I meant this type of hack tends to exist in every game that incorporates invisibility - not that it's all done the same way. Sorry for the misunderstanding. I

I meant this type of hack tends to exist in every game that incorporates invisibility - not that it's all done the same way. Sorry for the misunderstanding. I would imagine that the proper way of programming invisibility, is that no packets should be sent, until the server confirms the player can actually see invisible characters. As I understand it, too many of these checks would limit efficiency, though.