Hi Pim,
My vision for something like that might be completely different than yours. What is your target with that? What do you like to express or achieve? Where is this shown?
Some pointers:
-
You can use another Maxon Noise as Mask - source
-
Feather or Displacement would be my question
-
There is no Proximal Shader in Redshift; this might be more something about Vertex Values.
We will get so into a different theme, and I would think that should be in a new thread. Mixing follow-up questions that move in a different direction can be difficult to follow after a while, especially if the initial idea or question is mixed in from time to time.
Besides, perhaps explore Liquids now; when you asked the first question, I was not allowed to talk about it, but that would be the next level from my point of view
https://cineversity.maxon.net/en/series/cinema-4d-liquids?tutorial=01-cinema-4d-liquids-overview-of-liquids-objects-settings
Enjoy