private static Shape drawLWS (String filename) {
Lw3dLoader loader = new Lw3dLoader();
try {
BranchGroup bg = loader.load(filename).getSceneGroup();
bg.setCapability(BranchGroup.ALLOW_CHILDREN_READ);
bg.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
bg.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
bg.setCapability(BranchGroup.ALLOW_DETACH);