Origami by Michał Kosmulski | Models

Triangle Patch Tessellation

2026-04-16T01:22:52+02:00

A tessellation of large and small triangles on a hex grid. Named after the badges used to identify prisoners in Nazi concentration camps. This fold, in light yellow hand-made paper is a tribute to the Warsaw Ghetto Uprising, started on April 19th, 1943.

Easter Hen

2026-04-11T14:04:42+02:00

This hen by Pierre-Yves Gallard is a relatively simple model, but nonetheless has an interesting folding sequence that I enjoyed following.

Solid Cube

2026-04-11T13:41:41+02:00

Usually when you make a cube in modular origami (or single-sheet folding as well), the cube is empty inside, with just the walls, edges, or vertices made of paper. In this design, the interior is also filled with paper, making it very heavy compared to other origami cubes. Of course, this is not quite true: there are still large air-filled volumes between the units, but compared to other designs, it is indeed a solid cube.

It is made from A2 tiles of the Building Block Unit (BBU) but can also be folded from the Business Card Cube Unit. It is just a stack of those units connected one on top of the other, with the last one upside down to lock the whole row in place. The number of units needed to make a cube depends on the thickness of the paper and how well you squash the units together. Therefore, it is not fixed, another interesting property of this design. I needed 58 for this particular fold. From stacks of different height you can make cuboids other than the cube (the top face is always a square, though).

The existence of this design relies on paper having a non-zero thickness: a precise CP with zero-thickness paper collapses into a flat square. Alternatively, one could imagine a CP consisting of two parallel mountain folds separated my a small gap in place of each single fold.

An alternative “tennis ball coloring” where the units from each of the two perpendicular directions are two different colors gives an interesting result.

Simple Bunnies

2026-03-31T16:25:35+02:00

Two variants of Pierre-Yves Gallard’s Simple Bunny design, folded in a workshop with the designer during the 2025 Origami Deutschland convention. Happy Easter!

Diatryma Terror Bird

2026-02-21T10:43:58+01:00

This is a 2026 refold of my oldest origami design that I’m aware of, the Diatryma terror bird. I designed it some time in the early 1990s, and for a long time it was my only custom design. It’s a pretty simple one, starting from a square cut in half diagonally, with two rabbit ears that produce the legs. It’s not very detailed, so it could represent an ostrich as well (the head should be larger for the actual terror bird).

Hedgehog Star III - Comparison of Plain and Color Change Folds

2026-02-21T09:55:02+01:00

February 24th 2026, marks the 4th anniversary of Russia’s full-scale invasion of Ukraine. I’m happy that most Poles support Ukraine in this tough struggle, knowing this is not only the morally right thing to do, but also an investment into our own security. Regardless of where you live, you can help, too. This is possible both on a personal level, as the recent successful drives to collect money for power generators and heating for the bomb-struck cities show, and through the military assistance organized by governments.

The models shown here are two folds of Hedgehog Star III. The red and white one (Polish national colors) is made from a single kind of sheet: duo-color Kami. The blue and yellow one (Ukrainian national colors) is made from two kinds of metallic paper, each same color on both sides.

Hex Twist Star (CFW 111)

2026-02-18T22:21:39+01:00

A star by Shuzo Fujimoto. The rays are as in CFW 110, but the center is Petals (CFW 85) rather than Windmill (CFW 84).

2026

2026-02-12T08:15:53+01:00

A somewhat late New Year’s model for 2026.

Napkin Heart II (standing form)

2026-02-12T07:55:34+01:00

This is Napkin Heart II, shaped so that it can stand on its own (if folded from a stiff enough napkin, or paper as is the case here). It can also act as an envelope of sorts.

This design is very simple, so I suspected it may have been independently designed by others before, and indeed Michel Grand pointed out to me that it is almost identical to Hiroshi Kumasaka’s Heart Card aka Heart 2. The only difference is the layer ordering of the paper behind the heart proper.

Star Tato F

2026-02-10T15:15:17+01:00

A Star Tato variant derived from variant A by folding the loose flaps along the same lines as in variant B but shaping them into 3D cones as in variant D.