Unity4, add Unlit texture on top of Shader?

Hello!

I have this shader here, and it works well but i can't think of any way to make the "_EmissionTex" not affected by lighting.

I need the Emission part to be added on top of everything independent of light, like a "Unlit Decal".
Is this possible?

Thanks!

Code (CSharp):

1. Shader "Lino_Edit" {
2.     Properties {
3.         _Color ("Color", Color) = (1,1,1,1)
4.         _MainTex ("Albedo (RGB)", 2D) = "white" {}
5.         _EmissionTex ("Emission (RGB)", 2D) = "white" {}
6.         _EmissionIntensity ("Emission intensity", Range(0,5) ) = 1
7.         _EmissionVisibility ("Emission visibility", Range(0,1) ) = 1
8.         _EmissionColor ("Emission Color", Color) = (1,1,1,1)
9.         _Saturation ("Saturation", Range(0,1) ) = 1
10.         _Cubemap ("Cubemap", CUBE) = "" {}
11.         _CubemapIntensity ("Cubemap Intensity", Range(0,1) ) = 1
12.        // _Lightmap ("Lightmap (RGB)", 2D) = "grey" {}
13.     }
14.     SubShader {
15.         Tags { "RenderType"="Opaque" }
16.         LOD 200
17.        
18.        
19.         CGPROGRAM
20.         #pragma surface surf Lambert
21.        
22.  
23.  
24.  
25.         sampler2D _MainTex;
26.         sampler2D _Lightmap;
27.         samplerCUBE _Cubemap;
28.         fixed _CubemapIntensity;
29.        
30.         sampler2D _EmissionTex;
31.         fixed _EmissionIntensity;
32.         fixed _EmissionVisibility;
33.         float4 _Color;
34.         float4 _EmissionColor;
35.  
36.         struct Input {
37.             float2 uv_MainTex;
38.             float3 worldRefl;
39.         };
40.  
41.         void surf (Input IN, inout SurfaceOutput o ) {
42.        
43.        
44.        
45.             half4 c = tex2D (_MainTex, IN.uv_MainTex);
46.             fixed4 x = tex2D (_MainTex, IN.uv_MainTex) * _EmissionIntensity;
47.            
48.              c.rgb += texCUBE( _Cubemap, IN.worldRefl ) * _CubemapIntensity ;
49.            
50.              c.rgb =lerp(c.rgb,x, Luminance(tex2D (_EmissionTex, IN.uv_MainTex).rgb)* _EmissionVisibility );
51.            
52.  
53.             o.Albedo = c.rgb * _Color;
54.        
55.         }
56.        
57.  
58.         ENDCG
59.        
60.  
61.        
62.     }
63.     FallBack "Diffuse"
64. }
65.  

 

Albedo means the color of the surface. Albedo is always affected by the light.

What you should do instead is write to the emission channel:

Code (CSharp):

1. fixed emissionMask = Luminance(tex2D (_EmissionTex, IN.uv_MainTex).rgb);
2.  
3. o.Albedo = tex2D (_MainTex, IN.uv_MainTex) * _Color * (1-emissionMask);
4.  
5. o.Emission = tex2D (_MainTex, IN.uv_MainTex) * _EmissionIntensity * emissionMask;
6.  
7. o.Emission += texCUBE( _Cubemap, IN.worldRefl ) * _CubemapIntensity;