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It would probably be relatively easy to recreate the smoke in post production compared to trying to capture it agaist a green screen.
I would shoot the smokers smoking.
Yes, there are ways to simulate a little smoke, but it's difficult, and not always convincing.
It's difficult to key smoke from green (it basically acts as a diffusion.... painful blurrness), but if you have a camera movement on slowly evolving and accumulating smoke, you'll find it's even harder to get photo-real digital smoke than it is to color correct spill.
When people move (arm gestures, body movement of any kind) through smoke, it pushes the smoke around in an organic collision that is a bit of nasty when you try to reproduce it without a serious fluid simulator.
Some things to consider before you take out those cigarettes from the car.
AND DON'T FORGET... COMPOSITE! You don't have to get the people AND the smoke in a single pass. If the people are clean in one pass, and the smoke is clean in a separate pass, composite the two keying passes together to marry the results.
I agree it is impossible to recreate the smoke because it will be a lot of it. In fact, it`s not a smoke from the cigarette but from joint of "marihuana" which is circulating between 3 actors in the car, and it is very important for the story, I can`t take it out.
And I think it`s impossible to composite too. Any other solution?
Half and Half.
Key as much as possible, and introduce "filler" smoke when you need. You might want to shoot a little black box of smoke (although it'd be v.v. difficult to wrangle)
Thanks, but I am not sure yet. I am now testing with dvgarage filter, it is a little bit better but I don`t think it is gonna be convincing.
I know Cigarette smoke can be done nicely in Particular...just don't have it in front of me right now.
I don't like your chances of pulling a good enough key from either DV or HDV - too much fine detail is lost in both formats.
Any chance you could shoot the scene in a better format - perhaps use a camera with an SDI output and a computer that records uncompressed? Or shoot digi-beta/HDCAM?
Or the ultimate way - rent a low-level car trailer, tow the car around and shoot it for real.
Andrew's "Ultimate Way" is probably the best solution. Be sure to use prop marijuana.
There are plenty of easy-to-mount camera rigs for light cameras
I will shoot on DVCProHD. My budget is very, very small so I am thinking about shooting in cabriolet, for real, no green screen, only with sun light and easy-to-mount camera rigs. What do you say about that option?