@Override
            public void invoke(long userData, int level, long message) {
                LOGGER.fine("LibOVR [" + userData + "] [" + level + "] " + memASCII(message));
            }
Frame buffers we can draw into.
jme3-vr/src/main/java/com/jme3/input/vr/oculus/OculusVR.java