Результаты поиска по запросу: *

The fact of the matter is that without sources, nothing can be done, unless it is already taken out into a config.

UserInfo and CharInfo packets in the core are what you need to edit. You can also add a List or Map or Set that holds all players which want to see the costumes and add a simple check in the packets, so that the visuals will only be sent to players in that List.