I can shoot through marble!!
I am just so special that in one of the dungeon tactical fields I can stand behind a marble column and shoot arrows and spells directly through the marble column at enemies that should be obstructed. It looks very epic and picturesque. It looks very wrong. The same is true of open field tactical maps with those rolling hills. Arrows go straight through the hills. Open field shots should be drawn as a ballistic arc not a straight line. Short range shots should be horizontal and obstacles to range attacks should matter. If you are at all into enforcing range increments, the two graphic styles could be used to show two effectiveness ranges.