Finally fixed pink materials lol

Optimised particle and vehicle textures
Removed large textures and deleted unused objects
Gaz now only holds 3 passengers for better gameplay (other seats are left empty)
Changed projectile to be more balanced with Humvee

Added smoke grenade
Added vignette to Arbalet screen
Fixed 'projectiles getting stuck on right door' bug
Made glass reflection more subtle
Lowered flare intensity

Created a new item.