Vision display for replays

I think it is very important to see which part of the map is visible for which team in a replay. It makes clear why players move in a wrong direction.

My idea:

• Draw a blue grid on the ground for those parts of the map which is visible only for the blue team
• Draw a red grid on the ground for those parts of the map which is visible only for the red team
• Nothing should be drawn onto those parts which is visible for both teams

Why a grid? It is less disturbing than adding a bluish/reddish hue to the map. The grid only does a slight modification, but it is clearly visible. It should be drawn below the champions, only on the ground. The hole between grid lines could be big enough, like half of the size of a usual champion. The line can also blend slightly to the ground.

What do you think?