Smoke / Cryogenic Effect

[Edrick]

I can't really think of a way to explain it but when you're on the bridge of a ship and it's been damaged or something dislodged from a space station and a burst of white vapor appears or is a steady stream like the ship is venting something.

This is usually done in movies, how do they do it?

[cpf]

Cryogenic CO2 for the jets?

[chausman]

In movies, its probably CGI. If not, Cryogeniflex or This Thread may be useful for information on a Co2 jet (which seems like a likely alternative. I don't think a fog machine would be powerful enough.

[Edrick]

Yeah they wouldn't use a fog machine. CG is possible but is less likely for some of the bigger stuff (at least with a bigger budget).

I'm trying to learn how to do it as a practical effect. It seems like it could be dangerous? To do it with CO2 since a lot of times it's a constant burst?

I'd like to learn more about creating effects like that and using electronic solinoids(sp).

[chausman]

It seems like it could be dangerous?

Oh yeah! But thats why its fun! (Joking)

I suppose something like what we were talking about http://www.controlbooth.com/showthread.php?t=24898 no, that wouldn't work... (unless you were to use a bunch of baby powder(I wouldn't want to clean that up))

[Edrick]

I'm gonna contact a few SFX guys around that I know hopefully they'll have some insight. I'd like to start practicing making setups like if you were on a ship or something.

[ruinexplorer]

My guess is liquid nitrogen.