Jet propulsion underwater - How to create bubbles I am working on a project right now again in which I am having a pretty futuristic looking submarine underwater, working with jet propulsion. I want the blast pipes to spit out blue light, which is no problem, but I will also need many many different sized crowded bubbles behind them.

Just to give you guys an idea what kind of look I am after:

https://st4.depositphotos.com/1813545/21750/i/1600/depositphotos_217500626-stock-photo-underwater-swimmer-sea-air-jet.jpg

https://previews.123rf.com/images/zefart/zefart1806/zefart180600754/102834854-air-bubbles-from-jacuzzi-jet-in-bubbly-blue-water-in-a-thermal-spa-pool-abstract-background.jpg

The end result is going to be a still image, so I have not  planned to animate anything.

And for all questions and further insight, the image I am working on. Still far from finished, but I want to collect some ideas on this:


Thanks for reading and for any ideas! :)
First, create a single bubble by making a sphere and making it a glass material, or however you want the bubble to look.

Add a particle system to the engine and under render, change the default halo to object, and under object, select your bubble


To make each of the bubbles a different size, change the scale randomness to something higher like 1.



To change the velocity of the bubbles, change the direction you want them to flow under the velocity tab.



There are many more settings you can change like turning gravity on and off. Good Luck!