On Thu, 13 Jun 2013 22:48:12 +0200, Eriban  
<pov### [at] spamgourmetcom> wrote:

> Hi all,
>
> Here's a fun little animation I recently made. It's small enough to be  
> uploaded
> as an animated GIF. Hopefully that will work.
>
> The model is a mesh, generated entirely within POVRay via a few custom  
> macros.
>
> I will shortly have this printed in 3D via Shapeways. For this, I  
> exported the
> meshes from POVRay into ASCII .STL files (because it's an easy format).  
> These
> were converted into .3DS using MeshLab and subsequently imported in  
> Sketchup,
> where I merged the meshes into a single, closed volume without any  
> interior
> vertices (something POVRay does not mind, but Shapeway does). I am  
> curious to
> see how well the illusion will work in real life.
>
> Cheers,
> Erwin

I wonder if the impossible triangle would be possible in 4d space. Looking  
at an animation of a rotating 4d cube makes it seem possible to me, but I  
don't have a clue if it is mathematically possible. .. and with straight  
sides of course.
-- 
-Nekar Xenos-

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