Hi,
Can a music minor respond?
From a writing perspective, the difference is blurred some. If you are an instinctive writer, you simply follow your inner movie and it's all about how well, and how fast you can articulate/translate what is in your inner movie. Later, when you are done writing it, you might want to embellish it a bit, and that would be an ornament for me.
How's this done in music? Funny you should ask ... I did a film version of the first act of TOSCA for a directing in Opera class (instructor was Peter Mark - Virginia Opera Emeritus these days) and it went really well, and the film version I had was well written and it had some very nice details ... for example ... look at the score of the aria coming up in that piece ... and you will find that in all the instruments, there is in the middle along with his tears, a single violin, that goes ... plunk, plunk, plunk, plunk, downwards like 5 or 6 times, and that was it ... and this crazy mind person, decided that was a close up of a tear falling ... hitting the beard, falling and hitting what he was wearing, then falling again and hitting his legs, and then to the ground ... to get absorbed by the straw on it.
I could say that ... this particular instrument was added to add a subtle moment to the music, that most of us will never find or hear ... but ... there it was.
My version was a film version with the sets on film on a scrim in the backstage ... and the singing done up front, but moments like this one could be super-imposed easily enough while he is singing, and the camera would follow that tear, even if we had to fake it some, since no one can see a tear from the 3rd row, and we do not have to place him in the front!
The opening was even better ... men on horses, going towards the church, and all of the filming is done from ground level, so all you see is the horses' feet, until the last moments when the camera can pan out and we see him taken to the jail!
Peter's comment? ... "... just about solved every problem that opera has ever had in a stage!" .... and I said ..."let's do it!" ... sadly, it never happened. But I think it would have been a massive show and would blow out a lot of opera traditions that can better be worked on film, instead of the "make believe" sets.
PS: I have not tried Turandot in the same spot ... but I don't know how I can top Renata Tebaldi dwelling with Birgit Nillson. And Leinsdorf directing of course!