Added textures and materials and scene from half-life 2

Assets/occlusion-portals/script/Areaportal.cs

@@ -0,0 +1,53 @@
+using System.Collections;
+using System.Collections.Generic;
+using UdonSharp;
+using UnityEngine;
+using VRC.SDKBase;
+using VRC.Udon;
+
+public class Areaportal : UdonSharpBehaviour
+{
+    private OcclusionPortal portal;
+
+    private GameObject[] imposters;
+
+    void Start()
+    {
+        this.portal = this.GetComponent<OcclusionPortal>();
+        this.imposters = new GameObject[this.transform.childCount];
+
+        // Ёбаный рот этого UdonSharp
+        int i = 0;
+        foreach(Transform child in this.transform)
+        {
+            this.imposters[i++] = child.gameObject;
+            child.gameObject.SetActive(!this.portal.open);
+        }
+    }
+
+    public void SetPortalOpenState(bool state)
+    {
+        this.portal.open = state;
+
+        foreach(GameObject imposter in this.imposters)
+        {
+            imposter.SetActive(!state);
+        }
+    }
+
+    public override void OnPlayerTriggerEnter(VRCPlayerApi player)
+    {
+        if (player.IsValid() && player.isLocal)
+        {
+            this.SetPortalOpenState(true);
+        }
+    }
+
+    public override void OnPlayerTriggerExit(VRCPlayerApi player)
+    {
+        if (player.IsValid() && player.isLocal)
+        {
+            this.SetPortalOpenState(false);
+        }
+    }
+}