Smart showed transparent body panels for its forfour model line at the Geneva motor show.

Called "cool & cosy" and "hot & tropic", two concept cars were designed to show how plastic body panels in their natural transparent or translucent state can be used.

The translucent panels allow the engine and radiator to be seen under the bonnet, while tyres and suspensions are visible under the wings. Window mechanisms can also be seen through the translucent door panels.