遊戲中常常需要讓某個物件始終朝向攝像機，在世界UI上使用的比較廣泛，例如對話方塊或者血條。

常見的實現方法有兩種。

一種是直接改變rotation：

using UnityEngine;
using System.Collections;

[ExecuteInEditMode]
public class BillboardRotation : MonoBehaviour {

	public Camera cameraLook;
	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
		if (cameraLook == null) {
			cameraLook = Camera.main;
		}
		transform.rotation = cameraLook.transform.rotation;
	}
}
 

using UnityEngine;
using System.Collections;

[ExecuteInEditMode]
public class BillboardPosition : MonoBehaviour {
	public Camera cameraLook;
	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
		if (cameraLook == null) {
			cameraLook = Camera.main;
		}
		transform.LookAt (cameraLook.transform.position);
	}
}