Emissive Blended Decal

Hey All,

I've been trying to get an emissive blended decal with a texture to define the emissive map, color and intensity settings working.

I've gotten it working so far in the sense that the decal now accepts an emissive map, emits light and sets intensity and color properly. My problem now is that I've lost the z-fighting fix and transparency of the shader I based this on. The original BlendedDecal is from the BootCamp demo I believe. Thanks in advance all!

I'm not using the standard shader as a cutout because of z-fighting and my target is WebGL.

 Shader "Custom/EmissiveBlendedDecal"
 {
     Properties
     {
         _Color ("Tint", Color) = (1,1,1,1)
         _MainTex ("Texture", 2D) = "white" {}
         _Emissive("Emissive", 2D) = "black" {}
         _EmissiveColor("EmissiveColor", Color) = (1,1,1,1)
         _EmissiveIntensity("EmissiveIntensity", Range(0,10) ) = 0.5
     }
     
     SubShader
     {
         Lighting On
         ZTest LEqual
         ZWrite Off
         Tags { "Queue" = "Transparent" }
         LOD 250
         Pass
         {
             Alphatest Greater 0
             Blend SrcAlpha OneMinusSrcAlpha
             Offset -1, -1
             SetTexture [_MainTex]
             {
                 ConstantColor[_Color]
                 Combine texture * constant
             }
         }
 
         CGPROGRAM
         #pragma surface surf MobileBlinnPhong exclude_path:prepass nolightmap halfasview
 
         inline fixed4 LightingMobileBlinnPhong(SurfaceOutput s, fixed3 lightDir, fixed3 halfDir, fixed atten)
         {
             fixed4 c;
             c.rgb = (s.Albedo * _LightColor0.rgb + _LightColor0.rgb) * (atten*2);
             c.a = 0.0;
             return c;
         }
 
         sampler2D _MainTex;
         sampler2D _Emissive;
         float4 _EmissiveColor;
         float _EmissiveIntensity;
 
         struct Input 
         {
             float2 uv_MainTex;
             float2 uv_Emissive;
         };
  
         void surf(Input IN, inout SurfaceOutput o) 
         {
             fixed4 tex = tex2D(_MainTex, IN.uv_MainTex);
             o.Albedo = tex.rgb;
             o.Gloss = tex.a;
             o.Alpha = tex.a;
         
             float4 Tex2D1=tex2D(_Emissive,(IN.uv_Emissive.xyxy).xy);
             float4 Multiply0=Tex2D1 * _EmissiveColor;
             float4 Multiply2=Multiply0 * _EmissiveIntensity.xxxx;
         
             o.Emission = Multiply2;
         }
         
         ENDCG
     }
     FallBack "Custom/BlendedDecal"
 }

Edit: I wrote another shader based on the decal example in the manual, here is the result posted below if anyone else is looking for a setup like I was.

Edit 2: Added a toggle for emission so it can be toggled via script.

 Shader "Custom/EmissiveDecal" 
 {
   Properties 
   {
     _MainTex ("Base (RGB)", 2D) = "white" {}
     _Emissive("Emissive", 2D) = "black" {}
     _EmissiveColor("EmissiveColor", Color) = (1,1,1,1)
     _EmissiveIntensity("EmissiveIntensity", Range(0,10) ) = 0.5
     [Toggle(EMISSION)]
     _ToggleEmission ("Emission", Float) = 0
   }
 
   SubShader 
   {
     Tags 
     { 
         "RenderType"="Opaque" 
         "Queue"="Geometry+1" 
         "ForceNoShadowCasting"="True"
     }
     LOD 200
     Offset -1, -1
     
     CGPROGRAM
     #pragma surface surf Lambert decal:blend
     #pragma shader_feature EMISSION
     
     sampler2D _MainTex;
     sampler2D _Emissive;
     float4 _EmissiveColor;
     float _EmissiveIntensity;
 
     struct Input 
     {
         float2 uv_MainTex;
         float2 uv_Emissive;
     };
 
     void surf (Input IN, inout SurfaceOutput o) 
     {
         half4 c = tex2D (_MainTex, IN.uv_MainTex);
         o.Albedo = c.rgb;
         o.Alpha = c.a;
 
         #ifdef EMISSION
         
         float4 Tex2D1=tex2D(_Emissive,(IN.uv_Emissive.xyxy).xy);
         float4 Multiply0=Tex2D1 * _EmissiveColor;
         float4 Multiply2=Multiply0 * _EmissiveIntensity.xxxx;
     
         o.Emission = Multiply2;
 
         #endif
     }
     ENDCG
     }
 }