The ring's algorithm is basically made of 3 parts: 
1. The first part is about generating the outside and inside breps. They can have any kind of shape, in this case is just a simple loft between 9 rectangles that are scaled and rotated in different planes according to a point attractor.
2. The second part uses Kangaroo Physics Engine to obtain the input points and curves for the wrapping geometry in David Stasiuk's "marching cubes" algorithm ( https://www.grasshopper3d.com/profiles/blogs/marching-cubes-curve-wrapping-more-metaballs ).
3. The last part is the "marching cubes" algorithm which is fed by the set of curves, points and breps from the previous stages.
STAGE 1
STAGE 2 - the plane at the base keeps the shape closed, without perforations.
STAGE 3
THE [marching cubes] RING FROM DIFFERENT ANGLES
INTERIOR VIEWS
THE EXTERIOR SURFACE AND THE FINAL GEOMETRY OVERLAPPED
DIFFERENT VARIATIONS OF THE SAME ALGORITHM
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