rain generator

[Aharon Rabinowitz]

Can you explain the effect you’re trying to do in more detail? What exactly do you want to have happen to the droplets of rain.

Thanks.

—————————————-
Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com
—————————————-
Creative Cow Master Series DVD
particleIllusion Fusion Volume 1
available @ http://www.pIllusionFusion.com

[D.g.gibbons]

the shot that I’m working on is an interior shot of someone driving a car with chroma green over the windows and I have been asked to replace the chroma with rain not unlike a thunderstorm. I have some background footage to se,then I used Borus’ rain plug-in to generate some very fake looking rain…and I was wondering how to make it look more natural and beleveable.

[Aharon Rabinowitz]

I’ve never used Boris, but AE (non-educational version, seperate installer on CD – Cycore Effects)) comes with a rain effect called CC Rain. And you can tweak it to get some nice rain. Also, there is a Lightning and Advanced Lightning effect that may be of help to you as well.

As far as settings go, a lot of it depends on the footage, so try compositing your BG and keyed footage, and either place a solid with the effect in between, or just place the CC rain effect directly on your BG footage. You may even want to add a directional blur to the rain (if on a seperate layer) do make it look more blurry.

Hope that helps.

—————————————-
Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com
—————————————-
Creative Cow Master Series DVD
particleIllusion Fusion Volume 1
available @ http://www.pIllusionFusion.com

[Bill Clotz]

I think you are probably talking about making the rain splash against the glass. For that you might want to try the CC Drizzle effect (not sure if thats the exact name). It makes little ripples all over the video. With some masking and 3d positioning, you could probably get it so that it looks like rain is falling on the window.

[Oakmozart]

You also might consider doing the effect manually…the “old-fashioned way.” Set up a greenscreen with some glass. Set up a rain bar, garden hose, or whatever water source you can get above the glass. (You’ll probably want to angle the glass to something akin to a windshield). Set up your camera behind the glass and turn on the water. It’ll take a bunch of experimentation, but you should be able to come up with a convincing “rain on the windshield” effect shot. Take that footage into your compositor, key out the chroma and comp it into your shot with your existing footage. You’ll probably want to get both “inside” and “outside” shots for the effect. You can also park a car in front of a greenscreen (car pointing toward the greenscreen), setup your camera inside the car, and shoot footage against the greenscreen while the water pours on your car. In this way, you could have the windshield wipers going to give it another great effect which would be easily keyable if shot/lit correctly.

I’ve done stuff like this before. It can be a real pain in the fanny, but the end-results are amazing and it often looks better than what can be achieved with plugins: more real.

Just a thought…provided I’m understanding what you wish to achieve correctly.

[Jon W.]

Or if you have access to a 3D app, setup a rain particle system, create a 3D windshield that matches the angle of the filmed windshield, use it as a collision object and render out the rain.