@Override
    public void postRender() {
        super.postRender();

        // update compositor
        if( environment.getVRViewManager() != null ) {
            environment.getVRViewManager().postRender();
        }
    }
Set the {@link AppSettings settings} attached to this app state.
@param settings the {@link AppSettings settings} attached to this app state.
@see #getSettings()
jme3-vr/src/main/java/com/jme3/app/VRAppState.java