I think it does not matter, as long as the server's name is not the same. People will keep playing on your server in any case, as it holds their stats.
@fokkonaut try Graphics()->SetColor(0.3f,0.3f,0.3f,0.3f);
basically multiply the rgb values by the alpha value
that's also the reason why the debug ghost is not transparent in 0.7
19:23
however, the quads as triangles option should not influence this