Black Textures? (Insurgency: Sandstorm)

Black texture of some stones, rocks and shrubs are very conspicuous and spoil the visual perception. It's either a bug with lighting in Unreal Engine 4 either developed visual moles are made miserable moments in the simulation cards. Maybe there's something in the config file to fix that would be removed is likely a bug light or shadows? Settings many have tried from minimal to ultra, not what helps...

Some screens and this a lot everywhere: