Cant get Alpha Channel to Work with Custom Shader

[topgun128]

Hey Guys

Im pretty new to Unity and still learning, so be gentle.
Im currenty working through the brilliant hex map tutorial by Catlike Coding.

In part 1 we create our custom shader.
Since Im planning to do something slightly different with my game I want to introduce transparency to my shader.

After trying to learn more about shaders with this tutorial, I have reduced my shader to this which still does the job:

Shader "Custom/VertexColors" {
    SubShader{
        Tags{ "RenderType" = "Opaque" }

        CGPROGRAM
        #pragma surface surf Standard fullforwardshadows
        #pragma target 3.0

        struct Input {
            float4 color : COLOR;
        };

        void surf(Input IN, inout SurfaceOutputStandard o)
        {
            o.Albedo = IN.color;
        }
        ENDCG
    }
    FallBack "Diffuse"
}

I now want to add transparency to my shader.
As I understand it if I want to change all cells to just be 50% transparent this should work:

Shader "Custom/VertexColors" {
    SubShader{
        Tags{ "RenderType" = "Transparent" }

        CGPROGRAM
        #pragma surface surf Standard fullforwardshadows
        #pragma target 3.0

        struct Input {
            float4 color : COLOR;
        };

        void surf(Input IN, inout SurfaceOutputStandard o)
        {
            o.Albedo = IN.color;
            o.Alpha = 0.5;
        }
        ENDCG
    }
    FallBack "Diffuse"
}

But of course, this doesnt change anything.
I have been working on this for hours now.
Really looking forward to your help.

Lucas

[Namey5]

Shader “Custom/VertexColors” {
SubShader{
Tags{ “RenderType” = “Transparent” }

         CGPROGRAM
         #pragma surface surf Standard fullforwardshadows alpha
         #pragma target 3.0
 
         struct Input {
             float4 color : COLOR;
         };
 
         void surf(Input IN, inout SurfaceOutputStandard o)
         {
             o.Albedo = IN.color;
             o.Alpha = 0.5;
         }
         ENDCG
     }
     FallBack "Diffuse"
 }

You have to actually enable blending for transparency to happen in a shader. In your case, because you are using a surface shader, you can simply add the ‘alpha’ keyword to the surface declaration.