Need help with Unlit Vertex Blend shader

I'm trying to create a shader that I can blend multiple diffuse maps with a vertex painter, but I want the maps to be unlit. I've been able to hack together this from some shaders off the internet, but I can't figure out how to change it to unlit without breaking it.

I know next to nothing about shader creation.

Here is what I have, any help would be HUGELY appreciated.

-Sky

Code (csharp):

1.  
2. Shader "Unlit Blend"
3. {
4.     properties {
5.  
6.         _Splat1 ("Diffuse 01 (R)", 2D) = "white"{}
7.         _Splat2 ("Diffuse 02 (G)", 2D) = "white"{}
8.         _Splat3 ("Diffuse 03 (B)", 2D) = "white"{}
9.         _Splat4 ("Diffuse 04 (A)", 2D) = "white"{}
10.     }
11.    
12.     subshader {
13.         Tags {"SplatCount" = "4" "RenderType" = "Opaque" }
14.        
15.         Pass {
16.         Lighting Off}
17.        
18.         CGPROGRAM
19.         #pragma surface surf Lambert vertex:vert
20.         #pragma target 3.0
21.        
22.        
23.         sampler2D _Splat1;
24.         sampler2D _Splat2;
25.         sampler2D _Splat3;
26.         sampler2D _Splat4;
27.    
28.        
29.         struct Input {
30.             float2 uv_Splat1;
31.             float2 uv_Splat2;
32.             float2 uv_Splat3;
33.             float2 uv_Splat4;
34.             float4 vertexColor;
35.         };
36.        
37.         void vert (inout appdata_full v, out Input o) {
38.             o.vertexColor = v.color;
39.         }
40.            
41.         void surf (Input IN, inout SurfaceOutput o) {
42.            
43.             float4 splat_control = IN.vertexColor;
44.             fixed3 albedo;
45.             float gloss;
46.             float2 uv1 = IN.uv_Splat1;
47.             float2 uv2 = IN.uv_Splat2;
48.             float2 uv3 = IN.uv_Splat3;
49.             float2 uv4 = IN.uv_Splat4;
50.            
51.             float4 Splat1 = tex2D(_Splat1, uv1);
52.             float4 Splat2 = tex2D(_Splat2, uv2);
53.             float4 Splat3 = tex2D(_Splat3, uv3);
54.             float4 Splat4 = tex2D(_Splat4, uv4);
55.            
56.             albedo = Splat1.rgb * splat_control.r;
57.             albedo += Splat2.rgb * splat_control.g;
58.             albedo += Splat3.rgb * splat_control.b;
59.             albedo += Splat4.rgb * splat_control.a;
60.    
61.             o.Albedo = albedo;
62.            
63.  
64.         }
65.        
66.         ENDCG
67.     }
68.     Fallback "Diffuse"
69. }

 

Instead of

Code (csharp):

1.  o.Albedo = albedo;

use

Code (csharp):

1.  o.Emission = albedo;

but you shouldn't use a surface shader if you want no lighting.

 

Surface shaders only exist for incorporating lighting; "void surf" will have no place in what you want.