I'm shooting a short soon and the director and I have agreed to obscure the time and place of the events happening. The whole story occurs in a very dark room until the last shot, the lead exits through a doorway which is to be blown out completely so as to show him exiting in to nothingness.
My thoughts are to put up a large silk outside the doorway and hit it with a lot of light and also black out the interior of the room. Either that or try to green screen it.
What would some of you do (or have done) in a situation like this?
Also, I don't have much of a budget to work with so for lights we're talking like a 1k and some impact octacools and maybe a 750w Lowell.