public BranchGroup createSceneGraph() {
	// Create the root of the branch graph
	BranchGroup objRoot = new BranchGroup();
	        
	...
	
	// Create Directional light with color and direction. Add it to scene.   
	DirectionalLight light = 
		new DirectionalLight(new Color3f(1.f,1.f,1.f),new Vector3f(-1,-1,0));
	light.setCapability(Light.ALLOW_COLOR_WRITE);
	light.setInfluencingBounds(new BoundingSphere());
	objRoot.addChild(light);
        
	// Create AmbientLight light with color. Add it to scene.   
	AmbientLight ambientLight = 
		new AmbientLight(new Color3f(.3f,.3f,.3f));
	ambientLight.setInfluencingBounds(new BoundingSphere());
	objRoot.addChild(ambientLight);
	    
	...
	return objRoot;
}