diff --git a/Assets/Portal/Runtime/Portal.cs b/Assets/Portal/Runtime/Portal.cs
index 907a45b..58ad331 100644
--- a/Assets/Portal/Runtime/Portal.cs
+++ b/Assets/Portal/Runtime/Portal.cs
@@ -13,6 +13,8 @@ namespace EscapeRoomEngine.Portal.Runtime
     public class Portal : DoorState
     {
         public static readonly Matrix4x4 HalfRotation = Matrix4x4.Rotate(Quaternion.Euler(0, 180, 0));
+
+        private static int _portalCounter;
         
         /// <summary>
         /// The portal that is connected with this one.
@@ -31,10 +33,14 @@ namespace EscapeRoomEngine.Portal.Runtime
         /// Whether this portal is connected is determined by whether the reference to its linked portal is set.
         /// </summary>
         internal bool Connected => linkedPortal != null;
+        [ShowNativeProperty] internal int PortalNumber { get; private set; }
+
         internal readonly List<PortalDriver> closePortalDrivers = new();
 
         protected virtual void Awake()
         {
+            PortalNumber = _portalCounter++;
+            
             DoorEvent += (_, type) =>
             {
                 // ReSharper disable once SwitchStatementMissingSomeEnumCasesNoDefault