It's a fun investigation of something similar to Johnson solids but with one or two restrictions removed. Been a long time since I read it though.

I just finished a paper model of a new Stewart toroid I discovered a while ago. This has all regular faces and is non-self-intersecting, with genus 41. All edges of the convex hull are also edges of the model (another one of Stewart's criteria). See my page about it at https://www.software3d.com/Web...

No sorry, you can't do that. The built-in ones that ask are not from files at all, they are built directly into the code and can handle asking for a parameter.

Stella probably won't ever really handle curved surfaces well, although maybe it could have a way to smooth a polyhedron by creating more geometry. Another one for the todo list.

And I've never even listened to King Crimson

The standard Rubik's cube and many of its variations aren't too hard once you know a few basic principles. I gave a 7x7x7 cube, a teraminx and various other twisty puzzles which aren't too hard, although they may take a long time due to the number of pieces. This one though, the "curvy starminx", wa...

We certainly ate a few marshmallows along the way. And the model didn't survive the night.

After sitting scrambled on my shelf for years, I finally figured out how to solve this beautiful puzzle! Seen here sitting on the page of scribbles made while solving.

https://www.facebook.com/photo.php?fbid ... 1739136522

Here's a model I made with marshmallows and toothpicks at MathsJam Melbourne. It could be any of the four polyhedra shown, as they all have the same edges. Three are uniform, the 4th is the compound of 5 cubes. Interesting that you can form regular triangles, squares, pentagons, and pentagrams from ...

OK glad you figured it out. A warning rather than crashing would have been more helpful. I'll look into that.

Not yet. I did try this as a new feature, but not in a released version yet.

I'm still trying to get my slicer (3D printing CAM software) to recognize it as a solid object You can probably fix this by exporting from the stellation view rather than the base view. Polyhedra like this with intersecting faces will be exported with intersecting faces, and some slicers can't hand...

Try using look-at instead of sit-on. The problem is that Stella exports a model with Y up, whereas some STL software uses Z up. I should add an option for this some time. In the meantime, using look-at instead of sit-on fixes it.

Oh, and if the model you're importing is convex, then you can get away with ONLY vertices, and Stella will create the convex hull of those vertices for you.

Oops, yep I got confused too, taking your lead It's the cells you don't need. You need the faces.

How to arrange faces into cells can be ambiguous, but you can leave cells out and let Stella guess.