All the needed information about the Custom Avatar are here.
The Custom Avatar is the Avatar that is defined by the Creator for his Experience. It has the linked-Asset look and Attributes. It can be set and edited in the Global Parameters window.
HOW IT WORKS
Experiences with Custom Avatar enabled have a single Avatar that is chosen, which means that as this is an Asset that is the Avatar, its Attributes are known in advance. As for each OBJECT, the ASSETAttributes define each values maximum. Then, the Custom Avatar parameters can be tweaked.
✨ Tip: Place your mouse on a Parameter name to have a tooltip describing what it does!