Black baseball cap shielding her eyes, Esther Abah in Lagos squints into the director's screen: "3, 2, 1... Action!" With a crew of student actors, makeup artists, light gaffers, sound engineers, and cameramen, the 30-year-old director is part of a film school project to sharpen the skills of a new generation of Nigerian filmmakers to help them appeal to international audiences. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES