private static Node createDummyScene() {
        Node scene = new Node("Scene Node");

        Node a = new Node("A");
        Node b = new Node("B");

        Node c = new Node("C");
        Node d = new Node("D");

        Node e = new Node("E");
        Node f = new Node("F");

        Node g = new Node("G");
        Node h = new Node("H");
        Node j = new Node("J");

        scene.attachChild(a);
        scene.attachChild(b);

        a.attachChild(c);
        a.attachChild(d);

        b.attachChild(e);
        b.attachChild(f);

        c.attachChild(g);
        c.attachChild(h);
        c.attachChild(j);

        return scene;
    }
Validates how {@link MatParamOverride MPOs} work on the scene level.

@author Kirill Vainer
jme3-core/src/test/java/com/jme3/scene/SceneMatParamOverrideTest.java