Hello,
I´ve read different explanations about upstage lighting that got me very confused. The first one says that upstage lighting comes from theater. Applying it to cinema it would be something like the first diagram below. The second explanation divides the scene differently. So when a DP talks about lighting upstage, which one of them are they refering to ?
By looking at the diagrams, the first one make it seems like upstage lighting it is using edge or backlight. And the second one anything between edge, sidelight and 3/4.