private void createSky() {
        Texture west = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_west.jpg");
        Texture east = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_east.jpg");
        Texture north = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_north.jpg");
        Texture south = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_south.jpg");
        Texture up = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_up.jpg");
        Texture down = assetManager.loadTexture("Textures/Sky/Lagoon/lagoon_down.jpg");

        Spatial sky = SkyFactory.createSky(assetManager, west, east, north, south, up, down);
        rootNode.attachChild(sky);
    }
Uses the terrain's lighting texture with normal maps and lights.

@author bowens
jme3-examples/src/main/java/jme3test/light/TestSpotLightTerrain.java