tess, GLenum which, _GLUfuncptr CallBackFunc);
 extern OSG_EXPORT void gluTessEndContour (GLUtesselator* tess);
-extern OSG_EXPORT void gluTessEndPolygon (GLUtesselator* tess);
 extern OSG_EXPORT void gluTessNormal (GLUtesselator* tess, GLdouble valueX, GLdouble valueY, GLdouble valueZ);
 extern OSG_EXPORT void gluTessProperty (GLUtesselator* tess, GLenum which, GLdouble data);
 extern OSG_EXPORT void gluTessVertex (GLUtesselator* tess, GLdouble *location, GLvoid* data);
+extern OSG_EXPORT void gluTessBeginPolygon (GLUtesselator* tess, GLvoid* data);
+extern OSG_EXPORT void gluTessEndPolygon (GLUtesselator* tess);
+extern OSG_EXPORT void gluGetTessProperty( GLUtesselator *tess, GLenum which, GLdouble *value );
 
+}
 
 #endif  // __osgGLU_h
diff --git a/include/osgUtil/Tessellator b/include/osgUtil/Tessellator
index e679b15f9..4225340ec 100644
--- a/include/osgUtil/Tessellator
+++ b/include/osgUtil/Tessellator
@@ -210,7 +210,7 @@ class OSGUTIL_EXPORT Tessellator : public osg::Referenced
         typedef std::vector<NewVertex> NewVertexList;
         typedef std::vector<Vec3d*> Vec3dList;
 
-        GLUtesselator*  _tobj;
+        osg::GLUtesselator*  _tobj;
 
         PrimList        _primList;
         Vec3dList       _coordData;
diff --git a/src/osg/Image.cpp b/src/osg/Image.cpp
index 796be4126..a6cb2dfc2 100644
--- a/src/osg/Image.cpp
+++ b/src/osg/Image.cpp
@@ -1003,7 +1003,7 @@ void Image::copySubImage(int s_offset, int t_offset, int r_offset, const osg::Im
 
     PixelStorageModes psm;
     psm.pack_alignment = _packing;
-    psm.pack_row_length = _packing;
+    psm.pack_row_length = _s;
     psm.unpack_alignment = _packing;
 
     GLint status = gluScaleImage(&psm, _pixelFormat,
diff --git a/src/osg/glu/libtess/tess.cpp b/src/osg/glu/libtess/tess.cpp
index c7a68aacb..1c7d91a08 100644
--- a/src/osg/glu/libtess/tess.cpp
+++ b/src/osg/glu/libtess/tess.cpp
@@ -54,6 +54,7 @@
 #define FALSE 0
 #endif
 
+
 /*ARGSUSED*/ static void GLAPIENTRY noBegin( GLenum type ) {}
 /*ARGSUSED*/ static void GLAPIENTRY noEdgeFlag( GLboolean boundaryEdge ) {}
 /*ARGSUSED*/ static void GLAPIENTRY noVertex( void *data ) {}
@@ -89,7 +90,7 @@ typedef struct { GLUhalfEdge e, eSym; } EdgePair;
 
 
 GLUtesselator * GLAPIENTRY
-gluNewTess( void )
+osg::gluNewTess( void )
 {
   GLUtesselator *tess;
 
@@ -190,7 +191,7 @@ static void GotoState( GLUtesselator *tess, enum TessState newState )
 
 
 void GLAPIENTRY
-gluDeleteTess( GLUtesselator *tess )
+osg::gluDeleteTess( GLUtesselator *tess )
 {
   RequireState( tess, T_DORMANT );
   memFree( tess );
@@ -198,7 +199,7 @@ gluDeleteTess( GLUtesselator *tess )
 
 
 void GLAPIENTRY
-gluTessProperty( GLUtesselator *tess, GLenum which, GLdouble value )
+osg::gluTessProperty( GLUtesselator *tess, GLenum which, GLdouble value )
 {
   GLenum windingRule;
 
@@ -237,7 +238,7 @@ gluTessProperty( GLUtesselator *tess, GLenum which, GLdouble value )
 
 /* Returns tessellator property */
 void GLAPIENTRY
-gluGetTessProperty( GLUtesselator *tess, GLenum which, GLdouble *value )
+osg::gluGetTessProperty( GLUtesselator *tess, GLenum which, GLdouble *value )
 {
    switch (which) {
    case GLU_TESS_TOLERANCE:
@@ -265,7 +266,7 @@ gluGetTessProperty( GLUtesselator *tess, GLenum which, GLdouble *value )
 } /* gluGetTessProperty() */
 
 void GLAPIENTRY
-gluTessNormal( GLUtesselator *tess, GLdouble x, GLdouble y, GLdouble z )
+osg::gluTessNormal( GLUtesselator *tess, GLdouble x, GLdouble y, GLdouble z )
 {
   tess->normal[0] = x;
   tess->normal[1] = y;
@@ -273,7 +274,7 @@ gluTessNormal( GLUtesselator *tess, GLdouble x, GLdouble y, GLdouble z )
 }
 
 void GLAPIENTRY
-gluTessCallback( GLUtesselator *tess, GLenum which, _GLUfuncptr fn)
+osg::gluTessCallback( GLUtesselator *tess, GLenum which, _GLUfuncptr fn)
 {
   switch( which ) {
   case GLU_TESS_BEGIN:
@@ -412,7 +413,7 @@ static int EmptyCache( GLUtesselator *tess )
 
 
 void GLAPIENTRY
-gluTessVertex( GLUtesselator *tess, GLdouble coords[3], void *data )
+osg::gluTessVertex( GLUtesselator *tess, GLdouble coords[3], void *data )
 {
   int i, tooLarge = FALSE;
   GLdouble x, clamped[3];
@@ -459,7 +460,7 @@ gluTessVertex( GLUtesselator *tess, GLdouble coords[3], void *data )
 
 
 void GLAPIENTRY
-gluTessBeginPolygon( GLUtesselator *tess, void *data )
+osg::gluTessBeginPolygon( GLUtesselator *tess, void *data )
 {
   RequireState( tess, T_DORMANT );
 
@@ -473,7 +474,7 @@ gluTessBeginPolygon( GLUtesselator *tess, void *data )
 
 
 void GLAPIENTRY
-gluTessBeginContour( GLUtesselator *tess )
+osg::gluTessBeginContour( GLUtesselator *tess )
 {
   RequireState( tess, T_IN_POLYGON );
 
@@ -490,14 +491,14 @@ gluTessBeginContour( GLUtesselator *tess )
 
 
 void GLAPIENTRY
-gluTessEndContour( GLUtesselator *tess )
+osg::gluTessEndContour( GLUtesselator *tess )
 {
   RequireState( tess, T_IN_CONTOUR );
   tess->state = T_IN_POLYGON;
 }
 
 void GLAPIENTRY
-gluTessEndPolygon( GLUtesselator *tess )
+osg::gluTessEndPolygon( GLUtesselator *tess )
 {
   GLUmesh *mesh;
 
@@ -590,43 +591,3 @@ gluTessEndPolygon( GLUtesselator *tess )
   tess->polygonData= NULL;
   tess->mesh = NULL;
 }
-
-
-/*XXXblythe unused function*/
-#if 0
-void GLAPIENTRY
-gluDeleteMesh( GLUmesh *mesh )
-{
-  __gl_meshDeleteMesh( mesh );
-}
-#endif
-
-
-
-/*******************************************************/
-
-/* Obsolete calls -- for backward compatibility */
-
-void GLAPIENTRY
-gluBeginPolygon( GLUtesselator *tess )
-{
-  gluTessBeginPolygon( tess, NULL );
-  gluTessBeginContour( tess );
-}
-
-
-/*ARGSUSED*/
-void GLAPIENTRY
-gluNextContour( GLUtesselator *tess, GLenum type )
-{
-  gluTessEndContour( tess );
-  gluTessBeginContour( tess );
-}
-
-
-void GLAPIENTRY
-gluEndPolygon( GLUtesselator *tess )
-{
-  gluTessEndContour( tess );
-  gluTessEndPolygon( tess );
-}
diff --git a/src/osg/glu/libtess/tess.h b/src/osg/glu/libtess/tess.h
index 912cc5b9d..d9594f363 100644
--- a/src/osg/glu/libtess/tess.h
+++ b/src/osg/glu/libtess/tess.h
@@ -46,7 +46,6 @@
 #include "dict.h"
 #include "priorityq.h"
 
-
 /* The begin/end calls must be properly nested.  We keep track of
  * the current state to enforce the ordering.
  */
@@ -62,7 +61,7 @@ typedef struct CachedVertex {
   void		*data;
 } CachedVertex;
 
-struct GLUtesselator {
+struct osg::GLUtesselator {
 
   /*** state needed for collecting the input data ***/
 
@@ -168,4 +167,9 @@ void GLAPIENTRY __gl_noCombineData( GLdouble coords[3], void *data[4],
       (*tess->callErrorData)((a),tess->polygonData); \
    else (*tess->callError)((a));
 
+// make it easy to introduce the namespace osg for the public functions and typedefs
+using osg::GLUtesselator;
+using osg::_GLUfuncptr;
+
+
 #endif
diff --git a/src/osg/glu/libutil/error.cpp b/src/osg/glu/libutil/error.cpp
index 1a65fc05c..0d601cf26 100644
--- a/src/osg/glu/libutil/error.cpp
+++ b/src/osg/glu/libutil/error.cpp
@@ -36,6 +36,9 @@
     #define GL_TABLE_TOO_LARGE  0x8031
 #endif
 
+namespace osg
+{
+
 static unsigned char *__gluNurbsErrors[] = {
     (unsigned char*) " ",
     (unsigned char*) "spline order un-supported",
@@ -140,3 +143,4 @@ const GLubyte* gluErrorString(GLenum errorCode)
     return (const GLubyte *) 0;
 }
 
+} // end of namespace osg
\ No newline at end of file
diff --git a/src/osg/glu/libutil/mipmap.cpp b/src/osg/glu/libutil/mipmap.cpp
index 8632c63b9..9b155cdf1 100644
--- a/src/osg/glu/libutil/mipmap.cpp
+++ b/src/osg/glu/libutil/mipmap.cpp
@@ -50,6 +50,9 @@
 #include <math.h>
 #include <osg/Notify>
 
+namespace osg
+{
+
 typedef union {
     unsigned char ub[4];
     unsigned short us[2];
@@ -8970,3 +8973,4 @@ static void halveImage3D(int components,
 
 /*** mipmap.c ***/
 
+} // end of namespace osg
\ No newline at end of file
diff --git a/src/osgPlugins/lwo/Tessellator.cpp b/src/osgPlugins/lwo/Tessellator.cpp
index bbfae77e8..51e6d2e82 100644
--- a/src/osgPlugins/lwo/Tessellator.cpp
+++ b/src/osgPlugins/lwo/Tessellator.cpp
@@ -44,15 +44,15 @@ bool Tessellator::tessellate(const Polygon &poly, const osg::Vec3Array *points,
     out_ = out;
     last_error_ = 0;
 
-    GLUtesselator *tess = gluNewTess();
+    osg::GLUtesselator *tess = osg::gluNewTess();
 
-    gluTessCallback(tess, GLU_TESS_BEGIN_DATA, (GLU_TESS_CALLBACK) (cb_begin_data));
-    gluTessCallback(tess, GLU_TESS_VERTEX_DATA, (GLU_TESS_CALLBACK) (cb_vertex_data));
-    gluTessCallback(tess, GLU_TESS_END_DATA, (GLU_TESS_CALLBACK) (cb_end_data));
-    gluTessCallback(tess, GLU_TESS_ERROR_DATA, (GLU_TESS_CALLBACK) (cb_error_data));
+    osg::gluTessCallback(tess, GLU_TESS_BEGIN_DATA, (osg::GLU_TESS_CALLBACK) (cb_begin_data));
+    osg::gluTessCallback(tess, GLU_TESS_VERTEX_DATA, (osg::GLU_TESS_CALLBACK) (cb_vertex_data));
+    osg::gluTessCallback(tess, GLU_TESS_END_DATA, (osg::GLU_TESS_CALLBACK) (cb_end_data));
+    osg::gluTessCallback(tess, GLU_TESS_ERROR_DATA, (osg::GLU_TESS_CALLBACK) (cb_error_data));
 
-    gluTessBeginPolygon(tess, this);
-    gluTessBeginContour(tess);    
+    osg::gluTessBeginPolygon(tess, this);
+    osg::gluTessBeginContour(tess);    
 
     double *vertices = new double[poly.indices().size() * 3];
     int *indices = new int[poly.indices().size()];
@@ -72,9 +72,9 @@ bool Tessellator::tessellate(const Polygon &poly, const osg::Vec3Array *points,
         gluTessVertex(tess, v, x);
     }
 
-    gluTessEndContour(tess);
-    gluTessEndPolygon(tess);
-    gluDeleteTess(tess);
+    osg::gluTessEndContour(tess);
+    osg::gluTessEndPolygon(tess);
+    osg::gluDeleteTess(tess);
 
     delete[] vertices;
     delete[] indices;
diff --git a/src/osgText/Glyph.cpp b/src/osgText/Glyph.cpp
index a4d613364..54120f3aa 100644
--- a/src/osgText/Glyph.cpp
+++ b/src/osgText/Glyph.cpp
@@ -434,7 +434,7 @@ void Glyph::subload() const
     GLenum errorNo = glGetError();
     if (errorNo!=GL_NO_ERROR)
     {
-        const GLubyte* msg = gluErrorString(errorNo);
+        const GLubyte* msg = osg::gluErrorString(errorNo);
         if (msg) { OSG_WARN<<"before Glyph::subload(): detected OpenGL error: "<<msg<<std::endl; }
         else  { OSG_WARN<<"before Glyph::subload(): detected OpenGL error number: "<<errorNo<<std::endl; }
     }
@@ -459,7 +459,7 @@ void Glyph::subload() const
     {
 
 
-        const GLubyte* msg = gluErrorString(errorNo);
+        const GLubyte* msg = osg::gluErrorString(errorNo);
         if (msg) { OSG_WARN<<"after Glyph::subload() : detected OpenGL error: "<<msg<<std::endl; }
         else { OSG_WARN<<"after Glyph::subload() : detected OpenGL error number: "<<errorNo<<std::endl; }