Warner Bros. cast Greg Plitt as body of Dr. Manhattan in this spring’s blockbuster film, “The Watchmen.” Director, Zach Snyder, chose fitness model and actor Greg Plitt; the VFX crew took digitized Plitt in 3D and took high-definition video of the model against a grid with muscles relaxed, flexed and tensed. The crew then 3D-digitized Billy Crudup’s head and “frankensteined Billy’s head onto Greg’s body,” Travers says.