The photos on the chapel wall consist of François Truffaut's friends and idols, such as Jeanne Moreau, Oskar Werner, Jean Cocteau, Guillaume Apollinaire, Oscar Wilde and Henry James, the author of the story on which the film is based, as well as Maurice Jaubert, whose music is used in the film.
When asked about the message of this movie, François Truffaut said, "I am for the woman and against the man. As this century approaches its end, people are becoming more stupid and suicidal, and we must fight against this. The Green Room is not a fable, not a psychological picture. The moral is: One must deal with the living! This man has neglected life. Here we have a breakdown of the idea of survival."
One of several François Truffaut films of the 1970s to use (exclusively) music composed by Maurice Jaubert, who had died nearly 40 years earlier.
In an interview with L'Humanité-Dimanche magazine, François Truffaut asked, "Why not have the same range of feelings for the dead as for the living, the same aggressive or affectionate relationship?" and added that he wanted to film "what it would be like to show on screen a man who refuses to forget the dead." According to him, this movie is not the worshipping of death, but an extension of the love for the people that we have met and who are no longer alive, and the idea that they have a permanency. What matters is that Davenne refuses to forget, and this refusal is important for Truffaut.