Octahedron (5 levels)

Folding instructions: Business Card Cube Module
This is the primary page for this model.
Paper: copy paper (business cards)
Type: business card origami, other modular polyhedron (implies: abstract modular, abstract, balls and polyhedra, geometric, mathematical object, modular balls and polyhedra, modular, multi-sheet, other polyhedra)
Author: Michał Kosmulski
Units used: Business Card Cube Module, by: traditional model
Unit count: 624
Colors: white
In albums: Modular ④ – huge number of units

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Just like the pyramid, this is a shell with an empty inside.