How do I model creases and organic shapes in rhino and grasshopper?

Hi Guys!

I wondered if anyone knows any Grasshopper plugins or rhino commands that can make these organic shapes and forms? What is a good way to approach making forms like this? I could cage edit or sub D a basic geometry but I wonder if it will give me enough control over the forms to do something as complicated as this. How do I mimic the grooves and creases in some of these photos?

I am a student at Academy of Art University and these questions are purely for my own learning and practice.

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Natalie Tai

I might start here: What math behind such seashells?

And also look at the Pufferfish plug-in from @Michael_Pryor -

And this publication may help:

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