Omniscient Narrator

Do people in movies—not the actors, but the characters themselves—somehow know the cameras are there? That we’re watching them, laughing at them, empathizing with them? What about subjects of books—are they aware that an omniscient narrator knows everything they do, think, feel? How about figures in paintings? When we observe a portrait in a museum, is some part of the original subject aware that we’re observing them, judging them? Even after they die, they can’t escape our gaze. Though maybe they’re the lucky ones, having achieved what few of us have—the ability to live on eternally, by any means possible.