Curio Cabinet

The Curio Cabinet is a feature implemented with The Forge.

Loading Backgrounds
Starting in the Forge, loading screens can be customized.

Portrait Backgrounds
Starting in The Forge, the portrait background of the player's character can be customized. Most of them have "Equip this this item to change your character's background portrait." in their description.

Profile Icons
Starting in The Forge, the player's profile icon can be customized.

Trivia

 * The Curio Cabinet is a great feature to see what other skins look like with each other, as it allows you to view skins that you have not obtained.
 * The Portrait rewarded to Beta Testers changes the outline a little bit