I've modelled a 3D "Cattle-Grid"(shown in the pic below) at the pit-lane entry and exits points for a themed track I'm creating, and I've noticed when viewing the replay that every time the bike runs over the 3D Cattle-Grids the screen view breaks up very badly just as if there is bad interference in a TV screen signal.
For ref: I have the metal bars of the actual Cattle-Grid currently defined as "TRKKERB" to try and get a rumble sound as the bike passes over the grids.
Additionally: Is there a way to implement custom sounds for object surfaces such as this so that I can implement the correct sound to play when a bike runs over this Cattle-Grid?
(https://farm5.staticflickr.com/4492/36838494044_1fa35bdced_b.jpg) (https://flic.kr/p/Y8hUR3)