In A2, players at long distances are rendered sunk partially into the surface to simulate being hidden by grass and surface features. It looks a little odd at first, like a bug, but really is more realistic than a body laying fully exposed on a hard looking surface 250m away. At close ranges, it doesn't happen, the figure is just laying amongst the grass.
I haven't a clue how this is accomplished, but maybe something like that? A player sinks into the surface if it's deemed soft enough?