The Origami Forum

Book: Origami Sculptures

Hello! I've finished steps 1-34 of dromedary as well as steps 6-14 of camel.
What I now have looks exactly like figure 15 (actually, I've already got that far twice).

However, I don't understand how I am supposed to reverse-fold the left corner in accordance with the both folding lines - even by looking at the picture I can tell it's impossible to fit the left side in there in this way.
Next figure 16 (the result) is even more surprising to me: the left corner from step 15 now appears to the right of the middle vertical line - which is also impossible according to figure 15.

What I mean by impossible: If you look at figure 14 (previous one), the dashed folding line divides the left side into two equal and symmetrical parts. It would be possible to reverse-fold using this (same) line on both paper layers - the result would be a triangle. The same procedure is obviously impossible when using two different folding lines (as shown in figure 15).

I know that some of you have experience with that model - surely I'm missing something obvious
Thanks in advance for any help!

Image 1: What I am supposed to do in step 15 of Camel.
(Reverse-fold left corner)


Image 2: It just doesn't fit

If you look carefully at 14, you'll see that the valley fold doesn't quite bisect the corner. Instead, you're supposed to fold between the two corners--not at any bisectors.
So after the step 15, the reversed edge will be tucked up inside the model somewhere (I haven't personally folded this), which should give rise to the reverse-fold in 16.

be patient for a few minutes, i have made photo diagrams for you. Will upload them in about half an hour

sorry, but i have made photo diagrams for the step 15 of dromedary not the camel. I misread your post. XD let me know if you need them.

Baltorigamist wrote:If you look carefully at 14, you'll see that the valley fold doesn't quite bisect the corner. Instead, you're supposed to fold between the two corners--not at any bisectors.

Hm... Figure 14 tells me to "fold and unfold" along the blue line in my first photo. That is, the line connecting the upper-left corner (where the green line starts as well) and the bottom-right corner:

You're right, this line doesn't divide the area into two equal parts - the left side is slightly bigger.

What exactly happens becomes even more clear in figure 15:

Green is mountain fold - it is symmetric, corner A becomes A'.
Blue is valley fold - it is asymmetric, corner B becomes B', which should be somewhere slightly to the right and down from A'. In reality they are even closer (B is not nearly as far as in figure 16).
And now we still have the area marked red which doesn't fit anywhere without folding it additionally (attempt visible between A and B).
Points A and B are just much further away than A' and B'.

I would just assume that I made a mistake somewhere earlier, but I've got that far twice already and get exactly the same proportions. Still, figure 15 looks exactly the same and the whole argumentation applies to it as well...