As the hero rides into the sunset, the screen 'fades to black'. [=the image gradually changes until the screen is completely black]
His voice 'faded' off into a whisper. = His voice 'faded' to a whisper.
We watched the ship gradually 'fade' from view as it sailed away.
(..) or we ruIe. No, ma'am. Then it's time. Catch a falling star And put it in your pocket Never let it fade away You wouIdn't happen to be running away, wouId you? What? Dressed Iike this? No. I'm going to a baII. Good. Get in. (..)2001 The Princess Diaries