public boolean isCurverSurface(){
        return useCurvedSurface;
    }
Get if the GUI has to use curved surface.
@return <code>true</code> if the GUI has to use curved surface and <code>false</code> otherwise.
@see #setCurvedSurface(boolean)
jme3-vr/src/main/java/com/jme3/util/VRGuiManager.java