Since I try to get some training in myself I started to mess with crowds a while ago. I also started experimenting with particles to find interesting VEX use-cases.
Here is what came out of that so far. I am not sure where this is going but I noticed that almost everything I did so far is visualized in modelling examples.
While that is indeed a good way to explain VEX it is also interesting to see what other options there are.
Edit:
So no gifs on mobile...



