Photon Fusion is Photon's real-time multiplayer solution with state synchronization. Universal Friend List supports Fusion through both native and custom server implementations.

Photon Fusion Requirements

• Photon Fusion package installed
• A Photon Fusion App ID configured
• Unity 2021.3 or newer

Fusion setup is similar to PUN - download from the Asset Store and configure your App ID.

Native Fusion Friends

To use Fusion's native friends:

1. Set Backend Type to PhotonFusion
2. Set Use Native Implementation to true
3. Fusion's player ID will be used as the user identifier

Custom Server with Fusion

To use the custom server:

1. Set Backend Type to PhotonFusion
2. Set Use Native Implementation to false
3. Configure server URLs (see Server Setup)
4. The Fusion Player ID will be mapped to the server's user ID

See Scripts/Examples/NetworkConnections/SimplePhotonFusionConnection.cs:

using Fusion;
using Fusion.Sockets;
using UnityEngine;

public class SimplePhotonFusionConnection : MonoBehaviour, INetworkRunnerCallbacks
{
    private NetworkRunner _runner;

    public async void StartGame() {
        _runner = gameObject.AddComponent<NetworkRunner>();
        _runner.AddCallbacks(this);

        var startArgs = new StartGameArgs() {
            GameMode = GameMode.AutoHostOrClient,
            SessionName = "my_session"
        };

        await _runner.StartGame(startArgs);
    }

    public void OnConnectedToServer() {
        Debug.Log("Connected to Fusion server");
        // FriendManager will use Fusion player ID
    }
}