I examine the horizon at distance 2-3 kilometers round the position. I can see that has to be hidden by texture of a surface of the earth. All tops of hills the transparent. All constructions and rocks in air. Equipment and the people wishing to keep the hidden situation are visible. It should not depend on settings of range of a portrayal of objects and textures. It should not be transparent as constructions and rocks are not transparent.
All this is broken in a game. You think - you it isn't visible. But it can be not so.
On the majority of servers, control intentionally for economy of load of the server and the client.