Making proof of concept a real world tool.
This setup on Orbolt store:
Air is added only where it's needed basing on sdf of main fluid.
No bounding box needed.
One can control thickness of air shell, amount of air particles, limit air to specific regions etc.
Also done some extra steps to proper detect droplets with this approach.
HDR comes from openfootage.net
Done with standard Houdini Flip tools.