diff --git a/examples/osgcamera/osgcamera.cpp b/examples/osgcamera/osgcamera.cpp
index f7cdc6193..24388bd45 100644
--- a/examples/osgcamera/osgcamera.cpp
+++ b/examples/osgcamera/osgcamera.cpp
@@ -39,9 +39,13 @@ int main( int argc, char **argv )
     viewer.setUpViewAcrossAllScreens();
     viewer.realize();
 
-    while(!viewer.done())
+    unsigned int numFrames = 0;
+    unsigned int maxFrames = 100;
+
+    while(!viewer.done() && numFrames<maxFrames)
     {
         viewer.frame();
+        ++numFrames;
     }
 
     return 0;
diff --git a/include/osg/GraphicsContext b/include/osg/GraphicsContext
index e8bfb9ded..911b36a2e 100644
--- a/include/osg/GraphicsContext
+++ b/include/osg/GraphicsContext
@@ -24,83 +24,91 @@ class OSG_EXPORT GraphicsContext : public Referenced
 {
     public:
     
-        struct ScreenIdentifier
+        struct OSG_EXPORT ScreenIdentifier
         {
             ScreenIdentifier():
-                _displayNum(0),
-                _screenNum(0) {}
+                displayNum(0),
+                screenNum(0) {}
 
-            ScreenIdentifier(unsigned int screenNum):
-                _displayNum(0),
-                _screenNum(screenNum) {}
+            ScreenIdentifier(unsigned int in_screenNum):
+                displayNum(0),
+                screenNum(in_screenNum) {}
 
-            ScreenIdentifier(const std::string& hostName,unsigned int displayNum, unsigned int screenNum):
-                _hostName(hostName),
-                _displayNum(displayNum),
-                _screenNum(screenNum) {}
+            ScreenIdentifier(const std::string& in_hostName,unsigned int in_displayNum, unsigned int in_screenNum):
+                hostName(in_hostName),
+                displayNum(in_displayNum),
+                screenNum(in_screenNum) {}
                 
-            std::string  _hostName;
-            unsigned int _displayNum;
-            unsigned int _screenNum;
+            std::string displayName() const;
+
+            std::string  hostName;
+            unsigned int displayNum;
+            unsigned int screenNum;
         };
     
         /** GraphicsContext Traits object provides the specification of what type of graphics context is required.*/
         struct Traits : public osg::Referenced, public ScreenIdentifier
         {
             Traits():
-                _x(0),
-                _y(0),
-                _width(0),
-                _height(0),
-                _windowDecoration(false),
-                _supportsResize(false),
-                _red(8),
-                _blue(8),
-                _green(8),
-                _alpha(0),
-                _depth(24),
-                _stencil(0),
-                _pbuffer(false),
-                _quadBufferStereo(false),
-                _doubleBuffer(false),
-                _target(0),
-                _level(0),
-                _face(0),
-                _mipMapGeneration(false),
-                _sharedContext() {}
+                x(0),
+                y(0),
+                width(0),
+                height(0),
+                windowDecoration(false),
+                supportsResize(false),
+                red(8),
+                blue(8),
+                green(8),
+                alpha(0),
+                depth(24),
+                stencil(0),
+                sampleBuffers(0),
+                samples(0),
+                pbuffer(false),
+                quadBufferStereo(false),
+                doubleBuffer(false),
+                target(0),
+                level(0),
+                face(0),
+                mipMapGeneration(false),
+                sharedContext(0) {}
                             
             // graphics context orginal and size
-            unsigned int _x;
-            unsigned int _y;
-            unsigned int _width;
-            unsigned int _height;
+            unsigned int x;
+            unsigned int y;
+            unsigned int width;
+            unsigned int height;
             
             // window decoration and baviour
-            std::string _windowName;
-            bool        _windowDecoration;
-            bool        _supportsResize;
+            std::string windowName;
+            bool        windowDecoration;
+            bool        supportsResize;
             
             // buffer depths, 0 equals off.
-            unsigned int _red;
-            unsigned int _blue;
-            unsigned int _green;
-            unsigned int _alpha;
-            unsigned int _depth;
-            unsigned int _stencil;
-            
+            unsigned int red;
+            unsigned int blue;
+            unsigned int green;
+            unsigned int alpha;
+            unsigned int depth;
+            unsigned int stencil;
+
+            // multi sample parameters
+            unsigned int sampleBuffers;
+            unsigned int samples;
+
             // buffer configuration
-            bool _pbuffer;
-            bool _quadBufferStereo;
-            bool _doubleBuffer;
+            bool pbuffer;
+            bool quadBufferStereo;
+            bool doubleBuffer;
 
             // render to texture
-            GLenum          _target;
-            unsigned int    _level;
-            unsigned int    _face;
-            unsigned int    _mipMapGeneration;
+            GLenum          target;
+            unsigned int    level;
+            unsigned int    face;
+            unsigned int    mipMapGeneration;
             
             // shared context
-            GraphicsContext* _sharedContext;
+            GraphicsContext* sharedContext;
         };
     
     
diff --git a/src/osg/GraphicsContext.cpp b/src/osg/GraphicsContext.cpp
index 350f63d69..5363be5b5 100644
--- a/src/osg/GraphicsContext.cpp
+++ b/src/osg/GraphicsContext.cpp
@@ -15,6 +15,7 @@
 #include <osg/GraphicsContext>
 #include <osg/Notify>
 #include <map>
+#include <sstream>
 
 using namespace osg;
 
@@ -39,6 +40,14 @@ GraphicsContext* GraphicsContext::createGraphicsContext(Traits* traits)
 }
 
 
+std::string GraphicsContext::ScreenIdentifier::displayName() const
+{
+    std::stringstream ostr;
+    ostr<<hostName<<":"<<displayNum<<"."<<screenNum;
+    return ostr.str();
+}
+
+
 typedef std::map<unsigned int, unsigned int>  ContextIDMap;
 static ContextIDMap s_contextIDMap;
 static OpenThreads::Mutex s_contextIDMapMutex;
diff --git a/src/osgProducer/GraphicsContextImplementation.cpp b/src/osgProducer/GraphicsContextImplementation.cpp
index e85316d73..50ae28dc1 100644
--- a/src/osgProducer/GraphicsContextImplementation.cpp
+++ b/src/osgProducer/GraphicsContextImplementation.cpp
@@ -22,7 +22,7 @@ namespace osgProducer
 {
     struct MyWindowingSystemInterface : public osg::GraphicsContext::WindowingSystemInterface
     {
-        virtual unsigned int getNumScreens(const osg::GraphicsContext::ScreenIdentifier& screenIdentifier) 
+        virtual unsigned int getNumScreens(const osg::GraphicsContext::ScreenIdentifier& /*screenIdentifier*/) 
         {
             return Producer::RenderSurface::getNumberOfScreens();
         }
@@ -30,9 +30,9 @@ namespace osgProducer
         virtual void getScreenResolution(const osg::GraphicsContext::ScreenIdentifier& screenIdentifier, unsigned int& width, unsigned int& height)
         {
             osg::ref_ptr<Producer::RenderSurface> rs = new Producer::RenderSurface;
-            rs->setHostName(screenIdentifier._hostName);
-            rs->setDisplayNum(screenIdentifier._displayNum);
-            rs->setScreenNum(screenIdentifier._screenNum);
+            rs->setHostName(screenIdentifier.hostName);
+            rs->setDisplayNum(screenIdentifier.displayNum);
+            rs->setScreenNum(screenIdentifier.screenNum);
             rs->getScreenSize(width, height);
         }
 
@@ -66,11 +66,11 @@ GraphicsContextImplementation::GraphicsContextImplementation(Traits* traits)
     _traits = traits;
 
     _rs = new Producer::RenderSurface;
-    _rs->setWindowName(traits->_windowName);
-    _rs->setWindowRectangle(traits->_x, traits->_y, traits->_width, traits->_height);
-    _rs->useBorder(traits->_windowDecoration);
-    _rs->setDisplayNum(traits->_displayNum);
-    _rs->setScreenNum(traits->_screenNum);
+    _rs->setWindowName(traits->windowName);
+    _rs->setWindowRectangle(traits->x, traits->y, traits->width, traits->height);
+    _rs->useBorder(traits->windowDecoration);
+    _rs->setDisplayNum(traits->displayNum);
+    _rs->setScreenNum(traits->screenNum);
     
 
     // set the visual chooser
@@ -81,35 +81,35 @@ GraphicsContextImplementation::GraphicsContextImplementation(Traits* traits)
         _rs->setVisualChooser(rs_vc);
     }
     
-    rs_vc->setRedSize(_traits->_red);
-    rs_vc->setGreenSize(_traits->_green);
-    rs_vc->setBlueSize(_traits->_blue);
-    rs_vc->setAlphaSize(_traits->_alpha);
+    rs_vc->setRedSize(_traits->red);
+    rs_vc->setGreenSize(_traits->green);
+    rs_vc->setBlueSize(_traits->blue);
+    rs_vc->setAlphaSize(_traits->alpha);
     
-    rs_vc->setDepthSize(_traits->_depth);
-    rs_vc->setStencilSize(_traits->_stencil);
+    rs_vc->setDepthSize(_traits->depth);
+    rs_vc->setStencilSize(_traits->stencil);
     
-    if (_traits->_doubleBuffer) rs_vc->useDoubleBuffer();
+    if (_traits->doubleBuffer) rs_vc->useDoubleBuffer();
 
     rs_vc->addAttribute( Producer::VisualChooser::RGBA );
 
     // Always use UseGL
     rs_vc->addAttribute( Producer::VisualChooser::UseGL );
  
-    if (traits->_pbuffer)
+    if (traits->pbuffer)
     {
         _rs->setDrawableType(Producer::RenderSurface::DrawableType_PBuffer);
 
-        if (traits->_target)
+        if (traits->target)
         {
 
-            _rs->setRenderToTextureOptions(traits->_mipMapGeneration ? Producer::RenderSurface::RequestSpaceForMipMaps :
+            _rs->setRenderToTextureOptions(traits->mipMapGeneration ? Producer::RenderSurface::RequestSpaceForMipMaps :
                                                                        Producer::RenderSurface::RenderToTextureOptions_Default);
-            _rs->setRenderToTextureMipMapLevel(traits->_level);
-            _rs->setRenderToTextureMode(traits->_alpha>0 ? Producer::RenderSurface::RenderToRGBATexture : 
+            _rs->setRenderToTextureMipMapLevel(traits->level);
+            _rs->setRenderToTextureMode(traits->alpha>0 ? Producer::RenderSurface::RenderToRGBATexture : 
                                                            Producer::RenderSurface::RenderToRGBTexture);
 
-            switch(traits->_target)
+            switch(traits->target)
             {
                 case(GL_TEXTURE_1D) : 
                     _rs->setRenderToTextureTarget(Producer::RenderSurface::Texture1D);
@@ -134,7 +134,7 @@ GraphicsContextImplementation::GraphicsContextImplementation(Traits* traits)
                 case(GL_TEXTURE_CUBE_MAP_POSITIVE_Z) : 
                 case(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) : 
                     _rs->setRenderToTextureTarget(Producer::RenderSurface::TextureCUBE);
-                    _rs->setRenderToTextureFace( Producer::RenderSurface::CubeMapFace(traits->_target - GL_TEXTURE_CUBE_MAP_POSITIVE_X));
+                    _rs->setRenderToTextureFace( Producer::RenderSurface::CubeMapFace(traits->target - GL_TEXTURE_CUBE_MAP_POSITIVE_X));
                     break;
             }
 
@@ -142,7 +142,7 @@ GraphicsContextImplementation::GraphicsContextImplementation(Traits* traits)
         
     }
     
-    GraphicsContextImplementation* sharedContext = dynamic_cast<GraphicsContextImplementation*>(traits->_sharedContext);
+    GraphicsContextImplementation* sharedContext = dynamic_cast<GraphicsContextImplementation*>(traits->sharedContext);
 
     if (sharedContext)
     {
@@ -184,9 +184,9 @@ GraphicsContextImplementation::GraphicsContextImplementation(Producer::RenderSur
     _closeOnDestruction = false;
 
     _traits = new osg::GraphicsContext::Traits;
-    _traits->_windowName = _rs->getWindowName();
-    _traits->_displayNum = _rs->getDisplayNum();
-    _traits->_screenNum = _rs->getScreenNum();
+    _traits->windowName = _rs->getWindowName();
+    _traits->displayNum = _rs->getDisplayNum();
+    _traits->screenNum = _rs->getScreenNum();
 }
 
 GraphicsContextImplementation::~GraphicsContextImplementation()
@@ -198,7 +198,7 @@ bool GraphicsContextImplementation::realizeImplementation()
 {
     if (_rs.valid()) 
     {
-        GraphicsContextImplementation* sharedContext = dynamic_cast<GraphicsContextImplementation*>(_traits->_sharedContext);
+        GraphicsContextImplementation* sharedContext = dynamic_cast<GraphicsContextImplementation*>(_traits->sharedContext);
 
         if (sharedContext)
         {
diff --git a/src/osgUtil/RenderStage.cpp b/src/osgUtil/RenderStage.cpp
index f34fb25f8..917563abd 100644
--- a/src/osgUtil/RenderStage.cpp
+++ b/src/osgUtil/RenderStage.cpp
@@ -437,14 +437,14 @@ void RenderStage::runCameraSetUp(osg::RenderInfo& renderInfo)
             // set up the traits of the graphics context that we want
             osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
 
-            traits->_width = width;
-            traits->_height = height;
+            traits->width = width;
+            traits->height = height;
 
-            // osg::notify(osg::NOTICE)<<"traits = "<<traits->_width<<" "<<traits->_height<<std::endl;
+            // osg::notify(osg::NOTICE)<<"traits = "<<traits->width<<" "<<traits->height<<std::endl;
 
-            traits->_pbuffer = (renderTargetImplemntation==osg::Camera::PIXEL_BUFFER || renderTargetImplemntation==osg::Camera::PIXEL_BUFFER_RTT);
-            traits->_windowDecoration = (renderTargetImplemntation==osg::Camera::SEPERATE_WINDOW);
-            traits->_doubleBuffer = (renderTargetImplemntation==osg::Camera::SEPERATE_WINDOW);
+            traits->pbuffer = (renderTargetImplemntation==osg::Camera::PIXEL_BUFFER || renderTargetImplemntation==osg::Camera::PIXEL_BUFFER_RTT);
+            traits->windowDecoration = (renderTargetImplemntation==osg::Camera::SEPERATE_WINDOW);
+            traits->doubleBuffer = (renderTargetImplemntation==osg::Camera::SEPERATE_WINDOW);
 
             osg::Texture* pBufferTexture = 0;
             GLenum bufferFormat = GL_NONE;
@@ -465,13 +465,13 @@ void RenderStage::runCameraSetUp(osg::RenderInfo& renderInfo)
                 {
                     case(osg::Camera::DEPTH_BUFFER):
                     {
-                        traits->_depth = 24;
+                        traits->depth = 24;
                         depthAttached = true;
                         break;
                     }
                     case(osg::Camera::STENCIL_BUFFER):
                     {
-                        traits->_stencil = 8;
+                        traits->stencil = 8;
                         stencilAttached = true;
                         break;
                     }
@@ -503,10 +503,10 @@ void RenderStage::runCameraSetUp(osg::RenderInfo& renderInfo)
 
                         if (renderTargetImplemntation==osg::Camera::PIXEL_BUFFER_RTT)
                         {
-                            traits->_target = bufferFormat;
-                            traits->_level = level;
-                            traits->_face = face;
-                            traits->_mipMapGeneration = attachment._mipMapGeneration;
+                            traits->target = bufferFormat;
+                            traits->level = level;
+                            traits->face = face;
+                            traits->mipMapGeneration = attachment._mipMapGeneration;
                         }
                         break;
                     }
@@ -526,29 +526,30 @@ void RenderStage::runCameraSetUp(osg::RenderInfo& renderInfo)
 
             if (!depthAttached)
             {                
-                traits->_depth = 24;
+                traits->depth = 24;
             }
 
             if (!colorAttached)
             {                
                 if (bufferFormat == GL_NONE) bufferFormat = GL_RGB;
 
-                traits->_red = 8;
-                traits->_green = 8;
-                traits->_blue = 8;
-                traits->_alpha = (bufferFormat==GL_RGBA) ? 8 : 0;
+                traits->red = 8;
+                traits->green = 8;
+                traits->blue = 8;
+                traits->alpha = (bufferFormat==GL_RGBA) ? 8 : 0;
             }
 
             // share OpenGL objects if possible...
             if (state.getGraphicsContext())
             {
-                traits->_sharedContext = state.getGraphicsContext();
+                traits->sharedContext = state.getGraphicsContext();
                 
-                const osg::GraphicsContext::Traits* sharedTraits = traits->_sharedContext->getTraits();
+                const osg::GraphicsContext::Traits* sharedTraits = traits->sharedContext->getTraits();
                 if (sharedTraits)
                 {
-                    traits->_displayNum = sharedTraits->_displayNum;
-                    traits->_screenNum = sharedTraits->_screenNum;
+                    traits->hostName = sharedTraits->hostName;
+                    traits->displayNum = sharedTraits->displayNum;
+                    traits->screenNum = sharedTraits->screenNum;
                 }
             }
 
diff --git a/src/osgUtil/SceneView.cpp b/src/osgUtil/SceneView.cpp
index 4657b71e4..9081cbeab 100644
--- a/src/osgUtil/SceneView.cpp
+++ b/src/osgUtil/SceneView.cpp
@@ -117,7 +117,9 @@ SceneView::SceneView(DisplaySettings* ds)
     _interlacedStereoStencilHeight = 0;
 }
 
-SceneView::SceneView(const SceneView& rhs, const osg::CopyOp&)
+SceneView::SceneView(const SceneView& rhs, const osg::CopyOp& copyop):
+    osg::Object(rhs,copyop),
+    osg::CullSettings(rhs)
 {
     _displaySettings = rhs._displaySettings;
 
diff --git a/src/osgViewer/GraphicsWindowX11.cpp b/src/osgViewer/GraphicsWindowX11.cpp
index 37d48633c..7f322c38b 100644
--- a/src/osgViewer/GraphicsWindowX11.cpp
+++ b/src/osgViewer/GraphicsWindowX11.cpp
@@ -87,19 +87,25 @@ bool GraphicsWindowX11::createVisualInfo()
     
     attributes.push_back(GLX_RGBA);
     
-    if (_traits->_doubleBuffer) attributes.push_back(GLX_DOUBLEBUFFER);
+    if (_traits->doubleBuffer) attributes.push_back(GLX_DOUBLEBUFFER);
     
-    if (_traits->_quadBufferStereo) attributes.push_back(GLX_STEREO);
+    if (_traits->quadBufferStereo) attributes.push_back(GLX_STEREO);
     
-    attributes.push_back(GLX_RED_SIZE); attributes.push_back(_traits->_red);
-    attributes.push_back(GLX_GREEN_SIZE); attributes.push_back(_traits->_green);
-    attributes.push_back(GLX_BLUE_SIZE); attributes.push_back(_traits->_blue);
-    attributes.push_back(GLX_DEPTH_SIZE); attributes.push_back(_traits->_depth);
+    attributes.push_back(GLX_RED_SIZE); attributes.push_back(_traits->red);
+    attributes.push_back(GLX_GREEN_SIZE); attributes.push_back(_traits->green);
+    attributes.push_back(GLX_BLUE_SIZE); attributes.push_back(_traits->blue);
+    attributes.push_back(GLX_DEPTH_SIZE); attributes.push_back(_traits->depth);
     
-    if (_traits->_alpha) { attributes.push_back(GLX_ALPHA_SIZE); attributes.push_back(_traits->_alpha); }
+    if (_traits->alpha) { attributes.push_back(GLX_ALPHA_SIZE); attributes.push_back(_traits->alpha); }
     
-    if (_traits->_stencil) { attributes.push_back(GLX_STENCIL_SIZE); attributes.push_back(_traits->_stencil); }
+    if (_traits->stencil) { attributes.push_back(GLX_STENCIL_SIZE); attributes.push_back(_traits->stencil); }
 
+#if defined(GLX_SAMPLE_BUFFERS) && defined (GLX_SAMPLES)
+
+    if (_traits->sampleBuffers) { attributes.push_back(GLX_SAMPLE_BUFFERS); attributes.push_back(_traits->sampleBuffers); }
+    if (_traits->sampleBuffers) { attributes.push_back(GLX_SAMPLES); attributes.push_back(_traits->samples); }
+
+#endif
     // TODO
     //  GLX_AUX_BUFFERS
     //  GLX_ACCUM_RED_SIZE
@@ -109,7 +115,7 @@ bool GraphicsWindowX11::createVisualInfo()
     
     attributes.push_back(None);
     
-    _visualInfo = glXChooseVisual( _display, _traits->_screenNum, &(attributes.front()) );
+    _visualInfo = glXChooseVisual( _display, _traits->screenNum, &(attributes.front()) );
 
     return _visualInfo != 0;
 }
@@ -173,8 +179,8 @@ void GraphicsWindowX11::setWindowDecoration(bool flag)
 #if 0
         // now update the window dimensions to account for any size changes made by the window manager,
         XGetWindowAttributes( _display, _window, &watt );
-        _traits->_width = watt.width;
-        _traits->_height = watt.height;
+        _traits->width = watt.width;
+        _traits->height = watt.height;
 #endif
 
     }
@@ -186,22 +192,20 @@ void GraphicsWindowX11::init()
 {
     if (!_traits || _initialized) return;
 
-    const char* displayString = _traits->_hostName.c_str();
-    _display = XOpenDisplay(displayString);
+    _display = XOpenDisplay(_traits->displayName().c_str());
     
-    unsigned int screen = _traits->_screenNum;
+    unsigned int screen = _traits->screenNum;
 
     if (!_display)
     {
-        osg::notify(osg::NOTICE)<<"Error: Unable to open display \"" << XDisplayName(displayString) << "\".  Is the DISPLAY environmental variable set?"<<std::endl;
-        return;
+        osg::notify(osg::NOTICE)<<"Error: Unable to open display \"" << XDisplayName(_traits->displayName().c_str()) << "\".  Is the DISPLAY environmental variable set?"<<std::endl;
     }
 
      // Query for GLX extension
     int errorBase, eventBase;
     if( glXQueryExtension( _display, &errorBase, &eventBase)  == False )
     {
-        osg::notify(osg::NOTICE)<<"Error: " << XDisplayName(displayString) <<" has no GLX extension." << std::endl;
+        osg::notify(osg::NOTICE)<<"Error: " << XDisplayName(_traits->displayName().c_str()) <<" has no GLX extension." << std::endl;
 
         XCloseDisplay( _display );
         _display = 0;
@@ -249,9 +253,9 @@ void GraphicsWindowX11::init()
     }
 
     _window = XCreateWindow( _display, _parent,
-                             _traits->_x,
-                             _traits->_y,
-                             _traits->_width, _traits->_height, 0,
+                             _traits->x,
+                             _traits->y,
+                             _traits->width, _traits->height, 0,
                              _visualInfo->depth, InputOutput,
                              _visualInfo->visual, mask, &swatt );
                              
@@ -268,14 +272,14 @@ void GraphicsWindowX11::init()
     sh.flags &= 0x7;
     sh.flags |= USPosition;
     sh.flags &= 0xB;
-    sh.x = _traits->_x;
-    sh.y = _traits->_y;
-    sh.width  = _traits->_width;
-    sh.height = _traits->_height;
-    XSetStandardProperties( _display, _window, _traits->_windowName.c_str(), _traits->_windowName.c_str(), None, 0, 0, &sh);
+    sh.x = _traits->x;
+    sh.y = _traits->y;
+    sh.width  = _traits->width;
+    sh.height = _traits->height;
+    XSetStandardProperties( _display, _window, _traits->windowName.c_str(), _traits->windowName.c_str(), None, 0, 0, &sh);
 
 #if 1
-    setWindowDecoration(_traits->_windowDecoration);
+    setWindowDecoration(_traits->windowDecoration);
 #else
     setWindowDecoration(true);
 #endif
@@ -314,8 +318,8 @@ void GraphicsWindowX11::init()
 
     // now update the window dimensions to account for any size changes made by the window manager,
     XGetWindowAttributes( _display, _window, &watt );
-    _traits->_width = watt.width;
-    _traits->_height = watt.height;
+    _traits->width = watt.width;
+    _traits->height = watt.height;
     
     //osg::notify(osg::NOTICE)<<"After sync apply.x = "<<watt.x<<" watt.y="<<watt.y<<" width="<<watt.width<<" height="<<watt.height<<std::endl;
 
@@ -428,10 +432,10 @@ void GraphicsWindowX11::checkEvents()
             {
                 osg::notify(osg::INFO)<<"ConfigureNotify x="<<ev.xconfigure.x<<" y="<<ev.xconfigure.y<<" width="<<ev.xconfigure.width<<", height="<<ev.xconfigure.height<<std::endl;
 
-                _traits->_x = ev.xconfigure.x;
-                _traits->_y = ev.xconfigure.y;
-                _traits->_width = ev.xconfigure.width;
-                _traits->_height = ev.xconfigure.height;
+                _traits->x = ev.xconfigure.x;
+                _traits->y = ev.xconfigure.y;
+                _traits->width = ev.xconfigure.width;
+                _traits->height = ev.xconfigure.height;
                 // need to dispatch resize event.
                 break;
             }
@@ -445,8 +449,8 @@ void GraphicsWindowX11::checkEvents()
                 while( watt.map_state != IsViewable );
                 
                 osg::notify(osg::INFO)<<"MapNotify x="<<watt.x<<" y="<<watt.y<<" width="<<watt.width<<", height="<<watt.height<<std::endl;
-                _traits->_width = watt.width;
-                _traits->_height = watt.height;
+                _traits->width = watt.width;
+                _traits->height = watt.height;
 
                 break;
             }
@@ -484,7 +488,7 @@ void GraphicsWindowX11::checkEvents()
                         screenOrigin_x += DisplayWidth(_display, i);
                     }
 
-                    for(i= 0; i < static_cast<int>(_traits->_screenNum); i++ )
+                    for(i= 0; i < static_cast<int>(_traits->screenNum); i++ )
                     {
                         screenOrigin_x -= DisplayWidth(_display, i);
                     }
@@ -603,8 +607,8 @@ void GraphicsWindowX11::transformMouseXY(float& x, float& y)
     if (getEventQueue()->getUseFixedMouseInputRange())
     {
         osgGA::GUIEventAdapter* eventState = getEventQueue()->getCurrentEventState();
-        x = eventState->getXmin() + (eventState->getXmax()-eventState->getXmin())*x/float(_traits->_width);
-        y = eventState->getYmin() + (eventState->getYmax()-eventState->getYmin())*y/float(_traits->_height);
+        x = eventState->getXmin() + (eventState->getXmax()-eventState->getXmin())*x/float(_traits->width);
+        y = eventState->getYmin() + (eventState->getYmax()-eventState->getYmin())*y/float(_traits->height);
     }
 }
 
@@ -665,8 +669,7 @@ struct X11WindowingSystemInterface : public osg::GraphicsContext::WindowingSyste
 
     virtual unsigned int getNumScreens(const osg::GraphicsContext::ScreenIdentifier& si) 
     {
-        const char* displayString = si._hostName.c_str();
-        Display* display = XOpenDisplay(displayString);
+        Display* display = XOpenDisplay(si.displayName().c_str());
         if(display)
         {
             unsigned int numScreens = ScreenCount(display); 
@@ -676,19 +679,19 @@ struct X11WindowingSystemInterface : public osg::GraphicsContext::WindowingSyste
         }
         else
         {
-            osg::notify(osg::NOTICE) << "Unable to open display \"" << XDisplayName(displayString) << "\".  Is the DISPLAY environmental variable set?"<<std::endl;
+            osg::notify(osg::NOTICE) << "Unable to open display \"" << XDisplayName(si.displayName().c_str()) << "\".  Is the DISPLAY environmental variable set?"<<std::endl;
             return 0;
         }
     }
 
     virtual void getScreenResolution(const osg::GraphicsContext::ScreenIdentifier& si, unsigned int& width, unsigned int& height)
     {
-        const char* displayString = si._hostName.c_str();
+        const char* displayString = si.displayName().c_str();
         Display* display = XOpenDisplay(displayString);
         if(display)
         {
-            width = DisplayWidth(display, si._screenNum);
-            height = DisplayHeight(display, si._screenNum);
+            width = DisplayWidth(display, si.screenNum);
+            height = DisplayHeight(display, si.screenNum);
             XCloseDisplay(display);
         }
         else
@@ -701,7 +704,7 @@ struct X11WindowingSystemInterface : public osg::GraphicsContext::WindowingSyste
 
     virtual osg::GraphicsContext* createGraphicsContext(osg::GraphicsContext::Traits* traits)
     {
-        if (traits->_pbuffer)
+        if (traits->pbuffer)
         {
             return new GraphicsContextX11(traits);
         }
diff --git a/src/osgViewer/View.cpp b/src/osgViewer/View.cpp
index ba515a17f..f82995980 100644
--- a/src/osgViewer/View.cpp
+++ b/src/osgViewer/View.cpp
@@ -24,7 +24,7 @@ public:
         virtual ~ActionAdapter() {}
 
         virtual void requestRedraw() { /*osg::notify(osg::NOTICE)<<"requestRedraw()"<<std::endl;*/ }
-        virtual void requestContinuousUpdate(bool needed=true) { /*osg::notify(osg::NOTICE)<<"requestContinuousUpdate("<<needed<<")"<<std::endl;*/ }
+        virtual void requestContinuousUpdate(bool /*needed*/=true) { /*osg::notify(osg::NOTICE)<<"requestContinuousUpdate("<<needed<<")"<<std::endl;*/ }
         virtual void requestWarpPointer(float x,float y) { osg::notify(osg::NOTICE)<<"requestWarpPointer("<<x<<","<<y<<")"<<std::endl; }
 
 };
@@ -84,13 +84,13 @@ void View::setUpViewAcrossAllScreens()
             wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), width, height);
 
             osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
-            traits->_x = 0;
-            traits->_y = 0;
-            traits->_width = width;
-            traits->_height = height;
-            traits->_windowDecoration = false;
-            traits->_doubleBuffer = true;
-            traits->_sharedContext = 0;
+            traits->x = 0;
+            traits->y = 0;
+            traits->width = width;
+            traits->height = height;
+            traits->windowDecoration = false;
+            traits->doubleBuffer = true;
+            traits->sharedContext = 0;
             
             osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
             
@@ -123,14 +123,14 @@ void View::setUpViewAcrossAllScreens()
             wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(i), width, height);
 
             osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
-            traits->_screenNum = i;
-            traits->_x = 0;
-            traits->_y = 0;
-            traits->_width = width;
-            traits->_height = height;
-            traits->_windowDecoration = false;
-            traits->_doubleBuffer = true;
-            traits->_sharedContext = 0;
+            traits->screenNum = i;
+            traits->x = 0;
+            traits->y = 0;
+            traits->width = width;
+            traits->height = height;
+            traits->windowDecoration = false;
+            traits->doubleBuffer = true;
+            traits->sharedContext = 0;
             
             osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());