The archived Japanese instruction wants to unfold the paper entirely, and then ... what? I'm stumped.
The unicorn from the film itself wasn't "true" origami, being a prop consisting of several pieces glued together, but it really popularized the idea of an origami unicorn and a number of the current designs were prompted by it.
This came from Ridley Scott, not Philip K. Dick.
I am impressed that Scott was so subtle about this for so long. It would have been a short-term boost to hit us over the head with it, as in The Sixth Sense. But being coy about it helped to make the movie a true classic.
On the other hand, the book says Deckard is a human.
So it depends on whether you prefer Ridley’s version or the original book’s version, but it wasn’t supposed to ambiguous.
I actually was unaware that this warranted a website. When I was young, I had one origami book. I completed it to about 40%; wasn't too bad but was far away from being really good. Origami is quite an art. These days I tend to watch youtube videos more than look at oldschool books but I loved that old handbook. Never folded a unicorn though.
https://johnmontroll.com/books/dragons-and-other-fantastic-c...
On the final page it has a link to the "How to fold from a single sheet"
I'm a bit disappointed they couldn't incorporate the horn, but had to glue it on
Not even the next linked 3.