Hi Dave thanks for the response.
There will be no fog in the shot. The image was a little stylised. Basically the scene will be a main character who walks and interacts with another (himself) in a dark room while surrounded by identical characters. The scene will have many varying shots where you will need to see the faces of some characters and not of others from different angles. I was thinking of filming the sequence with the main character first and then filming the same actor from the various angles to composite into the shots as the identical people standing around.
If the room didn’t need to be so dark I would do it all chroma key. I am just concerned I will get too much reflected light on the actor from the chroma key and it may be more work in post trying to remove the excess light spill.
What do you think?