What's allowed in pureland origami?

[Gerardo]

Hi, I wanna create a pureland model. I found the rules of pureland origami here: http://www.nickrobinson.info/clients/sm ... reland.php

RULES OF PURELAND ORIGAMI

(1) Only a square to be used.

(2) Only Mountain or Valley folding to be used. It is permissible to unfold a valley or mountain fold and to turn a model over while folding.

(3) 'Tucking in' or Opening up to 3D is acceptable provided no creases are made in the process

(4) In the purest' of Pureland all folds should be exactly locatable. John Smith latter says: "... there must be landmarks for all essential folds."

(0) It wasn't included in the rules, but he does say in th next paragraph: "...only manipulate one fold at a time".

After knowing this I have three questions. I would REALLY REALLY REALLY appreciate it if someone helps me answer them; I kinda hate it when posts like this one end up completely unanswered.

1. Is it impossible to create a pureland model that rates more than one star in the five star complexity system? In other words, is it impossible to even create a low intermediate model using pureland rules?

2. Is "fold in thirds", as the first step, unacceptable according to pureland rules? I think it is because it would question rules 4 and the unofficial number 0; The only one-step-way to have landmarks to fold in thirds is to fold opposite borders AT THE SAME TIME, right? So that wouldn't be pureland.

3. Is this step allowed in pureland?



I THINK (I'm not good with the names of folds) that that's a "swivel fold". I would only be making one fold (rule 0), it would be a valley fold (rule 1), and it's a fold that's very easy to locate (rule 4). Would that mean that "swivel folds" are allowed in pureland origami?

Thank you for all your help, I REALLY wanna grow as a pureland creator!

[Axel´s Origami]

Well, you could devide it in 2 steps instead of one step, first make the vertical fold,
and then pull out the layers. then it would be allowed.

[the modern einstein]

yes, according to some further research I did, it is.

[Gerardo]

Well, you could devide it in 2 steps instead of one step, first make the vertical fold,
and then pull out the layers. then it would be allowed.

Could you please provide some diagrams or photos? I just want to be sure I understood you correctly.

Are you sure "pulling out" is allowed in pureland origami? I see "tucking in" is but I don't think that that would mean the opposite is also allowed.

Thanks for your help!

yes, according to some further research I did, it is.

FURTHER RESEARCH! Please tell me more about the research you did in this subject! Where did you find the information? What did you find out?

Also, you typed "yes" but you didn't mention to what question: my first, second or third question?

Thank you the modern einstein.

[the modern einstein]

just search up on Google. if you keep on going to around the tenth page of results there's some interesting pages there. there's this random blog of this guy who asked robinson about it and got a list of all the folds you could do. by the way - you may not get the same results as Google changes it's results according to your location in the world. I was answering your one about the swivel fold. sorry I didn't see your first two questions, I only saw the one on the swivel fold. on the first two questions, there probably is a way to create a pureland model with more than one star rating, but it would be based on your design skill more than anything else. on the second question, there is a way to fold a paper into exact thirds, invented by thomas hull, and the sequence means that you could be able to divide into thirds, and still maintain a pureland integrity.
Note: just because i have the name the modern Einstein doesn't mean I'm a genius.

[Gerardo]

there's this random blog of this guy who asked robinson about it and got a list of all the folds you could do.

I'm really interested in the blog entry you mentioned. I didn't have too much luck finding it. Could you provide me something more concrete? The blog's name, the name of it's author, the entry's title, URL, anything? What you mentioned about that entry is exactly what I need : ).

Also, I had no idea of the Hull method. It's perfect for pureland origami!

[Axel´s Origami]

"Fold into thirds" is an acceptable first step. I found a few pureland models that start with that.
And yes, you could make complex pureland, but it will probably take like forever to fold.

I'll make a photo diagram soon.

[the modern einstein]

I can't actually remember the URL, or find it again. sorry, but I closed it immediately after reading it, and didn't take a look at the URL, or the name of the blog. sorry.

[Gerardo]

"Fold into thirds" is an acceptable first step. I found a few pureland models that start with that.
And yes, you could make complex pureland, but it will probably take like forever to fold.

I'll make a photo diagram soon.

Thanks Axel. That will really help .

I can't actually remember the URL, or find it again. sorry, but I closed it immediately after reading it, and didn't take a look at the URL, or the name of the blog. sorry.

I ended up sending Nick a message, hopefully he'll know something about that post and help me find it. Thanks!

[Axel´s Origami]

It turned out my idea sucked, yours is better

[Gerardo]

It turned out my idea sucked, yours is better

Looks like we were wrong That fold isn't allowed. I got in touch with Nick Robinson who directed me to John Smith who had originally proposed pureland origami.

This was his e-mail response:

Thank you for your interest Pureland Origami.
I am not sure I can be much help as I have difficulty in understanding the questions, not your fault but my limitations!

1. Is it impossible to create a pureland model that rates more than one star in the five star complexity system? In other words, is it impossible to even create a low intermediate model using pureland rules?

/I don't know what the complexity system is. The idea of Purealnd is to adopt constraints which can yield easy-to-fold models.
Within the constraints I found a way of doing reverse folds, in fact I produced a bird base, the method was crude and not in the spirit of Pureland. /

2. Is "fold in thirds", as the first step, unacceptable according to pureland rules? I think it is because it would question rules 4 and the unofficial number 0; The only one-step-way to have landmarks to fold in thirds is to fold opposite borders AT THE SAME TIME, right? So that wouldn't be pureland.

/I use Fujimoto's method which only requires one fold to be manipulated at a time which is the essential constraint of Pureland /

3. Is this step allowed in pureland?

The answer is a decided NO! . The swivel fold is a form of reverse fold which therefore requires 3 folds to be manipulated at the same time.


/I ought to add that Pureland is not a strict set of rules. The idea was to adopt the simplest means of creating Origami , if you refer to my web site I do explain the origin of the ideas/

Hope this helps a bit

regards

John Smith