This shell design was created using my openscad model Customize-able Nautilus Shell (https://www.thingiverse.com/thing:3683735). The solid version of this shell is provided before the Voronoi effect was applied using this website https://www.voronator.com/. The STL of the shell with the Voronoi effect is 50% size of the original and tree supports were created using MeshMixer. If you take these 2 models into a slicer you'll have to move the supports in the X/Y directions to realign them with the shell. I have also provided my PursaSlicer project file that have them aligned.