Only some Voronoi cells get generated

[HS_Kim]

You could use mesh and surface morph method from 2d geometries. And there are other topics that are similar to yours by resolving the same problem with slightly different method not using 2d…

Voronoi 3D - Loft component does not create all the surfaces

Instead of using Loft, I use Ruled Surface and unifying face normal directions of the results… [Canvas at 21;21;29] shell_re.gh (104.6 KB) In case if I want some thickness and smoothness, then I would go with mesh(with weaverbird)… [Canvas at 21;38;50] shell_reV2.gh (108.3 KB)

voronoi_brep_surface_re.gh (111.0 KB)