[rudedog]

The sv_pure server option, when turned on, means that the server will send the client information about which files it is to use (and demanding that the client limit itself to only those files installed on the server) .. removing the ability to use custom models/skins/sounds etc while playing on that server if the server itself does not have those customisations.

The server requests checksum information about the .pk3 files being used by the client so that it can verify that the client is using the correct versions (i.e. not hacked ones).

The upshots of this are:

1) If you have custom .pk3 files, they will not be used when you are playing on a server with sv_pure set.

2) If you remove or alter your existing .pk3 files, you will not be able to join a server with sv_pure set.

3) If you edit or alter the Q3 binaries, you will not be able to join a server with sv_pure set.

The disadvatage (to you) of this setting is that you can't then use your cool new skins or sounds or HUD.

The big advantage is that you can be reasonably sure that nobody on the server is using spiked models or aimbots or anything else.