Last reviewed 30 Apr 2026
Applies to
UdonSharp VRChat Worlds SDK World UI
Difficulty Beginner

Zone Welcome Message

Show a local message when a player enters a trigger zone.

Category: UI Systems

UdonSharp Script

using UdonSharp;
using UnityEngine;
using TMPro;
using VRC.SDKBase;
using VRC.Udon;

public class ZoneWelcomeMessage : UdonSharpBehaviour
{
    public TextMeshProUGUI messageText;
    [TextArea] public string welcomeMessage = "Welcome to this area!";
    public float showSeconds = 3f;

    private float hideAt;

    private void Update()
    {
        if (messageText == null) return;
        if (messageText.gameObject.activeSelf && Time.time >= hideAt)
        {
            messageText.gameObject.SetActive(false);
        }
    }

    public override void OnPlayerTriggerEnter(VRCPlayerApi player)
    {
        if (messageText == null || !player.isLocal) return;

        messageText.text = welcomeMessage;
        messageText.gameObject.SetActive(true);
        hideAt = Time.time + showSeconds;
    }
}

License:

Setup

  1. Add script to trigger volume object.
  2. Set collider Is Trigger.
  3. Assign messageText from your world UI canvas.

Extra Tips and Troubleshooting

Tips and Tricks

  • Keep messages short and action-oriented.
  • Use different trigger zones for onboarding flow in large worlds.

Troubleshooting

  • If no message appears, confirm local player trigger event and UI reference are valid.

Related Content

Prefab Setup Notes

Import the prefab or script into a throwaway test scene before adding it to a live world. Confirm inspector references, ownership behavior, sync, triggers, UI hooks, and audio or object links before moving it into the production scene.

Testing Checklist

  • Test once as a local player and again with a second client or late joiner if the behavior can affect more than one player.
  • Confirm ownership, sync, trigger zones, UI references, and audio or object references are assigned intentionally.
  • Check desktop and VR interaction distance so players can actually use the feature in context.
  • Keep a backup of the scene before changing prefabs, UdonBehaviours, or serialized references.

Related Pages

Official References