Nah, I haven’t yet found it… and not looking real hard.
https://www.babylonjs-playground.com/#14VFYX#37
See line 22? Just add many of those lines, and push various “dangerous” values into those parameters. Dangerous shapes. 
Add some textures and scalings, some meshImpostors and sphereImpostors, some sparkly particles emitting from mesh normals, and boom… we’ve “3d-addicted” the NEXT generation of BJS mad scientists. 
Here is a search for playground series… with ‘superello’ somewhere in their codes. Babylon.js Documentation. Party on.
Update: https://www.babylonjs-playground.com/#14VFYX#0 That’s the one I was searching-for. I wonder who coded it. An interesting system, just like the other cool ideas/solutions in this thread. It seems to be all 6 or 8 -sided mesh, so far. No mention of ‘Catmull’ either. I think Mr. Catmull was involved-in converting existing sharp-edged mesh… into round-edged. These Super-Ello’s are actually “grown” with rounded edges, so no Catmull-ish filing or grinding required.
Those rounded edges really improve child playpen swallow-ability. hah.