Import a mesh - mesh won't show! [Solved]

hi! Welcome to the forums.

I suggest you reading this simple guide on how to properly import models. Those steps apply to any type of object you're working with, either cas or buy/mode. The amount of groups with their respective cut numbers MUST match exactly the original mesh. That's why i suggest exporting the original EA mesh and study how it is composed so that you can match your mesh perfectly.

As for hairs in particular, read this information. All hairs are composed by 3 groups, your mesh must have the equal amount (with their respective cut numbers)

As for the UV, you'll have to edit and move the UV to match EA's texture. You can read this complete guide on custom content creation. Press ctrl+f and paste this "Find the small plus sign in the upper right corner of the" and start reading from there.