From Farshid Lashkari, "I noticed that osg::State::getInitialViewMatrix returns the monocular view matrix when rendering in stereo. I've made some changes to osgUtil::RenderStage? & SceneView? so that it will return the correct view matrix depending on which eye is currently being rendered." & "I made a small change to the previous patch so that osg::State::getInitialViewMatrix works correctly with pre/post render stages as well."