More on the lowering of the mesh detail.... when an area gets crowded.... the server sends a message to EVERY client that is within the "crowding zone".... then every client who get that, lowers the detail of ALL the meshes down A GREAT DEAL....
Then, this will solve the lag.... there is no need to prevent players from entering a particular zone.... if we are talking about chamlot, the current system of GS zones is more than fine.... Once u start to limit players going into a "crowding" zone, and force existing players to exit, it will get so rediculous i don't even dare to think of the consequences....
And, if lowering down the detail of the mesh (and I emphazise again... by a lot..... maybe lower down the detail by 80-90%) doesn't help.... and u insist on limiting the number of players in a "crowding zone".... then, all I can say is that....
Your FC Server Cannot Handle The Load, Not The Player's Clients.