Mostly a reply to @AndyG but also for all you in future who might be experimenting. Here are some particle functions I got from Autodesk trainers in the past. There are lots of text files in the zip with function ideas that may be of use to the community at large.
Yes, these were published on fxguide.com years ago. I had customized some of the turbulence functions to be more parametric. I guess it’s time that I do another round of particle tutorials. Here are some ideas:
So heres one; some dust falling. Scenario, drawing chalk on a board, small flutters of dust fall as the chalk draws on the board. Need gravity, turbulence, animating stop and start of the particles generation, animating size of particles. (This was my experimenting today you see)