### Origami Palm Civet

Civet is cat-like mammal that can be found around Africa and Asia. Different species have different fur pattern. The one used is palm civet which can be found in Indonesia.

All the appendage in this animal has color change: snout, ears, legs, and tail (which starts from the back). Therefore it is a good subject for color change.

# Design

Color change on the legs and tail should be straightforward. As long as we use edge/corner flap on them, we can do outside reverse fold near the tip and unwrap the paper inside-out. The challenge lies on the head.

There is a multipurpose base to make a quadruped creature with tail and some features in the head (horn, antler, ear, etc). It has two squares and two rectangles. The rectangle provides the necessary river to separate forelimbs and hind limbs. The initial plan:

As you can see, the limbs are formed from the paper's boundary. So this base is well suited for civet.

To design the head, I start with the snout. It is done by pleating and pulling out 1 layer to expose the other color.

Second is the face. The plan was to use a short flap and do improvisation to expose the color. So just imagine we have that short flap:

Last is the ears. Repeat the same process by adding another short flap, and do trial and error.

So we need a long flap and 2 pairs of smaller flaps to make this head. The shape should looks like this:

All those flaps need to be in the paper's boundary. Represented as circles on the paper's corner:

It can be put directly on the body as shown below. I used fish base with border grafts to fill the molecules.

The crease pattern is complete. I folded the base, and found that the body is too long. To fix it, I need to reduce the gap between forelegs and hind legs. This is done by changing the rectangle's proportion from $$\sqrt{2} : 1$$ to $$1 + \sqrt{2} : 2$$.

Why use such proportion? It's because the reference point is easy to find; simply extend the spread-sink's fold (blue dashes in picture below) until they meet at a point as triangle. I like to use this kind of trick to simplify locating references.

The other change is the tail. I stretched the bird base to produce longer tail, at the cost of shorter hind legs. This is a technique I learned from Tetsuya Gotani's book. It produce a neat structure which lies between fish base and bird base.

Here is the final crease pattern.

# Fold

The body can be quite thick, so I want to use double tissue. However I failed to make a double tissue with black and brown color. The black paint will leak to the brown part. I might try to add another brown tissue paper, but in the end I decided to use tissue foil.

Shaping the model is quite hard. I need to be careful so the model doesn't look like dog. To do so, I made the eyes larger, crimp the back, and adapt a crouching pose.

### Warped and Wrinkled Paper Curse

After starting using Carboxy Methylcellulose (CMC), I began to wonder if my setup wasn't right. The problem was my double tissue would always peel itself when drying. There will be high pitched popping sound from the paper every now and then. Finally it would be completely off the surface. Whereas on every tutorial I saw, the paper will still stick to the surface and we have to peel it off. The bad part is the paper will be warped; it's not flat. It is difficult to fold a straight line on paper like this. Imagine precreasing a grid or locating references when your fold can be bent due to the paper's bump. I have theory on why the warp happened. Before going to that, it is important to know that: When a paper is wet, it expands. When it dries, it will return to the original size. However it will keep its shape when it is wet, meaning that if it is bent when wet, it will retain that bend when dried.  When my paper dried partially, that region will shrink. This created differe

### Origami Ibex

Ibex is a type of wild goat found on Eurasia and North/East Africa. Easily identifiable by its long curved horn full of ridges, which is what I'm trying to express here. Nubian ibex is vulnerable to extinction due to competition with livestock and habitat loss. Ibex has been nearly extinct multiple times in the past because of hunting and unable to compete against livestock. The most recent extinction was Pyrenean ibex, in the year of 2000. Image source:  https://animals.sandiegozoo.org/animals/nubian-ibex I want to make my model to be instantly recognizable as an ibex, not a goat. Horn ridges are rather specific for ibex, so I tried to represent that with spike structure commonly used on insect legs.

### Origami Helmeted Hornbill

Helmeted hornbill is a huge hornbill with round casque, featherless throat, spiky hair, and two very long tail feathers.  Unlike other hornbills, its casque is solid and for some reason some people like it. It is sought as valuable item just like elephant's tusk. Overhunting has driven them to be critically endangered. This is the most challenging subject that I've attempted so far.