Here is a quote I just read about the making of the rain:
How were your digital rain elements accomplished?
MB: Well, we started working with rain that Robert shot in the studio. We did some very aggressive color corrections on it to get as close as possible to the comic book panels. Then we added lots of 3d particles and really layered it up. Our matchmove dept had done roto animation of Marv so we could have the particles hitting him and bouncing off.
I would bet on it that they used Lightwave 3d to render their particles. It's one of the programs the company that did the work (Hybride) uses mostly. See what you can find out there. If not...
for pretty basic rain (that doesn't look like Sin City) you could use a 3rd party plugin called Delirium (by DigiEffects). It has a rain effect built in.
You could try using Trapcode Particular and make your own particle and then mess around with the settings to change direction, shape speed etc. Make your particles in Illustrator.
Another stand alone product called "particleIllusion" could do the same thing. They even have particle sets already done and ready to download. You might find something similar there.
The latest Cinefx shows that Hybride used Digital Fusion to do the effect. Essentially, they keyed the actors and used them as the deflection objects, giving the rain some interactivity. Another layer of rain was added in front. Each are basic particle effects.
I believe particle illusion can do exactly the same thing within one interface, and if not, can definitely do the interactive layer and the rain plate layer separately, and you can comp them in after effects or EffectsLab from www.fxhome.com (I think).
After Effects might be able to do it on its own, but not sure.
Ya you're pretty much correct there..the particles though after further research were done in lightwave. I use particleillusion and I have to say it's not that bad.
yeah, the cycore effects rain is nice .. with the right blending and environment and careful shooting and such it can be quite convincing. ..only problem is that things dont get wet from it... a nice add on touch though when used lightly.
I've done rudimentary rain in AE's own particle playground, and that was after playing around with it for only a couple of minutes. I'm not saying it's convincing.
But we also built a rain grid and shot rain falling in front of a black sheet, and I use that as an overlay. Maybe next time it rains, shine a bright light at it and shoot it against a matte black backdrop. Can't beat real rain.