This is a cube-within-a-cube ornament, created with an OpenSCAD script.

Creality

CR-10S

Yes

Yes

.25 mm

15%

Printed on the tip of a vertex with support from the build plate only.

This relies on the OpenSCAD hull() function to generate the cylinders with rounded ends. I had originally tried to create them by a union() with cylinders and spheres but the math for properly rotating the cylinders got unwieldy.

The model can be modified for whatever polyhedron you like. Two arrays need to be initialized: points contains the [x,y,z] coordinates of each vertex, and graph contains pairs of the indices of array points that are interconnected.