I have a great problem!
I'm working on a no-budget short film. This will be my first real job, and also is my dissertation.
Given that we study the theory, I have nothing in my hands about practice except for what I have learned on my own, thanks to this community too.
After this introduction, I ask for help on something I'm not able to do, but it's really essential for my project: I need to create a "brain" of smoke / ink.
Something like this , or this , or this so a good quality of a smoke/ink that during the movie, moving, forming, takes the form of a brain, like this (not revealing it, but a smoke/ink form)
Well, Gigi, this is what happens when someone promises more than what they are currently capable of. I don't want to rag on you or bring you down, but just take this as a lesson for the next project. Remember to under-promise and over deliver.
Now, as for a few techniques: You can take your own footage of black ink in water, and the bring them in and try to composite it to look "brainlike." This would take multiple layers and a lot of time to do (as well as a lot of effort and trial and error). Use the liquefy tool or the puppet tool to get the footage to sit correctly in a brain shape.