Hello Stefan
Thank you for all the info
and the Minimal Surf - file -
I invite you to download the folder from the link,
so you can see the results obtained-

As you will see, I do not expect to have a refund
Surface math ..,
Which I will never get with a modeling
Low Poly,
The exercise aims to explore the potential
of Elephant , for the achievement
of surfaces very similar to their mathematical parents

have a nice day
al