public Camera getDummyCamera(){
        if (dummyCam == null){
            if (application != null){
                if (application.getCamera() != null){
                    dummyCam = application.getCamera().clone();
                } else {
                    if ((settings != null) && (settings.getWidth() != 0) && (settings.getHeight() != 0)){
                        dummyCam = new Camera(settings.getWidth(), settings.getHeight());
                    } else {
                        dummyCam = new Camera(0, 0);
                    }
                }
            } else {
                throw new IllegalStateException("VR environment is not attached to any application.");
            }
        }
        return dummyCam;
    }
Get the {@link Camera camera} used for rendering.
If the VR mode is {@link #isInVR() active}, this method return a dummy camera, otherwise,
this method return the camera of the attached application.
@return the camera attached used for rendering.
jme3-vr/src/main/java/com/jme3/app/VREnvironment.java