bubbles??

[thirddan]

looks like just a textured sphere to me...transparency and lots of reflection...

[lowkey]

Yep thirddan is right. I once created a similiar setup, having (pre-)animated geometry spat out by a particle instancer through what was intended to be an oxygen-pipe. Using this method, you can make the geometry behave dynamically and also (randomly) control the bubbles initial size and growth over time.

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