Creating & flattening polyhedra

What is the quickest way to create regular and irregular polyhedra in Rhino. I seem to recall there used to be a plugin for this?

What is the best way to flatten polyhedra (as for papercraft)?

Thanks!

Found my answer: Is there a good method/script/plugin to create foldable cutouts? - Rhino / Rhino for Mac - McNeel Forum

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A simple polyhedron can be unrolled with the unroll surface command. No need for a plugin

Rhinoceros Help - UnrollSrf | Rhino 3-D modeling (mcneel.com)