((do they call it 'dilution' on the destwo version of SAI? i have the official version so let me know if the wording needs changing because i know the destwo one has slightly different names for stuff))
I can't stress enough that this isn't a 'how to draw x' type tutorial - there are so many ways to make bubbles and this is just the way I do it. Properly realistic bubbles involve more shadows and brighter highlights and reflection and...yeah! There's no better reference than reality.
But if you want to make basic semirealistic underwater bubbles, and you like how these ones look, by all means feel free to use this and I hope it's of help to you!
If you want to see how these bubbles look as part of a bigger picture, I drew a hell of a lot of them in this:
All feedback is appreciated! Let me know what you thought of this sort-of-kinda-tutorial. :3
**EDIT**
Wow, I really wasn't expecting such a great reception to this! ._. Thank you, everyone who faved and commented on this. Seriously.