Challenge 30 is Seishi Kasumi’s “Mask of Ape”. It looks more like a monkey mask to me. The Japanese title of the model is “猿”, which can be monkey or ape, so I guess it can be either.
This is a pretty nifty 3D model. I initially didn’t like it too much, but it grew on me. The first time, I used rigid paper to hold the 3D shape, and, the second time, I used the flimsy paper I usually use. Both times I drew in a lot of the lines to make it easier.
This first time I drew in the lines with red for mountain folds and blue for valley folds.
Since I was better at keeping track the second time, I just used yellow highlighter to draw in lines. It lit up when the camera flash hit it for a neat effect. I hope it works the same way with a black light.
Crease Pattern Challenge 23 is a Heptadecagonal Tato designed by Seishi Kasumi. A tato is a flat container for stamps and stuff.
I did this one by making a blown up copy (you can see the lines). There are actually instructions for how to get the necessary lines on a page, and I started with that. First, I got the paper to 9 by 17, then I started the initial reference folds, and then wow. It wouldn’t be that tedious (especially looking at previous models), but the number of reference lines with respect to the final applied lines was something. It had at least double the lines radiating out from the center, and all the edges were folded completely. I decided to print it for time and so it wouldn’t have all the extra creases.
After all that, this was kind of fun. I always like things that collapse together.