So couple days ago, I discovered a trick for faking larger foam bubbles by accident.
Simulation was simulated with Storm HydroFX and the air bubbles are just particles that are simply duplicated and modified from foam particles.
So the method I used was duplicating the foam particles, then reducing their amount with *Delete Geometry" node and adjusting with “Random Value” node in Geometry Nodes. After that, I scaled them larger than the others. Using the same foam material, I changed the color to match the sand or water and made it slightly darker, so it appears more transparent compared to the surrounding foam particle.
From a distance at medium close up amd further, it convincingly looks like larger air bubbles within the foam!
So this is a test render for my personal project
I spilled the setup on my X post, well the foam on that video is still not that great :
https://x.com/i/status/2034453442408890388