Ark style teleport / spawn ui. Adding spawns to ui.

Hi, I'm creating a respawn screen with a image of the map and I would like to show spawn locations on a UI.

when the player places a spawn point (sleeping bag, bed), I would like it to show up in the UI and allow interaction for a spawn script.

I tried adding a ui button in a world space canvas to a game object and set to a new layer (PlayerSpawnPoint), so the main cam doesn't render it and adding a UI cam to render that layer from top down perspective.

I've added the render texture to the UI and the spawn buttons are showing as they should but I cant interact with them.

I've tried using a raycast and a 2nd raycast but nothing seems to work

Code (CSharp):

1. void Update ()
2.     {
3.         if (Input.GetMouseButtonDown (0)) {
4.            
5.             Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
6.             RaycastHit hit;
7.             // do we hit our portal plane?
8.             if (Physics.Raycast (ray, out hit, MainDistance, MainLayer)) {
9.                
10.                 Debug.Log (hit.collider.gameObject);
11.  
12.  
13.                 // convert the hit texture coordinates into camera coordinates
14.                 Ray portalRay = portalCamera.ViewportPointToRay (hit.textureCoord);
15.                 RaycastHit portalHit;
16.                 // test these camera coordinates in another raycast test
17.                 if (Physics.Raycast (portalRay, out portalHit, Distance, Layer)) {
18.                    
19.                     Debug.Log (portalHit.collider.gameObject);
20.                 }
21.             }
22.         }
23.     }

Maybe someone can think of a better way to show newly placed spawn points to a UI and allow for some kind of button or interaction to call a script.

Thanx Alot Jim