Is this a SubD Loft?

[gatenbones (Hugh G)]

Hi guys,

Sorry to have to turn to the forum.

I’m wondering what tool you think I could use to get these wireframes into a shape like the screenshot?

I’m very interested in ‘soft cell’ shapes having come across this article.

Newly Discovered Shape Is a Tessellation Revelation

I imagine this is a Sub-D question — but I can’t get the loft tool to produce the desired results, as I need to loft all four faces?

Any suggestions or pointers hugely appreciated!

MDS-SK-001.3dm (2.7 MB)

[davidcockey]

I would not use SubD. SubD surfaces have zero curvature normal to edges and creases while the surfaces shown are curved at the edges.

One method to make these shape.

Simplify the curves.
PlanarSrf to create a planar surface.
ExtrudeSrfAlongCrv
MDS-SK-001 DC01.3dm (2.2 MB)

An alternative would be to split the curves and use ExtrudeCrvAlongCrv several times.

[gatenbones (Hugh G)]

@davidcockey
This is brilliant. Thank you so much for this.

[martinsiegrist]

Could also be a minimal surface…

Not perfect, would need some tweaks

[davidcockey]

How is a minimal surface created in Rhino without using Grasshopper?

[martinsiegrist]

Yeah, with Grasshopper.

[René_Corella]

@davidcockey

How is a minimal surface created in Rhino without using Grasshopper?

Not strictly minimal surface by definition, just a quick thought leveraging smooth command and CageEdit command with ‘symmetrical’ gumball deforms:

[martinsiegrist]

Using just Rhino

c-shape-patch.3dm (1.2 MB)

PS: Rhino 9 WIP…

[markintheozarks]

Martin, on your second picture down. It would be nice to see if the Wip(v9) could radius this. —-Mark

[inju]

Using just Rhino,
_SubDSweep2 + _Bridge

[martinsiegrist]

I tried some more starting with a network surface but could not get the fillets to work.