Painting bubbles on walls can be done using a sheer paint that can only be seen in certain lighting, and adding a few white highlights creates a realistic effect. Paint whimsical bubbles on interior walls with helpful tips from a professional artist in this free video on painting techniques.
How to paint bubbles. The first thing to do is to find a reference for your bubbles for instance go online and google bubbles and there you have them. The thing about bubbles is that they are clear, they are shiny and they're iridescent is a good word for them. The next thing to do is to decide your bubble sizes and find some random circles. Let's make three bubbles. I am just going to very lightly draw the circle for the smallest bubble and then a next size up and a larger one. One I want to use is interference paints. You will only see them when the light hits them just correctly you see they are different refractions with light and in this little dish I just have some white tint and a little glazing liquid because bubbles are transparent and if I look at my photo reference I kind of just follow the idea that there is an outside white edge on probably at least two sides and then that can just be gently softened around, you have to think round and maybe use a sponge. They are clear so you want to be able to see through them. So that would be one bubble and then as it gets smaller you would probably want to use a smaller chisel brush and paint the last large just blocking in the bubble shape with white and transparencies and leave a lot of it the background color. Well we have blocked in the bubbles and now I'm going to add some interference paints having looked at my reference and seeing that there is blue, green and violet predominantly in the bubbles and sort of watching my reference just sort of apply it in the same fashion as I see it in the bubbles and it is keeping it fairly transparent because you want to be able to see through your bubbles and I'm using the interference rather than an iridescent paint because that way they will not always be iridescent. When the light hits them will be when you see the iridescent qualities. It looks like violet is the predominant color in the bubbles, with little bits of greens. These are very playful, they would be great in a nursery for instance and kind of soften the brush marks out. The final step would be to just strike in the refraction which is the white highlight that you would see and you have got some bubbles.