In this video I'm going to show you how to fold an origami tessellation called ‘Celtic Circle’ discovered by Robin Scholz.

For more of his fantastic work, do check out Robin’s Flickr stream.

Now in this video I'm going to use a hexagon sheet of paper with a height of 18 cm or 7 inches, and the resulting tessellation then has a height of about 12.

5 cm or 4 7/8 in This, by the way, is the reverse of the model.

If you don't know how to cut a hexagon, I've got a video on that.

Or fold the pattern on a triangle grid folded from a square.

We need a 32 division grid for one Celtic Circle molecule.

I’m speeding through it here.

If you need details, simply watch my video on how to fold triangle grids on a square or a hexagon.

Now usually I'd recommend pre-creasing the pattern of the tessellation before collapsing it.

But I figured it'd be nice to show that you can also add creases as you go along, and this pattern is very suited for it.

However, especially if you're quite new to tessellations, you may want to pre-crease all of the off-grid creases or at least draw them in.

You can also print out the crease pattern that's available on my website and then fold the tessellation from that sheet.

So now that the grid is done, let's get started! We're first going to start in a point and go one grid crease up and make a mountain fold to perhaps the center or just a little less.

And then the next one.

We have to add an open-back hexagon twist, but as I mentioned before, we're not going to add any of the off-grid pre-creasing.

And you’ll see that this is actually quite fun.

It's perhaps a little more difficult, but you also can achieve nicer precision because you definitely get exactly to the grid intersections working this way.

Now once you have those in place, you're going to fold them to the top going along the next grid line, and push to the centre.

And do that all the way around.

And then we're just going to press from the back to have this pop up, and then you try and extend this so that you can see a small star-shape popping up, just going inside a little further, and perhaps laying this flat.

And I'm just going to zoom in on that portion so that you can really nicely see that star shape.

So here you can see the central point of the sheet, and you will have a star shape right around it.

And the open-back hexagon twist will be centered on that small star.

So if I’m just pushing this in a little more so that you can really nicely see that star popping up.

Can you see that? So once you've got that, you can then simply push this around, and you can already see the paper twisting, and this is like the Star Puff.

And then you just simply press having a bit of tension in the paper so that you really reach those end points.

And now, you're adding new creases, and you have that open back Hexagon twist done.

Now we're going to continue with open-back triangle twists.

So we're just going to take one of these pleats here and open it up.

and then if you look, this is one of the pleats, and that's the one that's next to it.

From there, we're going to count from the point: one, two, three, four, five of those grid lines, and take the fifth, and make a mountain fold out of it.

And then on this pleat, which is, if you're looking at it like that, the one clockwise.

You're going to look at that pleat, and then go two grid lines and make a mountain fold and then push it over.

So now you have this mountain fold and that one and this one And you make them almost meet, and this one you're going to also fold clockwise.

And if you do that with all three of them here you can see they'll match up here the two edges and this one's already collapsed a little.

Then you just push, and then there will be tension here, and you just increase that tension by folding down the pleats and then adding new creases.

And then you have your first open-back triangle twist done.

And then you go to the next one Again, we're going to open a pleat right here then we're again going to count from that corner and this time we're going to count one, two, three, four rather than five and add a mountain fold and for now go through that pleat without opening this one but open that one This is also why we counted 4 rather than 5 this time And then here again you're going to count 2 of those grid lines and fold over and same here, fold over And then you can again push that down to get tension in the paper and ensure you're really nicely hitting those grid intersections If you're having trouble with the paper misbehaving, you can go in there and push it out, with perhaps a toothpick and then flatten.

And I'm just going to zoom out a little and show the next one.

So again, for the next one, we'll work with this pleat and we meet at a mountain fold 1, 2, 3, 4 Go through that pleat without opening it Open that main pleat and here, again, collapse to the left Same here Apply pressure And then check that you increase the paper tension to then get a nice accurate triangle twist — open-back triangle twist, actually.

And that's the next one.

And continue.

1, 2, 3, 4 And the next one.

And the last one.

Now the last one's going to be slightly different, just because we already have an open-back triangle twist here.

But for starters, we're again going to count 1, 2, 3, 4 and add that mountain fold And open this main pleat and now, we're simply going to count 1, 2, 3, 4 on this side too.

And also go through the pleat.

Then again fold over clockwise to add that last open-back triangle twist.

Now we have this quite beautiful pattern already, which reminds of a star and here a pattern that you could describe as a weave.

Now next, we're going to add more of these open-back hexagon twists So for that, we're going to open one of these sections — just going to rotate it — and open it here and you have these 2 open-back triangle twists, and these open-back hexagon twists are going to be centered around them And again, we're going to try and find a star shape So for this, we're just going to take one of these points of the triangle and count 2 of these triangle edges to find one of the points right there, and the same here I'm just quickly going to draw this in so that you can see it more nicely.

So here, you count 1, 2 edges — there's a point here And here you count 2 edges, 1, 2, — there's a point here And then you can complete that to a star shape and we can even draw in the edges So this is what we're going for for the next open-back hexagon twist So we've already got mountain folds going to these and now we're going to take that corner and also add a mountain fold And with practice you don't have to draw in these star shapes But perhaps just for practicing, it's quite helpful And then you're going to push these so that they go to the right Always to the right, following the direction of the others And then you can push it down and by applying pressure you can then add the new off-grid creases.

And then you have your next open back hexagon twist And then you go to the next section where these pleats meet And you just open it as before And as before, you count 1,2, 1, 2 to get an orientation for the star and again, I'm just going to mark this so that it's easier for you to see because of course, when you're doing this the first time having a bit more orientation does help.

But let's try this time to just work with the points and see how far we get.

So we're reaching these points with our mountain folds And we just need to ensure that we're — if you look at it like this — we're taking the central one so that you can actually collapse this down And then again rotating over to the right Can you see that nice star here? And then pushing over Now you will see that there's some tension here and we need to add another open-back triangle twist here But let's first finish that open-back hexagon twist by simply collapsing down and then we can see here we've already got 2 mountain folds here We just need to add the 3rd one We've got a pleat here we're going to count 2 grid lines over and then push that over to the left again And then increase the tension by extending those pleat lines And then add a nice open-back triangle twist here So now you can see you have these 2 new open-back hexagon twists and an open-back triangle twist So we added these 3 structures And now you can continue with the next one Always opening the pleats between 2 open-back triangle twists and locating the star that you want to work with to then add the mountain folds and start collapsing them down Ensure that you're really hitting those points of the star before you add the off-grid creases And then again, work on the open-back triangle twist counting in 2 grid lines from this pleat right here And folding it over to the left catching the points and adding new creases And continue And the last one Now on the last one you'll have a triangle twist both on the left and the right But first again add that open-back hexagon twist And here, simply open the paper a little to give yourself a bit more paper to play with while you're collapsing that open-back hexagon twist.

And again ensure that you have that nice star shape popping up before collapsing into those newly-created creases.

And then finish the 2 open-back triangle twists.

And then your Celtic Circle pattern by Robin Scholz is all done.

This is the front and the reverse and of course, applying backlighting shows that amazing pattern even more, and especially that circular shape that gives the model its name.

By the way, even the reverse backlit is really, really nice to look at too.

And now that you know how to fold this tessellation, how about you try the Star Puff tessellation by Ralf Konrad or check out my playlist of further origami tessellations and fractals Finally, to enable you to fold many more tessellations, I've also got a playlist of tessellation basics explaining various twists and such on a triangle grid.

Subscribe to my channel so you don't miss my next videos and finally, do check out my website happyfolding.

Com for more origami content.

And thanks so much for staying until the very end of the video So I thought I'd show you a tessellation I did that actually features 7 of these Celtic Circle molecules Yes, it takes a lot of time.

This is folded on a 96 division grid but doesn't it look absolutely fantastic? especially when backlit.

Also I will note that these circles I connected with more open-back triangle twists which you can see here and also that opening right there So if you're up for the challenge, I do have a crease pattern on my website for you to download to help you along, and if you do fold it definitely send me a picture to [email protected]

Com because I'd love to see your result And of course you can arrange these molecules in many different ways and combine them with other patterns For inspiration, Robin has a Flickr album showing some of his Celtic Circle projects such as a bookmark of a column of 3 molecules And of course, you can really fold whatever you like best So with that, happy folding, and happy tessellating!.

Source: Youtube