Do you use OpenSCAD? Have you ever wished it was faster? Or had the power of a popular programming language? Or that it didn't require installation? I have used OpenSCAD for many years, but I have now built my own open-source web app akin to OpenSCAD, but using JavaScript / TypeScript with a modern editor with code completion: ManifoldCAD.org

You'll find this Menger Sponge as one of the examples in the drop-down menu. It serves as the logo for my Manifold library, which is my open-source geometry kernel that powers ManifoldCAD (and has also been recently adopted by OpenSCAD, to get 100-1,000x performance improvement).

ManifoldCAD has no backend - it autosaves to your browser's local storage and works offline - you can even install it from the browser's toolbar if you want. Many thanks to the team of excellent open-source collaborators that have turned this hobby project into serious work of engineering! If you are interested in contributing or using this library in your own project, please let us know in our forums!

MakerBot

MakerBot Replicator Dual

No

No

0.2mm

None

This fractal forms an infill pattern of sorts, so there is no need for any infill and even a single shell will be plenty strong. I would recommend checking that no extra top/bottom fill is being added - in Cura I turned the angle for top/bottom fill to 30 degrees so that it wouldn't put unnecessary fill over the corners.

I would recommend printing the small one first to check settings - I can print it in under 20 minutes. The big one took me 5.5 hours. Of course you can also scale them to your desired size.