Cars in films/TV programmes. Even if they are supposed to be auld bangers in the roughest part of town, every car you see has a gleaming windscreen. Not just cars either. You never see that windscreen-wiper arch you see on EVERY car/bus/van/wagon out there when it's on telly/cinema. Realism is ranked highly with the production team but one thing they have little or no control over are the vehicles. They clearly have to rent them all from the stock of vehicles the production company has (to represent the time or country the drama is set in) or just rented from Avis or someone if it's a contemporary thing and all such companies pride themselves on renting out CLEAN vehicles. The production team NEVER think, 'Oh, let's add some realism to the scene by making the car/van/wagon look as though they all look in reality.'