This mod adds animal masks from GTA Online.
BeardLib is required.
List of masks:
Brown/Grey Bear Gray/Tabby Cat Earth/Striped Dino Brown/White Eagle Brown/Red Fox Chestnut/Pinto Horse Brown/White Owl Penguin Black and Tan/Gray Pug Black/Gray Raccoon Black/Grey Wolf
"How to Install Custom Maps, Weapons etc (Beardlib + BLT + Mod_overrides)" tutorial by Master Indigo Extract archive content to "mod_overrides". Mod is compressed using LZM2 - 7zip or most recent archiver required to unpack files.