This model prints flat, then folds along the edges to form a rhombic dodecahedron. The inner sides snap together, as shown in the video below, to hold the shape without additional connectors. If you change filament mid-print, you will have a polyhedron with a different color intererior/exterior. PETG filament is recommended as it will fold repeatedly without breaking much better than PLA. Print at 0.2 mm layer height, and enjoy!
The author marked this model as their own original creation.