public void attachScene(Spatial scene) {
        if (scene == null) {
            throw new IllegalArgumentException("Scene cannot be null.");
        }
        sceneList.add(scene);
        if (scene instanceof Geometry) {
            scene.forceRefresh(true, false, true);
        }
    }
Attaches a new scene to render in this ViewPort.

@param scene The scene to attach

@see Spatial
jme3-core/src/main/java/com/jme3/renderer/ViewPort.java