It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

Add your avatar to the game.

Now you need to change the avatar, go to(or create) mod directory Mods (%AppData%/../LocalLow/AtomTeam/Atom/) and change or add your files.

PNG - avatar image
ASSET - avatar configuration file, appearance style.

All file names must be in format [ava1-ava39]

Mod source:

Also option to add via bundle using Unity (it is important to set FILE_SYSTEM_LOAD = false if using bundle)