IOIO-2025: Task-3 (Penrose Punch)

Just a reminder: there’s no better place to use our fancy papers than at the origami olympiad

It′s funny that I collapsed mine in the middle of the Atlantic ocean, since I was on a business trip.

Near the end it got stressful - about 6–7 people on the plane started staring at me, even turning around from the seats in front to see what I was doing

I love your comic (even incorporating the Penrose Punch model). But there is no _best_ paper only the most suitable paper for your intended interpretation. For example I have used French butcher paper (less transparency than real glassine but much better tolerance to reversing creases. That being said I sit on a stash of about 20 sheets of Origamido and countless sheets made by John Gerard. Just waiting for the right project. I won’t probably be able to fold all of this paper before my death. But I’m not hesitating to use good paper: I test folded the flower with 20 cm brown Shadow Thai, decided that the size is not ideal (and didn’t cut my violet 40 cm Shadow Thai into fourths), tested yellow acrylic paint on a violet 30cm Shadow Thai, wasn’t satisfied with the results and finally settled on using a duo paper (another 30 cm violet Shadow Thai + another yellow paper).

True, it′s up to the final artistic representation you want to achieve!

Cool, I have test folded mine just with kami, tho I did a secondary test fold on the Zijin Grass to understand the specifics of the model while being collapsed with the same paper I used for the final submission.

Just curious: are your cutting matt grid lines measured in cm or inch?

Actually each square on the grid is 5 cm. I did the test folds with standard 15 cm kami sheets

I test folded the flower first with 15 cm Kami to learn about the structure then with 24 cm Kami paper. As I wrote I then test folded with 20 cm Shadow Thai. Finally settled with a duo paper of 30 cm Shadow Thai/Washi paper.

I test folded the dog with 24 cm Kami, then 35 cm duo color Kami. Finally decided to use 30 cm Shadow Thai. Less shapable than other options would have been, though. But so what.

My largest pentagon template (not sold anymore by Carmen Sprung) fits on an A4 paper. The first test folds with Kami and even Madonna Yoder’s preferred paper were made with this size. I painted the crease lines on these test folds. The final fold was from a Pentagon made from a 30 cm square of butcher paper using these paintings as a reference. I tried to minimize precreasing.

It has endless shaping possibilities!

@Niki Lubomirov :

It′s funny that I collapsed mine in the middle of the Atlantic ocean, since I was on a business trip.

Now that′s some determination, quite difficult to compete with! Paper choice looks great!

Really enjoyed that one. Actually, IOIO is the only place and reason I fold tessellations. I would not otherwise pick one to fold, and now that I think of it, these are the challenges I am looking most forward to during the olympiads.P.S. The diagram nearly made me cry, but I have no more tears left to cry on tessellations after the Sisyphus nightmare that was cast upon us last time :D