Complex sentence: The most notable non-musical film version was the 1934 French film, directed by Fritz Lang and starring Charles Boyer and Madeleine Ozeray, but Lang changed Molnar's pessimistic final scene into something more hopeful.
Split into simpler sentences: The most notable non-musical film version was the 1934 French film, directed by Fritz Lang and starring Charles Boyer and Madeleine Ozeray. Lang, however, changed Molnar's pessimistic final scene into something more hopeful.