Skybox shader

Hi. I want to write a shader that works the same as the skyboxshader. Full emission, isn't affected by light or fog. How do I do that? I tried to copy from the skyboxshader but it didn't work at all

 

This is how I make the "skybox". In fact, the sky is not necessary as a box You could make it as any shape you want. My example is a sphere.

The most important part of code are "CULL FRONT", "out float depthEPTH" and "depth = 1". That will make all object looking like always inside the skybox.


(fog is enabled in the scene too)

Code (csharp):

1. Shader "BlueSky/Skybox"
2. {
3.     Properties
4.     {
5.         color_map   ("color_map", 2D) = "white" {}
6.     }
7.     SubShader
8.     {
9.         Pass
10.         {
11.             CULL FRONT
12. CGPROGRAM //--------------
13.  
14. #pragma vertex   vertex_shader
15. #pragma fragment fragment_shader
16.  
17. struct a2v
18. {
19.     float4 vertex   : POSITION;
20.     float4 texcoord : TEXCOORD0;
21. };
22.  
23. struct v2f
24. {
25.     float4 position : POSITION;
26.     float4 texcoord : TEXCOORD1;
27. };
28.  
29. v2f vertex_shader(a2v IN)
30. {
31.     v2f OUT;
32.    
33.     OUT.position = mul(glstate.matrix.mvp, IN.vertex);
34.     OUT.texcoord     = IN.texcoord;
35.     return OUT;
36. }
37.  
38. void fragment_shader(   v2f IN,
39.                         uniform sampler2D color_map,
40.                         out float4 col:COLOR,
41.                         out float depth:DEPTH )
42. {
43.     col.xyz = tex2D(color_map, IN.texcoord.xyz);
44.     col.w = 1;
45.     depth = 1;
46. }
47.  
48. ENDCG //--------------
49.         }  
50.     }
51. }

 

Thanks alot for all the effort! I'll try to implement the shadercode in my project.

 

Thanks Daniel, but terrain not visible throw skydome mesh with you shader. How made this?

 

Not work - 500/10/5/0 - terrain not vision