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Help with Fog

Posted: Sat, 18th Apr 2009, 8:29am

Post 1 of 4

10 Zen

Force: 1600 | Joined: 7th May 2006 | Posts: 15

VisionLab User VideoWrap User FXhome Movie Maker

Gold Member

I'm having a heck of a time wrapping my head around this for some reason.

The fog in my scene moves with the camera which pans right to left. How do I get the fog to stay put and look like it's part of the scene instead of panning with the camera?
Posted: Sat, 18th Apr 2009, 4:19pm

Post 2 of 4

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

Without motion tracking there's not a good way to lock it in quickly and easily, but here's how I would approach it:

Using a rectangular emitter for the particles, (assuming you are using a particle effect for the fog, and not stock footage) make the emitter quite a lot wider than the frame. You will probably have to adjust some other settings as well, to keep the fog as thick as it was previously. Then, at the start of the pan, move the emitter so that just the far right end of it is in frame, then go to the end of the pan, and move the emitter so just the left end is in frame. From there, you will just have to tweak the width of the emitter until the speed matches.
Posted: Sun, 26th Apr 2009, 7:19pm

Post 3 of 4

10 Zen

Force: 1600 | Joined: 7th May 2006 | Posts: 15

VisionLab User VideoWrap User FXhome Movie Maker

Gold Member

Thanks for the reply Axe. I appreciate it.

I tried your advice and there was some improvement, but not enough to pass off the effect. It was hard for me 'cause I never really imagined an effect being applied to the camera. I always thought of it being applied to the scene. I did get a tiny bit closer placing the emitter wider than the frame as you suggested, then animating a mask but by and large the effect still moves with the camera.

I tried track motion in Vegas and still couldn't do it. It is just an incredibly difficult (and time consuming) effect to pull off, and I don't have a deep enough skill set in VisionLab. I'm gonna 86 it for my current project but I'll come back to it when I have more time to experiment.

Thanks again.
Posted: Sun, 26th Apr 2009, 7:26pm

Post 4 of 4

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

VisionLab User VideoWrap User PhotoKey 5 Pro User MuzzlePlug User PowerPlug User PhotoKey 3 Plug-in User FXhome Movie Maker FXpreset Maker MacOS User

SuperUser

I'd be interested in giving it a try to see what I can come up with. If you have a place to upload the video clip to, PM me if that would be ok.