Appearance sapp = new Appearance();
sapp.setColoringAttributes(new ColoringAttributes(SKY, ColoringAttributes.SHADE_FLAT));
sapp.setPolygonAttributes(C.noCull);
sapp.setTexture(tileManager.getTexture("data/images/misc/clouds.jpg"));
TransformGroup tg = new TransformGroup(new Transform3D(C.mkquat(1, 0, 0, Math.PI/2), new Vector3d(), 1.0));
tg.addChild(new Sphere(1f, Primitive.GENERATE_TEXTURE_COORDS, 100, sapp));
back.addChild(tg);
Background bg = new Background(back);
bg.setApplicationBounds(bounds);
addChild(bg);
}