Zodiac - Behind the Scenes Featurette CGI

idk alot about special effects
so whats the diffrence between a blue screen and a green screen

There's no major difference. If you have a character with a green shirt then you won't want to use a green screen because the shirt will go invisible. Night time scenes often have blue in them so you'll want to use a green screen.

Wow, that is amazingly, seamless CGI work (I certainly never picked it in the film itself). Importantly, movies are just going back to where they were before 1965. *Then* location shooting was very rare, and almost everything was shot on soundstages and backlot sets, and painted backdrops and back projections were the norm. Now, after 40 years of more and more location work, we're back to every-increasing soundstage and backlot work, only now the backdrop painting and projections are all CGI.

you don't seem CGi because they sampled (like in the PoPmusic) every single element by very expansive laser to interface with their software, and to sell whole like an ability but they copied everything.

kinda spoils the 'magic' of the film

"spoils the magic"
Not for me. I kinda like that there is this much work that went into it, and so much attention to detail that I didn't even notice what they did. In my opinion what was achieved with a computer is more magical than if it was all real.

It's kind of ridiculous just how happy this made me.

I would have never guessed some of these shots were filled with effects. Good work.

Is it amazing? Hell yes, and so is their work for Benjamin Button. But what FX are made for? Hell no. A lot of these things could have been shot on location. Fincher could have achieved a similar look with post-production work.

Finally one realistic consideration!This kind of directors use electronic to come down frome their car-mobile. They Map all S. Francisco bay and later The Press declare that is one masterpiece of virtuosity in the cinematic technique...Bah They spent multimillionaire Budget, one great director gets consistency not from CGI but by ideas!