folded face/ lettering
What started out as a simple 'thank you' poster for a friend working at a phonebook company quickly escalated into an entire typeface. It was easy enough-- using the standard sized pages and limiting it to merely folding and cutting to make each letter. Once that was completed, it was vectored into something a bit flatter and more readable.
'Folded Face' is featured in a book on typeface design by LST Publishing House.