I am using CS5, After Effects, Win 7. I have created an effect of someone sprinkling snow on a scene which loooks pretty good but I'd like the snow to fade to nothing over a period as it falls. I know I saw in another tutorial an option called something like dies or fades and a timespan selection. However, I cannot for the life of me find it. Can anyone help ?
Trapcode Particular has such parameters.
You will have to create a property map if you use Playground, which could be as trivial as a circle near the emitter that "imprints" a lifespan onto each particle. You will have to pre-compose the map. Otehrwise you might indeed try to look into otehr effects, though getting the snow to rest on anything will then be much more complicated...