Green screen technology seemed to have greatly advanced in the last decade but always varies from film to film and from TV show to TV show (Don't you HATE when you notice the background is a green screen?). I have 2 questions:
1. What in post-production determines a green screen effect to come out PERFECT or flawed? The budget? The equipment used to film? The technology used for CGI and such? Specific companies or countries that do it better?
2. If the film's story take places in early 1990s NYC, since the landscape and smog has changed so much since then, how to bring that back to life? Taking in consideration that I don't want footage from that period since is very hard to match a today's footage. What are the best options?