I wrote a script in python using cadquery to generate some shapes with hilbert curves. You can generate most of the objects I uploaded on here yourself by using the script.
You can adjust height, length, width, shellThickness, padding, filletSize and many other properties of the objects (units are based on mm I think)
This code isnt well optimized so expect it to take some time for high iterations (its still way faster than openscad for me).
The author marked this model as their own original creation.