This is an updated version of creating fog around units. The principle is still the same, but the method is TOTALLY different.
This uses the beta object that has 3x3 LOS. Using this, and coupling that with a couple of computer players, it is possible to create the same effect that I created before, but without any noises, flashing green boxes or anything. Just simple 3x3 LOS.
In case you worried about it, I left the ground bare so you can see exactly how effective this technique is.