Animated bubbles
Created in standard PFlow max 2017
Direction is set using gravity and a trajectory line.
Birth from the object (mesh), you can set your object and change the settings as you like.
The archive contains an alembic (*ABC) file for animation of 600 frames.
Modifiers are imposed on top so that the geometry is displayed correctly on the render.
If you plan to render PF, then I recommend write a cache disk, this speeds up the work.
Default/vray/octane renders switch material in PFlow node or change to alembic geometry
if you have any questions / problem - write to me