In fact for this sort of thing i's very easy inside Vectary! Remember TopMod! :)

My French Documentation of Vectary! :)
https://moiscript.weebly.com/doc-vectary-vf.html

Vectary: Some Tools box an Radial Menus!
just a tore + extrude some faces + rotation :)

Astonished thing!

Spline (free & Pro)
https://spline.design
Works inside WebBrowsers
Can make animation
Export only in formats GLTF & Spline (free)

My first try :)
Click on the Green object ;) (zoom mouse wheel etc...) Rotate with the mouse for roller coastering! :)

Funny indeed! :)
(Import OBJ, STL, FBX, GLTF, Spline)




We can all edit but seems missing the fill of an erased face!

https://nodi3d.com/

Terrific for less 10€!!! You maust have an Ipad ! (Maybe a day on Android ? )
Seems pefect for paint Moi3D object! ;)

Hi Pilou

I own Procreate on the iPad Pro. But I could not try Procreate 5.2
yet. Because I need to update the IOS to at least 14.4 first, I'm still on 13.5.

And I think MOI will not be enough because you need a UV-MAP to paint
on 3D objects in Procreate 5.2.

On the iPad, the sculpting app "Forger" can create UV-Maps.
Or you can use Blender on the PC/MAC.

The App Nomad, which I love for 3D modeling on the iPad
unfortunately can't create UV maps yet.

Curves and Surfaces – Bartosz Ciechanowski
Interactive article explaining how curves and surfaces are modelled.

https://ciechanow.ski/curves-and-surfaces/

Excellent pedagogy!

Spline 3D I have made the French documentation! ;)
https://moiscript.weebly.com/documentation-spline.html

You can import any MOi Object (in OBJ format) by a simple Drag & Drop!
(Click & Zoom Rotate etc...)

Spline 3D : with a model by Maksim Borisov

3d fractal

Yep you have this one free online! ;)
https://hirnsohle.de/test/fractalLab/

Dang cool and real time!

Test with Spline!
So colors of Moi are directly exported! :) (just a Drag & Drop of the screen of Spline for import something! (obj format + Mtl)
Click ...