Anchor3d: "default" | "front-center" | "front-top" | "front-bottom" | "front-left" | "front-right" | "front-top-left" | "front-top-right" | "front-bottom-left" | "front-bottom-right" | "middle-center" | "middle-top" | "middle-bottom" | "middle-left" | "middle-right" | "middle-top-left" | "middle-top-right" | "middle-bottom-left" | "middle-bottom-right" | "back-center" | "back-top" | "back-bottom" | "back-left" | "back-right" | "back-top-left" | "back-top-right" | "back-bottom-left" | "back-bottom-right"