hold on a sec, some times then i stand by a wall and i move rapidly, i can see wuts on the other side o.O
I know, it depends where the aim is...
The fog of war is the combinations of this effect...
If you want to know more about this, go to the Bot Games and type in console: wireframe
thats the point. the fog of war consists of many triangles which are in fact 3d objects but they are arranged in only 2 dimensions and therefore look like 2d objects.
the same method is used to display the players, weapons and particle effects.