PackedVaryings vert(Attributes input)
{
    Varyings output = (Varyings)0;
    output = BuildVaryings(input);
    PackedVaryings packedOutput = (PackedVaryings)0;
    packedOutput = PackVaryings(output);
    return packedOutput;
}

half4 frag(PackedVaryings packedInput) : SV_TARGET
{
    Varyings unpacked = UnpackVaryings(packedInput);
    UNITY_SETUP_INSTANCE_ID(unpacked);
    UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(unpacked);
    SurfaceDescription surfaceDescription = BuildSurfaceDescription(unpacked);

    #if _ALPHATEST_ON
        half alpha = surfaceDescription.Alpha;
        clip(alpha - surfaceDescription.AlphaClipThreshold);
    #elif _SURFACE_TYPE_TRANSPARENT
        half alpha = surfaceDescription.Alpha;
    #else
        half alpha = 1;
    #endif

    half4 color = half4(surfaceDescription.BaseColor, alpha);
    return color;
}