We've all been thinking about bubbles recently, so maybe that's one of the reasons I decided to use them to depict the family in my new painting 'Momento Mori' (see my blog 20/11/20)
I 've been trying to experiment with their translucency and its very difficult. Sometimes the bubbles look more like coloured footballs even though they show parts of my Morris Minor behind.
In fact, the most successful are were I've painted a quick smudge and smear to create the illusion of a bubble rather than a long detailed analysis.
Perhaps thats the answer ?