Make object and everything behind it invisible

Unity Engine
1

I want to make an object invivisble and that blocks vision for things behind it.
The purpose for this is for AR.
For example i want to place eyes that follow the user on a statue. When i am behind the statue i dont want the eyes to be visible through the statue.
I am quite new to shaders and wonder how this can be done.
Thank you for any advice or tips

2

You want a depth only shader.

Shader "Custom/Depth Only"
{
  SubShader {
    Pass {
      ColorMask 0
      ZWrite On
      Cull Off
      CGPROGRAM
      #pragma vertex vert
      #pragma fragment frag
      #include "UnityCG.cginc"

      float4 vert (float4 vertex : POSITION) : SV_POSITION { return UnityObjectToClipPos(vertex); }
      void frag() {}
      ENDCG
    }
  }
}
3

I hadnt had a chance to test it until to day. It worked somewhat.
It doesnt block everything. It seems to work while in scene but not when i build it to my phone.

In the picture there is a cube infront and behind the object with the shader.

5420436--551085--Noblock.jpg
5420436--551085--Noblock.jpg720×1512 281 KB

4

NeverMind I got it working.
I changed the render queue and then it worked. (Pic) 1
How it looks (pic2)
Thank you very much for your help Bgolus.

5420604--551121--render q.PNG

5420604--551124--block.jpg
5420604--551124--block.jpg720×1512 178 KB

5

Hey, I hope you guys might help me, Im using this shader, but in the build, Where it should be transparent Im seing all black, any ideas? Thanks in advance