public void detachScene(Spatial scene) {
        if (scene == null) {
            throw new IllegalArgumentException("Scene cannot be null.");
        }
        sceneList.remove(scene);
        if (scene instanceof Geometry) {
            scene.forceRefresh(true, false, true);
        }
    }
Detaches a scene from rendering.

@param scene The scene to detach

@see #attachScene(com.jme3.scene.Spatial)
jme3-core/src/main/java/com/jme3/renderer/ViewPort.java