インタラクトしたらマテリアル変更して同期するやつ

GlobalMaterialChanger.cs

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

namespace TKMNY
{
    [UdonBehaviourSyncMode(BehaviourSyncMode.Manual)]
    public class GlobalMaterialChanger : UdonSharpBehaviour
    {
        [SerializeField] Renderer renderer;
        [SerializeField] int materialIndex = 0;
        [SerializeField] Material material;
        [SerializeField] GameObject onObject;
        [SerializeField] GameObject offObject;
        Material originalMaterial;
        Material[] materials;

        [UdonSynced, FieldChangeCallback(nameof(SyncedUseMaterial))]
        bool syncedUseMaterial = false;

        public bool SyncedUseMaterial
        {
            get => syncedUseMaterial;
            set
            {
                syncedUseMaterial = value;
                materials[materialIndex] = syncedUseMaterial ? material : originalMaterial;
                renderer.materials = materials;
                offObject.SetActive(!syncedUseMaterial);
                onObject.SetActive(syncedUseMaterial);
            }
        }

        void Start()
        {
            materials = renderer.materials;
            if (materialIndex < 0 || materialIndex >= materials.Length)
            {
                Debug.LogError("Material Indexが不正です");
                gameObject.SetActive(false);
            }

            originalMaterial = materials[materialIndex];
            renderer.materials = materials;

            if (Networking.IsOwner(gameObject))
            {
                offObject.SetActive(true);
                onObject.SetActive(false);
            }
        }

        public override void Interact()
        {
            Networking.SetOwner(Networking.LocalPlayer, gameObject);
            SyncedUseMaterial = !SyncedUseMaterial;
            RequestSerialization();
        }

        void OnDestroy()
        {
            if (originalMaterial != null)
            {
                Destroy(originalMaterial);
            }
        }
    }
}