Prototyping new outfits and mods is much faster when you don't have to wait for server sync.
Since a true mod doesn't exist, players use several "pseudo-offline" methods to achieve the same result: 3dxchat offline mod
To understand the offline mod, one must first understand the friction inherent in the online experience of 3DXChat. By definition, an MMO is unpredictable. Interaction with other players can be rewarding, but it is equally capable of being frustrating, toxic, or simply disappointing. Players must navigate social hierarchies, deal with rejection, and conform to the unwritten rules of the community. Prototyping new outfits and mods is much faster