tRenderer.getCamera().setLocation(cam.getLocation());
tRenderer.getCamera().setDirection(cam.getDirection());
tRenderer.getCamera().setUp(cam.getUp());
tRenderer.getCamera().setLeft(cam.getLeft());
CullHint cullMode = CullHint.Dynamic;
if (skyBox != null) {
cullMode = skyBox.getSceneHints().getCullHint();
skyBox.getSceneHints().setCullHint(CullHint.Always);
}