Car designers have every kind of software and virtual reality tool. But when they want to make sure a car's curves look just right, they rely on one of the world's oldest materials: clay. Every ...

Depending on who you ask, talking about car companies making clay models during the designing process will elicit either an "I'm sorry, what?" or "Well of course." Sculpting facsimiles of in-progress ...

WARREN, Mich. — Car designers have every kind of software and virtual reality tool. But when they want to make sure a car's curves look just right, they rely on one of the world's oldest materials: ...