Few modern origamists are as prolific and inventive as Jeremy Shafer – he seems to be creating new models constantly, and most importantly, his designs are fun to fold:

This is his Pyramid Tessellation field – each molecule has pre-creases that have easy landmarks, meaning you could expand this field in any direction as far as you have patience for.

This version is a 4×4 field of 16 separate square-based pyramids – a lovely thing in itself but when you start playing with it it starts to do wonderfully weird things.

Using just the existing creases, the model flexes diagonally and also horizontally/vertically. When you flex it diagonally it turns in on itself and COLLAPSES down to a hexagonal stack – this initially broke my brain until I noticed the pre-creasing actually formed pyramidal faces that are equilateral triangles – the collapse then is just one state it can be arranged into.

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