I converted a car to SA. I also want to have all SA's features like the vehicle's dirt, headlights, SA's reflection... but the windscreen in not breakable, when i shoot bullets it doesn't break, it's like unbreakable glass. But if I crash the car into a wall the windscreen damages, but not breaks. Also if the car explodes the windsceen it's still there undamaged.
How would I make the windsceen breakable ?