Driftology/Assets/Scripts/Billboard.cs

using UnityEngine;
using UnityEngine.UI;

public class Billboard : MonoBehaviour
{
    private Transform cam;

    void Start()
    {
        Camera mainCam = Camera.main;

        if (mainCam != null)
        {
            cam = mainCam.transform;

            // Auto-assign Event Camera at runtime (fixes prefab reference issue)
            Canvas canvas = GetComponent<Canvas>();
            if (canvas != null)
            {
                canvas.worldCamera = mainCam;
            }
        }
    }

    void LateUpdate()
    {
        if (cam == null) return;

        transform.forward = cam.forward;
    }
}