https://www.racedepartment.com/threads/hd-breakable-windshield-for-rbr.160731/

This file is include 
Breakable Windshield (original)

Unbreakable Windshield
ver0
ver1 
ver2

ver0 is original for assetto corsa.
https://www.racedepartment.com/downloads/hd-windshield-damage.10965/

Copy the dds file to the texture folder.