Hi guys! Thanks a lot for your tips! Inspired by this thread and Josh Clos article (https://www.joshclos.com/procedural-rain-system) I tried to replicate the effect .
I didn't understand why the drops have to stick around the center (due to wrangler in popnet) so I made a group w/ random points from POP Replicate and used wrangler and POP Interact to pull them appart and stop them after a certain age.
Then used them to compute droplets sliding on surface.
For puddle, instead of sin() on impact geo, I used a ripple solver, think the render is better for not so much more calculation.
You can see the system in action w/ another model:
Hope you enjoy!