Combining two shaders

Hi,

I am trying to combine a custom shader with the default Bumped Specular shader. My custom shader is similar to this example code from the documentation:

Code (CSharp):

1. Shader "Examples/2 Alpha Blended Textures" {
2.     Properties {
3.         _MainTex ("Base (RGB)", 2D) = "white" {}
4.         _BlendTex ("Alpha Blended (RGBA) ", 2D) = "white" {}
5.     }
6.     SubShader {
7.         Pass {
8.             // Apply base texture
9.             SetTexture [_MainTex] {
10.                 combine texture
11.             }
12.             // Blend in the alpha texture using the lerp operator
13.             SetTexture [_BlendTex] {
14.                 combine texture lerp (texture) previous
15.             }
16.         }
17.     }
18. }

My goal with this is to take a base color like so:

Then overlay a texture on top of it that contains transparency:

To create a new texture that combines both of them:


The code above can get me to this point, but I want to combine this functionality with the Bumped Specular shader. Any suggestions would be greatly appreciated.

Thanks!

 

You need to learn cg/surface shaders, it is something like the below.

col1 = tex2d(your main texture, uv);
col2 = tex2d(your blend texture, uv);
s.Albedo = lerp(col1, col2, 1.0 - col2.a);
s.normal = do your normal as it is done in the bumpmap shader
s.Alpha = col1.a + col2.a;