Hello everyone! First timer here. I stumbled on this forum while searching for the answers to this question, so I hope you can help!
I'm developing a short film that takes place in a bar at night with a window facing a busy street. Long story short, I'll need to shoot day for night to keep my location costs down. I'm familiar with the concept of exterior day for night, and I've seen many videos and articles telling me to block out the windows so as to block out the light for interior day for night. However, I can't seem to find anything about when you need to show that window and the exterior at night. I've narrowed it down to only a few shots with the window in frame, but there's no getting around that location's window.
I am having difficulty wrapping my head around how to have the shots showing the window to be a night-time street while shooting in the day time. The only thing that comes to mind is shooting with a green-screen to block the window, then go back at night and, without the actors present, shoot the same angles at night, then put it in place of the green-screen in post. If this is the only way, how would you light the green screen while also blocking the sunlight from spilling in?
Or is the dreaded rotoscope my only option? Create a matte for the window frame by frame, then adjust the levels and such to make it night, adding lights for headlights and tail lights. In which case, is there anything to be done for lighting to improve the quality or workflow of the rotoscope?