I've been working on a new personal project and it call's for bath foam. After a few days of wrecking my brain how to do it this is what i got. It does need a bit more specular maybe and a few tweaks like that, but what i really need help with is the way to get that shifting of colors in reflection that is so characteristic to bubble foam, like in the example image i've attached. Any idea how to do that? tnx!!