A8MaxBlend

Shader "xdegtyarev/Alpha8MaxBlended"
{
    Properties
    {
        _MainTex ("Alpha8", 2D) = "white" {}
    }

    SubShader
    {
        Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
        ZWrite Off
        Lighting Off
        Cull Off
        Fog { Mode Off }
        Blend SrcAlpha DstAlpha
        BlendOp Max

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma fragmentoption ARB_precision_hint_fastest
            #include "UnityCG.cginc"

            sampler2D _MainTex;
            float4 _MainTex_ST;

            struct vertDataIn
            {
                float4 vertex : POSITION;
                float2 texcoord : TEXCOORD0;
            };

            struct vertDataOut
            {
                float4 vertex : POSITION;
                float2 texcoord : TEXCOORD0;
            };

            vertDataOut vert(vertDataIn v)
            {
                vertDataOut o;
                o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);
                o.texcoord = TRANSFORM_TEX(v.texcoord,_MainTex);
                return o;
            }

            fixed4 frag(vertDataOut i) : COLOR
            {
                fixed4 col = half4(0,0,0,1) * tex2D(_MainTex, i.texcoord).a;
                return col;
            }
            ENDCG
        }
    }
}