Overlay Opaque shader

Hello. im wanting a shader that is an opaque object and overlays all of the objects in the scene.
what do i need to add in my shader. (i know i have to change the render type but is that it or i have to do more

Code (csharp):

1. Shader "Custom/Axis" {
2.     Properties {
3.       _MainTex ("Texture", 2D) = "white" {}
4.       _ColorTint ("Tint", Color) = (1.0, 0.6, 0.6, 1.0)
5.     }
6.     SubShader {
7.       Tags { "RenderType" = "Opaque" }
8.       CGPROGRAM
9.       #pragma surface surf Lambert finalcolor:mycolor
10.       struct Input {
11.           float2 uv_MainTex;
12.       };
13.       fixed4 _ColorTint;
14.       void mycolor (Input IN, SurfaceOutput o, inout fixed4 color)
15.       {
16.           color *= _ColorTint;
17.       }
18.       sampler2D _MainTex;
19.       void surf (Input IN, inout SurfaceOutput o) {
20.            o.Albedo = tex2D (_MainTex, IN.uv_MainTex).rgb;
21.       }
22.       ENDCG
23.     }
24.     Fallback "Diffuse"
25.   }

any help would be appreciated

 

bump

 

I'm not sure if the following works with surface shaders, but you could try it.

Render the shader last by placing in it in a later render queue:

You might also want to disable the depth buffer so that the world does not intersect the object being rendered:

 

Thanks