Jekyll2026-07-27T12:27:51+02:00https://origami.kosmulski.org/feed.xmlOrigami by Michał KosmulskiThis site presents origami folded and/or designed by Michał Kosmulski. Currently, these are mostly tessellations, boxes, modulars and other geometric models. Apart from lots of model images, there are diagrams and blog posts related to origami.Michał KosmulskiPTO Convention 20262026-07-22T00:00:00+02:002026-07-22T00:00:00+02:00https://origami.kosmulski.org/blog/pto-convention-2026On July 16th-19th, I attended the yearly origami convention of the Polish Origami Association (PTO, Polskie Towarzystwo Origami) in Rogów, Poland. The special guest was Dáša Ševerová who presented a number of her designs, from the very simple but elegant Lonely Flower to the much more complex Colombian Sun fractal. We also enjoyed our time talking about many subjects, not just origami, and had lots of fun by a bonfire which some of us left after 4 a.m.

There were lots of workshops as well as some teaching during free folding. I had three scheduled workshops, including one on Fujimoto‘s star CFW 92 and Daffodil (CFW 97) that I taught for the first time. The latter is only mentioned in passing in a single sentence in one of Fujimoto’s books, and there isn’t even an image of the model anywhere, let alone any instructions. I was also able to put my hands on the Vietnamese Papyrus paper for the first time, thanks to Boryslav, a fellow folder from Ukraine. Thanks to Marta and her 3D printer, we all got nice paper cutters and fun origami-themed keychains, and as every year, the convention t-shirt was included in the package.

During the event, we celebrated the 20th anniversary of the association’s founding, and a special convention book was published, which I highly recommend. It includes 20 models by 20 different authors, including my Sol, as well as interesting stories and pictures from past conventions.

The topic of the folding competition was drawn from among the ideas suggested by the participants, and it ended up being “headgear.” Having worked on a few models representing volcanoes recently, I had the idea to make a Volcano Hat, which won the first place. I like how the popular vote appreciated the design’s absurdity.

Overall, the convention was lots of fun, and the location very calm and full of greenery, allowing us to fully focus on folding while also being easy to reach both by car and by train. The next one will take place during the third weekend of July 2027, but the place remains to be determined yet. Stay tuned.

]]>Michał KosmulskiCOrigami - an AI-based Origami Design Tool2026-07-02T00:00:00+02:002026-07-03T11:19:55+02:00https://origami.kosmulski.org/blog/corigami-ai-origami-designI’m very excited to announce a paper I have co-authored: COrigami: An AI Pipeline for Co-Designing Flat-Foldable Visually Recognisable Origami. It introduces COrigami, a first of its kind AI-based origami design tool, capable of generating origami crease patterns and simulating their folded look, including simple shaping, starting from a textual description.

The majority of the ML research was carried out by a team at Google DeepMind, led by Tom Zahavy, with me and a number of other origami designers working mostly as domain experts. Nonetheless, the general approach of first using an LLM for translating a textual description of the model into a stick figure and then using deterministic algorithms to generate a crease pattern, is exactly the same as I suggested on my blog in 2023. I’m proud to have been able to contribute a little to this unique project, and to work with a great team of experts from two seemingly very different fields.

The image shows the progressive design stages from natural language to physical paper model. The workflow transitions from semantic stick figure generation and automated box-pleated crease pattern layout, through simulation and folding, to aesthetic shaping — ultimately establishing a viable structural starting point for physical artistic execution by Brandon Wong.

]]>Michał KosmulskiRegistration for BOS Autumn Convention is Open2026-07-02T00:00:00+02:002026-07-02T00:00:00+02:00https://origami.kosmulski.org/blog/registration-bos-autumn-convention Nightingale Hall, University of Nottingham; image by mattbuck @ wikimedia commons; licensed under CC Attribution-Share Alike 3.0 Unported
Nightingale Hall, University of Nottingham; image by mattbuck @ wikimedia commons; licensed under CC Attribution-Share Alike 3.0 Unported

Registration is now open for the British Origami Society’s Autumn Convention in Nottingham. The convention will take place on September 11th-13th, 2026, and I will be a special guest along with Peter Croall. You can book your ticket as well as B&B from the registration page.

Let me know in comments if there are any models you would particularly like to fold with me during the workshops, or topics you would be especially happy to discuss!

]]>Michał KosmulskiOrigami Cranes above the entrance to Lomená Galerie in Olomouc2026-06-03T00:00:00+02:002026-06-03T00:00:00+02:00https://origami.kosmulski.org/blog/lomena-galerie-olomouc Entrance to Lomená Galerie in Olomouc, featuring origami cranes on a blue background

In Olomouc, Czech Republic, I recently stumbled upon Lomená Galerie (Broken Gallery), an art gallery located in a passage inside an old building. The entrance is currently decorted with two origami cranes on a blue background. The murals are exchanged periodically, and these cranes seem to have been added after October 2025, judging from the photos posted on the FB page. Unfortunately, I was not able to determine the author or the time the cranes were added.

]]>Michał KosmulskiSpecial Guest at BOS Autumn Convention in Nottingham2026-05-15T00:00:00+02:002026-05-15T00:00:00+02:00https://origami.kosmulski.org/blog/special-guest-bos-nottingham Nightingale Hall, University of Nottingham; image by mattbuck @ wikimedia commons; licensed under CC Attribution-Share Alike 3.0 Unported
Nightingale Hall, University of Nottingham; image by mattbuck @ wikimedia commons; licensed under CC Attribution-Share Alike 3.0 Unported

I’m happy to let you know that I will be a special guest at the British Origami Society’s Autumn Convention, along with Peter Croall. The convention will take place in Nottingham, UK, on September 11th-13th, 2026. Booking will open on July 1st. You can find all information about this origami meeting on the convention’s website.

Let me know in comments if you have any special wishes, for example models that you would particularly like to fold during workshops!

]]>Michał KosmulskiShuzo Fujimoto’s 103rd Birthday2025-10-25T00:00:00+02:002025-10-25T00:00:00+02:00https://origami.kosmulski.org/blog/shuzo-fujimoto-103rd-birthday Shuzo Fujimoto, portrait in three-quarter profile, Koichi Tateishi in the background. Picture by Robert Lang, taken on May 4th 2006.
Shuzo Fujimoto, portrait in three-quarter profile, Koichi Tateishi in the background. Picture by Robert Lang, taken on May 4th 2006.

October 27th, 2025, will mark the 103rd anniversary of Shuzo Fujimoto’s birth. On this occasion, I’m publishing this picture of Shuzo Fujimoto, taken by Robert Lang on May 4th, 2006, at Fujimoto’s home in Sasayama, Japan.

As a reminder, here are some interesting materials related to Fujimoto that were created for his 100th birth anniversary, 3 years ago, and afterwards:

Enjoy, and carry on the work of Shuzo Fujimoto.

]]>Michał KosmulskiPictures of Models folded by Shuzo Fujimoto from Roberto Morassi’s Collection2025-07-21T00:00:00+02:002025-07-21T00:00:00+02:00https://origami.kosmulski.org/blog/fujimoto-models-morassi-picturesIntroduction

In 2023, I received several dozen models folded by Shuzo Fujimoto’s hand from Roberto Morassi. So far, I have shown some of those models at origami conventions, but I want to make them available to a wider audience. In this post, I am publishing pictures of all those models. Some of them were new designs that I had not seen anywhere else, and which I had to assign new CFW numbers. Others I could match to models easily found in Fujimoto’s books. At least two helped me confirm my analysis of designs that were only mentioned briefly in the books, and required a great deal of reverse-engineering to reconstruct (Daffodil (CFW 97) and Hex Twist Star CFW 94). They also provided an interesting glimpse into Fujimoto’s design process and his folding method. His wildly inaccurate folding was one of the most striking surprises I found in those models and a fact I would never learn by looking at books and other printed publications alone.

Model images

Identifier Name Front Back Comments
01

CFW 144 Dahlia + CFW 424 + CFW 414
Model 01 from the collection of models folded by Fujimoto, front
Model 01 from the collection of models folded by Fujimoto, back
02

CFW 100 Daffodil + CFW 422 + CFW 414
Model 02 from the collection of models folded by Fujimoto, front
Model 02 from the collection of models folded by Fujimoto, back
03

CFW 13 Hydrangea basic form E
Model 03 from the collection of models folded by Fujimoto, front
Model 03 from the collection of models folded by Fujimoto, back
04

CFW 86 Thorn
Model 04 from the collection of models folded by Fujimoto, front
Model 04 from the collection of models folded by Fujimoto, back
05

CFW 122 + CFW 414
Model 05 from the collection of models folded by Fujimoto, front
Model 05 from the collection of models folded by Fujimoto, back
06

CFW 84 Windmill, or possibly CFW 81 (= CFW 84 + CFW 414)
Model 06 from the collection of models folded by Fujimoto, front
Model 06 from the collection of models folded by Fujimoto, back
07

CFW 97 Narcissus
Model 07 from the collection of models folded by Fujimoto, front
Model 07 from the collection of models folded by Fujimoto, back
08

CFW 121 Snowflake + CFW 414
Model 08 from the collection of models folded by Fujimoto, front
Model 08 from the collection of models folded by Fujimoto, back
09

CFW 89 Water Wheel
Model 09 from the collection of models folded by Fujimoto, front
Model 09 from the collection of models folded by Fujimoto, back
10

CFW 423
Model 10 from the collection of models folded by Fujimoto, front
Model 10 from the collection of models folded by Fujimoto, back
11

CFW 99 + CFW 414
Model 11 from the collection of models folded by Fujimoto, front
Model 11 from the collection of models folded by Fujimoto, back
12

CFW 425
Model 12 from the collection of models folded by Fujimoto, front
Model 12 from the collection of models folded by Fujimoto, back
13

CFW 101 Daffodil Variant + CFW 414
Model 13 from the collection of models folded by Fujimoto, front
Model 13 from the collection of models folded by Fujimoto, back
14

CFW 90 + CFW 414
Model 14 from the collection of models folded by Fujimoto, front
Model 14 from the collection of models folded by Fujimoto, back
15

CFW 87 Scissors + possibly CFW 414
Model 15 from the collection of models folded by Fujimoto, front
Model 15 from the collection of models folded by Fujimoto, back
16

CFW 100 Daffodil + CFW 424 + CFW 414
Model 16 from the collection of models folded by Fujimoto, front
Model 16 from the collection of models folded by Fujimoto, back
17

CFW 149 Maple Leaf, red, with crumpled ray
Model 17 from the collection of models folded by Fujimoto, front
Model 17 from the collection of models folded by Fujimoto, back
18

CFW 85 Petals + possibly CFW 414
Model 18 from the collection of models folded by Fujimoto, front
Model 18 from the collection of models folded by Fujimoto, back
19

CFW 8
Model 19 from the collection of models folded by Fujimoto, front
Model 19 from the collection of models folded by Fujimoto, back
20

CFW 88 Hemp Leaf + CFW 414
Model 20 from the collection of models folded by Fujimoto, front
Model 20 from the collection of models folded by Fujimoto, back
21

CFW 163
Model 21 from the collection of models folded by Fujimoto, front
Model 21 from the collection of models folded by Fujimoto, back
22

CFW 57 Triangle Twist Tessellation, green
Model 22 from the collection of models folded by Fujimoto, front
Model 22 from the collection of models folded by Fujimoto, back
23

CFW 13 Hydrangea basic form E
Model 23 from the collection of models folded by Fujimoto, front
Model 23 from the collection of models folded by Fujimoto, back
24

CFW 155
Model 24 from the collection of models folded by Fujimoto, front
Model 24 from the collection of models folded by Fujimoto, back
25

CFW 13 Hydrangea basic form E
Model 25 from the collection of models folded by Fujimoto, front
Model 25 from the collection of models folded by Fujimoto, back
26

CFW 426
Model 26 from the collection of models folded by Fujimoto, front
Model 26 from the collection of models folded by Fujimoto, back
27

CFW 149 Maple Leaf, yellow
Model 27 from the collection of models folded by Fujimoto, front
Model 27 from the collection of models folded by Fujimoto, back
28

CFW 149 Maple Leaf, brown
Model 28 from the collection of models folded by Fujimoto, front
Model 28 from the collection of models folded by Fujimoto, back
29

CFW 149 Maple Leaf, red, ray not crumpled
Model 29 from the collection of models folded by Fujimoto, front
Model 29 from the collection of models folded by Fujimoto, back
30

CFW 427
Model 30 from the collection of models folded by Fujimoto, front
Model 30 from the collection of models folded by Fujimoto, back
31

CFW 149 Maple Leaf, yellow
Model 31 from the collection of models folded by Fujimoto, front
Model 31 from the collection of models folded by Fujimoto, back
32

CFW 57 Triangle Twist Tessellation, blue
Model 32 from the collection of models folded by Fujimoto, front
Model 32 from the collection of models folded by Fujimoto, back
33

CFW 428 + CFW 418 + CFW 424
Model 33 from the collection of models folded by Fujimoto, front
Model 33 from the collection of models folded by Fujimoto, back
34

CFW 429 + CFW 88
Model 34 from the collection of models folded by Fujimoto, front
Model 34 from the collection of models folded by Fujimoto, back
35

CFW 180 + CFW 414
Model 35 from the collection of models folded by Fujimoto, front
Model 35 from the collection of models folded by Fujimoto, back
36

CFW 430 + CFW 92
Model 36 from the collection of models folded by Fujimoto, front
Model 36 from the collection of models folded by Fujimoto, back
37

CFW 192 Flower
Model 37 from the collection of models folded by Fujimoto, front
Model 37 from the collection of models folded by Fujimoto, back
38

CFW 429 + Water Wheel CFW 89
Model 38 from the collection of models folded by Fujimoto, front
Model 38 from the collection of models folded by Fujimoto, back
39

CFW 432 + 433
Model 39 from the collection of models folded by Fujimoto, front
Model 39 from the collection of models folded by Fujimoto, back
40

CFW 143 + CFW 184
Model 40 from the collection of models folded by Fujimoto, front
Model 40 from the collection of models folded by Fujimoto, back
41

CFW 429 + CFW 434
Model 41 from the collection of models folded by Fujimoto, front
Model 41 from the collection of models folded by Fujimoto, back
42

CFW 429 + CFW 435
Model 42 from the collection of models folded by Fujimoto, front
Model 42 from the collection of models folded by Fujimoto, back
43

CFW 436 - one ray of CFW 423 and five of CFW 422 + CFW 100
Model 43 from the collection of models folded by Fujimoto, front
Model 43 from the collection of models folded by Fujimoto, back
44

CFW 429 + Petals CFW 85
Model 44 from the collection of models folded by Fujimoto, front
Model 44 from the collection of models folded by Fujimoto, back
45

CFW 429 + Scissors CFW 87
Model 45 from the collection of models folded by Fujimoto, front
Model 45 from the collection of models folded by Fujimoto, back
46

CFW 437 + CFW 132 with center modified as Petals CFW 85
Model 46 from the collection of models folded by Fujimoto, front
Model 46 from the collection of models folded by Fujimoto, back
47

CFW 429 + CFW 422 + CFW 100
Model 47 from the collection of models folded by Fujimoto, front
Model 47 from the collection of models folded by Fujimoto, back
48

CFW 429 + CFW 94
Model 48 from the collection of models folded by Fujimoto, front
Model 48 from the collection of models folded by Fujimoto, back
49

CFW 435 + CFW 414
Model 49 from the collection of models folded by Fujimoto, front
Model 49 from the collection of models folded by Fujimoto, back
50

CFW 435 + CFW 414
Model 50 from the collection of models folded by Fujimoto, front
Model 50 from the collection of models folded by Fujimoto, back
51

CFW 438 + CFW 434
Model 51 from the collection of models folded by Fujimoto, front
Model 51 from the collection of models folded by Fujimoto, back
52

CFW 183 + CFW 414
Model 52 from the collection of models folded by Fujimoto, front
Model 52 from the collection of models folded by Fujimoto, back
53

CFW 53 Stars and Squares
Model 53 from the collection of models folded by Fujimoto, front
Model 53 from the collection of models folded by Fujimoto, back
54

CFW 53 Stars and Squares + CFW 54 Propellers
Model 54 from the collection of models folded by Fujimoto, front
Model 54 from the collection of models folded by Fujimoto, back
55

CFW 186 Garland + CFW 84 Windmill + CFW 85 Petals + CFW 87 Scissors
Model 55 from the collection of models folded by Fujimoto, front
Model 55 from the collection of models folded by Fujimoto, back
56

CFW 144 Dahlia + CFW 424 + CFW 82 Flower with a Stem
Model 56 from the collection of models folded by Fujimoto, front
Model 56 from the collection of models folded by Fujimoto, back
57

CFW 293 Back-Twisted Square Twists
Model 57 from the collection of models folded by Fujimoto, front
Model 57 from the collection of models folded by Fujimoto, back
58

CFW 60 Red Flower
Model 58 from the collection of models folded by Fujimoto, front
Model 58 from the collection of models folded by Fujimoto, back
59

CFW 405 Square Twists + CFW 293 Back-Twisted Square Twists
Model 59 from the collection of models folded by Fujimoto, front
Model 59 from the collection of models folded by Fujimoto, back
60

CFW 439
Model 60 from the collection of models folded by Fujimoto, front
Model 60 from the collection of models folded by Fujimoto, back
]]>Michał KosmulskiConvention of the Polish Origami Society in Grotniki2025-07-21T00:00:00+02:002025-07-21T00:00:00+02:00https://origami.kosmulski.org/blog/pto-convention-grotniki-2025 My model exhibition at the Grotniki convention of Polish Origami Society

Last weekend I attended the annual convention of the Polish Origami Society. It took place in Grotniki, a small village near Łódź, Poland. The youth hostel where we met is surrounded by a forest and we had lots of space not only for folding but also for a bonfire and other fun activities. The special guest was Oriol Esteve who brought not only his models but also a great mood and lots of fun.

]]>Michał KosmulskiShuzo Fujimoto’s Tenth Death Anniversary2025-07-21T00:00:00+02:002025-07-21T00:00:00+02:00https://origami.kosmulski.org/blog/shuzo-fujimoto-10th-death-anniversary Shuzo Fujimoto, Ian Harrison, Tomoko Fuse, and David Brill in Japan, December 8th 2003. Photographer unknown, picture courtesy of David Brill.
Shuzo Fujimoto, Ian Harrison, Tomoko Fuse, and David Brill in Japan, December 8th 2003. Photographer unknown, picture courtesy of David Brill.

July 28th, 2025, will be the tenth anniversary of the death of Shuzo Fujimoto. This influential origami creator was a pioneer of geometric origami who introduced many techniques crucial for the development of origami tessellations, corrugations, and 3D objects. Some of his designs such as variants of the Hydrangea continue to be folded frequently. Others are not quite as famous, but still amaze with their beauty and cleverness. Have a look at the Catalog of Shuzo Fujimoto’s Works and explore his creations.

To celebrate this round anniversary, I am publishing (with permission from David Brill) this picture of Shuzo Fujimoto with Ian Harrison, Tomoko Fuse, and David Brill, taken in Sasayama, Japan, on December 8th, 2003. I am also publishing pictures of all the models folded by Shuzo Fujimoto himself that I received from Roberto Morassi. They have been in my possession for about two years now, so it’s about time to share them with the world. I have shown some of these pieces live at origami conventions, but I hope that pictures will also be useful, and able to reach a wider audience.

Analyzing those models is what prevented me from publishing the pictures earlier. I wanted to at least assign CFW numbers to these pieces, which takes time for checking if they match any model of the over 400 already cataloged and deciding what should be classified as a specific model and what as a more generic technique. There is still work to be done, but releasing these pictures in a timely manner is also important. Have a look at this blog post and enjoy.

]]>Michał KosmulskiMy Favorite Paper Has a Street in London2025-07-12T00:00:00+02:002025-07-12T00:00:00+02:00https://origami.kosmulski.org/blog/tant-avenue-london Tant Avenue street sign in Canning Town, London
Tant Avenue street sign in Canning Town, London

Apparently, my favorite origami paper, Tant, has a street named after it in London (Canning Town district). I noticed it on a map during a recent trip and of course had to pay a visit.

Jokes aside, I tried to find out the real source of the name (I guess it is named after a person), but couldn’t find any information about it. Here is a link to the street on Google Maps if you’re curious.

There seem to be a few other streets and avenues named Tant around the world, mostly in the USA. In the case of Tant in Oklahoma, a likely source is Reverend Andrew J. Tant whom I could easily find online as an important figure in the history of the city.

]]>Michał Kosmulski