Penrose Triangle ParadoxJust recently I’ve been getting a little carried away with 3D printing seemingly impossible objects.

You might want to call these paradox designs or optical illusions but whatever label you put on them they’re very interesting to print and impressive to look at.

If you recall a few days ago I wrote a short blog post with an accompanying YouTube video explaining a 3D printed illusion called the Penrose Triangle.

Yesterday I found an even better version of this and after taking a great photo of it, again I felt that I really needed to share this with you sooner rather than later.

If you haven’t already, take a good look at the photo at the top of this blog post and you’ll realise that this object is impossible to make, but somehow I did.

Of course it’s an optical illusion but an impressive one at that. I promise that this photo wasn’t doctored in any way, I literally held up the object in a darkened room with the correct lighting, took the photo and included it in this blog post, completely unaltered.

If you’re in any doubt and you have access to a 3D printer, pop over to Thingiverse, download the Penrose Triangle Illusion  and try it for yourself.

What’s so surprising about this illusion is that the object used to create this illusion hardly resembles how the resulting illusion looks, when the correct view point and lighting are applied.

Penrose How to MakeAs you can see from this photo of the exact same object, without the correct viewpoint and lighting this looks like some random patterned triangle.

Also, in the illusion all the points of the cubed that look like they’re closest to you are actually furthest away in reality, it’s just the lighting that makes the convex shapes look like cubes.

I hope you like this illusion and don’t mind me publishing these as I find them. As I said before in my original Penrose Triangle Article from a few days ago, I’ve been busy printing loads of other stuff too.

I will be reporting on these soon but if you want to see my 3D printed objects literally moments after I make them you can Follow Me on Twitter or Like My Facebook Page, where I post all the best stuff as I make it.

Should you be interested in 3D printing cool stuff like this yourself, you can always download my FREE Beginners Guide to 3D Printing at Home and get started today.

Thanks for reading and feel free to Like and Share this article with your friends, especially if they like magic.


3D Penrose TriangleIf you’re a fan of optical illusions then you may be familiar with the Penrose Triangle.

Often depicted in 2D it’s an impressive example of an object which is seemingly impossible to create in 3D.

Well, someone has ‘kind of’ managed it and if you look at the picture above you’ll see the version I 3D printed and photographed myself. This illusion has been around since 1934 when Swedish artist Oscar Reutersvärd first created it.

2D Penrose TriangleThe beauty of this illusion is that if you have access to a 3D printer you can download the object and recreate it yourself. It doesn’t even require supports or rafts and doesn’t take long to print.

The only hard part is finding the exact angle and distance from which to view the object to create the perfect illusion.

I struggled with this part so that’s why I created the video, to make your life a little easier.

So you might be asking, how did I manage to 3D print an object which is supposedly impossible to create?

All is revealed in this short YouTube video…

As you can see from the video it’s still an illusion and this ‘impossible object’ really is still impossible to create properly. I think this 3D illusion is still pretty impressive so why not try it for yourself?

Here’s the link to download the Penrose Triangle from Thingiverse.

By the way, you may have noticed that this is a quite short blog post compared to my usual ramblings. Well, I loved this illusion so much I really wanted to get it to you as soon as possible so you can try it too.

Don’t worry, I have loads more 3D printing antics on the way to add to my 3D Printing Beginner Series. As ever, my MakerBot hasn’t had much rest over the last few weeks, so watch this space.

Feel free to Like and Share this with your friends if you think they’d be interested in it.

Thanks for reading.


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