private Spatial constructSceneGraph() {
        // Acquire the implicit root object.
        FbxNode fbxRoot = (FbxNode) objectMap.get(FbxId.ROOT);

        // Convert it into a jME3 scene
        Node jmeRoot = (Node) FbxNode.createScene(fbxRoot);

        // Fix the name (will probably be set to something like "-node")
        jmeRoot.setName(sceneName + "-scene");

        return jmeRoot;
    }
Updates world transforms and bind poses for the FBX scene graph.
jme3-plugins/src/fbx/java/com/jme3/scene/plugins/fbx/FbxLoader.java