Trouble with ZWrite

Hi,

I'm trying to create a simple shader that draws its geometry on top of everything else. Here's where I am.

Code (csharp):

1.  
2. Shader "Custom/Unlit ZtestAlways" {
3.     Properties {
4.         _MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
5.     }
6.     SubShader {
7.         Tags { "Queue"="Overlay" "IgnoreProjector"="True" "RenderType"="Transparent"}
8.         LOD 200
9.         ZTest Always
10.        
11.         CGPROGRAM
12.         #pragma surface surf Lambert
13.  
14.         sampler2D _MainTex;
15.  
16.         struct Input {
17.             float2 uv_MainTex;
18.         };
19.  
20.         void surf (Input IN, inout SurfaceOutput o) {
21.             half4 c = tex2D (_MainTex, IN.uv_MainTex);
22.             o.Albedo = c.rgb;
23.             o.Alpha = c.a;
24.         }
25.         ENDCG
26.     }
27.     FallBack "Diffuse"
28. }

I have it in the overlay queue, so the rest of the scene (terrain) should be rendered already, I would have though. ZTest is set to Always. The geometry using this shader still gets obscured by the landscape. Note that i've not put any Alpha blending in yet as I am just testing the ztest.

Must be something dead obvious, does anyone have any thoughts?

Thanks,

/Mike

 

Surely you want ZTest Off? Otherwise it will ZTest it and then occlude your geo by what's already in the ZBuffer?

 

Hehe, yes, you are correct - I was thinking that "Always" always passed the test.

Thanks

 

That doesn't exist.

No. Always does always pass the test.

Your shader is not "unlit". I can't tell you why it's failing, unless the landscape is also in the overlay queue and this mesh is behind the landscape.

 

Ah, my bad