Square

Update: I was made aware of the fact that Ron Resch discovered this origami tessellation before Eric Gjerde. I have updated the list of designers accordingly.

This model somewhat reminds me of a hedgehog. It's basically a tessellation consisting of many small waterbomb bases.

Paper: 19.5cm square of stiff paper, 115gsm
Model: 11cm x 11cm x 1cm when pressed flat

I was really intrigued by this model, because of its 3-d finish. Apart from having seen faces and such formed from tessellations, I had really associated tessellations with being essentially flat. Another surprise was that you first have to fold spread hexagons, and that model then very easily transforms into the star puff.

Paper: 19.5cm square of transparent paper
Model: 4.1cm x 12.2cm x 0.8cm

Yesterday night I first tried the model on a triangle grid with 16 pleat divisions to get a feel for how to do the model. I then moved to transparent paper, and had this stupid idea of doing a triangle grid 64 pleat divisions instead. Hours later... this is the result. This is what robs my sleep!

Paper: 19.5cm square of transparent paper
Model: 15.3cm x 13.7cm

Guess what the newest addition to my small origami library is? Yes, indeed! Finally, there's a book on tessellations! I received the book yesterday, and have keenly explored it. And: it is fantastic. I'll look into making a video on some tessellation techniques in the future. Many thanks to Eric Gjerde for making such a fantastic book on an area that really needed a good book on it.

Paper: 19.5cm square of transparent paper
Model: 12.5cm x 12.5cm