diff --git a/applications/present3D/present3D.cpp b/applications/present3D/present3D.cpp
index 838a3731d..3d53439a1 100644
--- a/applications/present3D/present3D.cpp
+++ b/applications/present3D/present3D.cpp
@@ -128,6 +128,8 @@ void setViewer(osgViewer::Viewer& viewer, float width, float height, float dista
     // double hfov = osg::RadiansToDegrees(atan2(width/2.0f,distance)*2.0);
 
     viewer.getCamera()->setProjectionMatrixAsPerspective( vfov, width/height, 0.1, 1000.0);
+
+    OSG_NOTICE<<"setProjectionMatrixAsPerspective( "<<vfov<<", "<<width/height<<", "<<0.1<<", "<<1000.0<<");"<<std::endl;
 }
 
 class ForwardToDeviceEventHandler : public osgGA::GUIEventHandler {
diff --git a/examples/osgframerenderer/CaptureSettings.cpp b/examples/osgframerenderer/CaptureSettings.cpp
index 23df7cd65..a7be9c3bb 100644
--- a/examples/osgframerenderer/CaptureSettings.cpp
+++ b/examples/osgframerenderer/CaptureSettings.cpp
@@ -157,7 +157,7 @@ REGISTER_OBJECT_WRAPPER( gsc_CaptureSettings,
         ADD_ENUM_VALUE( OFF );
         ADD_ENUM_VALUE( HORIZONTAL_SPLIT );
         ADD_ENUM_VALUE( VERTICAL_SPLIT );
-    END_ENUM_SERIALIZER();  // _renderTargetImplementation
+    END_ENUM_SERIALIZER();
 
     ADD_BOOL_SERIALIZER( Offscreen, false );
     ADD_BOOL_SERIALIZER( OutputImageFlip, false );
@@ -168,6 +168,11 @@ REGISTER_OBJECT_WRAPPER( gsc_CaptureSettings,
     ADD_FLOAT_SERIALIZER( ScreenWidth, 0.0 );
     ADD_FLOAT_SERIALIZER( ScreenHeight, 0.0 );
     ADD_FLOAT_SERIALIZER( ScreenDistance, 0.0 );
+
+    BEGIN_ENUM_SERIALIZER( PixelFormat, RGB );
+        ADD_ENUM_VALUE( RGB );
+        ADD_ENUM_VALUE( RGBA );
+    END_ENUM_SERIALIZER();
     
     ADD_UINT_SERIALIZER( Samples, 0 );
     ADD_UINT_SERIALIZER( SampleBuffers, 0 );
diff --git a/examples/osgframerenderer/CaptureSettings.h b/examples/osgframerenderer/CaptureSettings.h
index 0b022e8e6..8d3d99eed 100644
--- a/examples/osgframerenderer/CaptureSettings.h
+++ b/examples/osgframerenderer/CaptureSettings.h
@@ -60,6 +60,16 @@ public:
     void setScreenDistance(float distance) { _screenDistance = distance; }
     float getScreenDistance() const { return _screenDistance; }
 
+
+    enum PixelFormat
+    {
+        RGB,
+        RGBA
+    };
+    
+    void setPixelFormat(PixelFormat format) { _pixelFormat = format; }
+    PixelFormat getPixelFormat() const { return _pixelFormat; }
+
     void setSamples(unsigned int s) { _samples = s; }
     unsigned int getSamples() const { return _samples; }
 
@@ -121,6 +131,7 @@ protected:
     float                               _screenHeight;
     float                               _screenDistance;
 
+    PixelFormat                         _pixelFormat;
     unsigned int                        _samples;
     unsigned int                        _sampleBuffers;
     
diff --git a/examples/osgframerenderer/osgframerenderer.cpp b/examples/osgframerenderer/osgframerenderer.cpp
index 2e0a5affe..baf8f2c9c 100644
--- a/examples/osgframerenderer/osgframerenderer.cpp
+++ b/examples/osgframerenderer/osgframerenderer.cpp
@@ -17,7 +17,8 @@
 
 struct ScreenShot : public osg::Camera::DrawCallback
 {
-    ScreenShot(bool flip):
+    ScreenShot(GLenum pixelFormat, bool flip):
+        _pixelFormat(pixelFormat),
         _flip(flip) {}
 
     virtual void operator () (osg::RenderInfo& renderInfo) const
@@ -41,13 +42,13 @@ struct ScreenShot : public osg::Camera::DrawCallback
         osg::Viewport* viewport = camera ? camera->getViewport() : 0;
         if (viewport)
         {
-            OSG_NOTICE<<"Doing read of ="<<viewport->x()<<", "<<viewport->y()<<", "<<viewport->width()<<", "<<viewport->height()<<std::endl;
+            OSG_NOTICE<<"Doing read of ="<<viewport->x()<<", "<<viewport->y()<<", "<<viewport->width()<<", "<<viewport->height()<<" with pixelFormat=0x"<<std::hex<<_pixelFormat<<std::dec<<std::endl;
 
             glReadBuffer(camera->getDrawBuffer());
             osg::ref_ptr<osg::Image> image = new osg::Image;
             
             image->readPixels(viewport->x(),viewport->y(),viewport->width(),viewport->height(),
-                              GL_RGB, GL_UNSIGNED_BYTE, 1);
+                              _pixelFormat, GL_UNSIGNED_BYTE, 1);
 
             if (_flip) image->flipVertical();
 
@@ -58,6 +59,7 @@ struct ScreenShot : public osg::Camera::DrawCallback
 
     typedef std::map<const osg::Camera*, unsigned int> CameraNumMap;
 
+    GLenum                                      _pixelFormat;
     bool                                        _flip;
     osg::ref_ptr<gsc::CaptureSettings>          _frameCapture;
     CameraNumMap                                _cameraNumMap;
@@ -239,8 +241,13 @@ int main( int argc, char **argv )
     unsigned int height = 512;
     if (arguments.read("--height",height)) fc->setHeight(height);
 
+    if (arguments.read("--rgb")) fc->setPixelFormat(gsc::CaptureSettings::RGB);
+    if (arguments.read("--rgba")) fc->setPixelFormat(gsc::CaptureSettings::RGBA);
     
-    
+    osg::Vec4 clearColor(0.0f,0.0f,0.0f,0.0f);
+    while (arguments.read("--clear-color",clearColor[0],clearColor[1],clearColor[2],clearColor[3])) {}
+
+
     unsigned int samples = 0;
     if (arguments.read("--samples",samples)) fc->setSamples(samples);
 
@@ -380,6 +387,7 @@ int main( int argc, char **argv )
         traits->y = 0;
         traits->width = fc->getWidth();
         traits->height = fc->getHeight();
+        traits->alpha = (fc->getPixelFormat() == gsc::CaptureSettings::RGBA) ? 8 : 0;
         traits->samples = fc->getSamples();
         traits->sampleBuffers = fc->getSampleBuffers();
         traits->windowDecoration = !(fc->getOffscreen());
@@ -394,7 +402,7 @@ int main( int argc, char **argv )
             return 1;
         }
 
-
+        viewer.getCamera()->setClearColor(clearColor);
         viewer.getCamera()->setGraphicsContext(gc.get());
         viewer.getCamera()->setDisplaySettings(ds.get());
 
@@ -417,6 +425,10 @@ int main( int argc, char **argv )
             // double hfov = osg::RadiansToDegrees(atan2(width/2.0f,distance)*2.0);
 
             viewer.getCamera()->setProjectionMatrixAsPerspective( vfov*fovy_multiple, (screenWidth/screenHeight)*fovx_multiple, 0.1, 1000.0);
+
+            OSG_NOTICE<<"setProjectionMatrixAsPerspective( "<<vfov*fovy_multiple<<", "<<(screenWidth/screenHeight)*fovx_multiple<<", "<<0.1<<", "<<1000.0<<");"<<std::endl;
+
+            
         }
         else
         {
@@ -466,13 +478,15 @@ int main( int argc, char **argv )
                 break;
         }
     }
+
+    GLenum pixelFormat = (fc->getPixelFormat()==gsc::CaptureSettings::RGBA) ? GL_RGBA : GL_RGB;
     
 
     viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
     viewer.realize();
 
     // set up screen shot
-    osg::ref_ptr<ScreenShot> screenShot = new ScreenShot(fc->getOutputImageFlip());;
+    osg::ref_ptr<ScreenShot> screenShot = new ScreenShot(pixelFormat, fc->getOutputImageFlip());;
     {
 
         osgViewer::Viewer::Cameras cameras;
diff --git a/src/osgPlugins/p3d/ReaderWriterP3D.cpp b/src/osgPlugins/p3d/ReaderWriterP3D.cpp
index ff1755512..ae9b4ef2e 100644
--- a/src/osgPlugins/p3d/ReaderWriterP3D.cpp
+++ b/src/osgPlugins/p3d/ReaderWriterP3D.cpp
@@ -41,15 +41,15 @@ class ReaderWriterP3DXML : public osgDB::ReaderWriter
 public:
     ReaderWriterP3DXML()
     {
-        _colorMap["WHITE"]  .set(1.0f,1.0f,1.0f,1.0f);
-        _colorMap["BLACK"]  .set(0.0f,0.0f,0.0f,1.0f);
-        _colorMap["PURPLE"] .set(1.0f,0.0f,1.0f,1.0f);
-        _colorMap["BLUE"]   .set(0.0f,0.0f,1.0f,1.0f);
-        _colorMap["RED"]    .set(1.0f,0.0f,0.0f,1.0f);
-        _colorMap["CYAN"]   .set(0.0f,1.0f,1.0f,1.0f);
-        _colorMap["YELLOW"] .set(1.0f,1.0f,0.0f,1.0f);
-        _colorMap["GREEN"]  .set(0.0f,1.0f,0.0f,1.0f);
-        _colorMap["SKY"]    .set(0.2f, 0.2f, 0.4f, 1.0f);
+        _colorMap["WHITE"]  .set(1.0f,1.0f,1.0f,0.0f);
+        _colorMap["BLACK"]  .set(0.0f,0.0f,0.0f,0.0f);
+        _colorMap["PURPLE"] .set(1.0f,0.0f,1.0f,0.0f);
+        _colorMap["BLUE"]   .set(0.0f,0.0f,1.0f,0.0f);
+        _colorMap["RED"]    .set(1.0f,0.0f,0.0f,0.0f);
+        _colorMap["CYAN"]   .set(0.0f,1.0f,1.0f,0.0f);
+        _colorMap["YELLOW"] .set(1.0f,1.0f,0.0f,0.0f);
+        _colorMap["GREEN"]  .set(0.0f,1.0f,0.0f,0.0f);
+        _colorMap["SKY"]    .set(0.2f, 0.2f, 0.4f, 0.0f);
 
         _layoutMap["LEFT_TO_RIGHT"] = osgText::Text::LEFT_TO_RIGHT;
         _layoutMap["RIGHT_TO_LEFT"] = osgText::Text::RIGHT_TO_LEFT;
diff --git a/src/osgPresentation/SlideShowConstructor.cpp b/src/osgPresentation/SlideShowConstructor.cpp
index beaf4762e..3c2c8e1e7 100644
--- a/src/osgPresentation/SlideShowConstructor.cpp
+++ b/src/osgPresentation/SlideShowConstructor.cpp
@@ -168,7 +168,7 @@ SlideShowConstructor::SlideShowConstructor(osgDB::Options* options):
 
     _hudSettings = new HUDSettings(_slideDistance, ds->getEyeSeparation()*0.5, _leftEyeMask, _rightEyeMask);
 
-    _backgroundColor.set(0.0f,0.0f,0.0f,1.0f);
+    _backgroundColor.set(0.0f,0.0f,0.0f,0.0f);
 
     _presentationDuration = -1.0;