Cartoon smoke puffs

I’ve sat on the sidelines long enough waiting to use Synfig. I’m really excited to mostly tween but have a question about puffs of smoke. I’ve seen two posts - Particle exporter and Particle snow and they might help after all…

I’ve drawn several puffs shapes. How can they be made to appear from a moving source and accumulate to large enough numbers they might seem like a drifting cloud?

You could set a group a group containing your source and the puff.
Then animate the group instead of the source alone.
The puff can still move relatively from the source (inside the group).

For to make them appear, grow maybe, and accumulate, you could play on their transparency.