Unity has no built-in import pipeline for texture arrays in Unity 2020.1 and earlier versions. This is the relevant quote from their documentation: Currently in Unity texture arrays do not have an ...

Welcome to the Unity import and auto setup tool for Character Creator 3, Character Creator 4, iClone 7 and iClone 8 from Reallusion. This is a fully featured tool to take exports from CC/iClone and ...