MEMegranium·Oct 19, 2026
I thought so too but then I discovered the BOSL2 library and all kinds of others ... makes cubes with round edges so much easier :)
https://github.com/BelfrySCAD/BOSL2/wiki/Tutorial-Rounding_t...
In RepRapMicronBelfrySCAD
BOSL2
OpenSCAD2020–2026
BelfrySCAD / BOSL2
BOSL2
The Belfry OpenScad Library, v2.0. An OpenSCAD library of shapes, masks, and manipulators to make working with OpenSCAD easier. BETA
21Distinct people
26Mentions
1Explicit recommenders
2.5KGitHub stars
What to know before exploring
What it is
The Belfry OpenScad Library, v2.0. An OpenSCAD library of shapes, masks, and manipulators to make working with OpenSCAD easier. BETA
GitHub
Where it is used
- QuackWorks — We use BOSL2 as a dependency and needs to be install accordingly. Source
What people are saying
Commenting off of you since I wrote all of this and then realized it's basically exactly what you're saying. But to +1 everything you just said in my own words: I love…
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HN mentions by year26 dated mentions
Observed mentions: 2020-09-19 01:24:40 UTC to 2026-10-19 07:41:54 UTC.
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| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 1 | 1 | 0 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 8 | 0 | 8 |
| 2026 (partial) | 2026-01-01 00:00:00 UTC | 2027-01-01 00:00:00 UTC | 9 | 0 | 9 |
What Hacker News says
26 sourcesThe BOSL2 library makes it easy: https://github.com/BelfrySCAD/BOSL2/wiki/shapes3d.scad#modul...
In OpenSCAD the Programmers Solid 3D CAD ModellerOpenSCAD is amazing for those who know nothing about 3D but know about programming.
I bought a 3D printer (which is basically simpler and more reliable than a 2D inkjet printer by now: it's send the file, put the filament, and 3D print and it just works) recently and already fixed shitload of stuff around the house with 3D printed parts.
I even did "print in place" pieces where you add a pause a a certain layer, insert "stuff" (like say a 3D metal angle) into your print, then finish your print. Effectively creating parts that are both plastic and metal.
Now the language itself in OpenSCAD is kinda really bad: you can define variables inside of other functions and then use them everywhere. You can redefine already defined variables and you'll get zero warning. The language itself is really pretty WTF.
But you get modelling for free as a pr
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ogrammer. And LLMs are okay'ish at it for simple stuff.
I'd recommend people to use the BOSL2 library for OpenSCAD:
https://github.com/BelfrySCAD/BOSL2/wiki
It's really not hard.
If you love programming and like to DIY stuff around the house, buying a 3D printer and learning some OpenSCAD is a no-brainer.
OpenSCAD ain't the only option: many people like Fusion (for example). But as I'm a dev, OpenSCAD just feels natural to me.
using BOSL2 alleviates most issues I've run into with OpenScad for chamfers and the like, but it is an extra set of functions you need to remember sadly
https://github.com/BelfrySCAD/BOSL2
In Open source CAD in the browser (Solvespace)I was in your shoes about a year ago with an A1 mini, getting into OpenSCAD to make my own keycaps.
If you're getting into OpenSCAD I'd highly recommend getting Belfry ASAP.
https://github.com/BelfrySCAD/BOSL2/wiki
I wouldn't really consider using OpenSCAD without it
In 3D-Printed Mathematical LampshadesYup, the attachments with BOSL2 are really great. You can do a ton without much math at all, TBH.
https://github.com/BelfrySCAD/BOSL2/wiki/attachments.scad#se...
In Parametric CAD in RustOpenSCAD is very nice but if you combine it with BOSL2 you can do miracles:
https://github.com/BelfrySCAD/BOSL2
In A Year of 3D PrintingBTW, if you want to design some models for 3D printing but the only thing you know to do is to code, you can use OpenSCAD & program the obejcrs into existence:
https://openscad.org/
Also recommend using the BOSL2 library with OpenSCAD - it turnes an already very powerful tool into something insane:
https://github.com/BelfrySCAD/BOSL2
In I wanted a camera that doesn't exist, so I built itOh, maybe you mean attaching.
https://github.com/BelfrySCAD/BOSL2/wiki/attachments.scad
In OpenSCAD is kinda neatLet me introduce to the awesomness of the BOSL2 screw module:
https://github.com/BelfrySCAD/BOSL2/wiki/screws.scad
In OpenSCAD is kinda neatBOSL2 can help with that:
https://github.com/BelfrySCAD/BOSL2/wiki/rounding.scad
https://github.com/BelfrySCAD/BOSL2/wiki/Tutorial-Rounding_t...
In OpenSCAD is kinda neatI ended up adding the https://github.com/BelfrySCAD/BOSL2 library to OpenSCAD and it had some reasonable options for some gear and rack-and-pinion modeling that I needed to do.
(3D printing a sacrificial gear for a seat position adjustment mechanism)
In OpenSCAD is kinda neatCommenting off of you since I wrote all of this and then realized it's basically exactly what you're saying. But to +1 everything you just said in my own words:
I love OpenSCAD. I've been 3D printing for a while, but I never really got to a place where I could design interesting parts until I started to get the precision of doing models in code. Sometimes it is slower, for sure.
Every time I've used as a CAD GUI program I would get to this point where I would need to alter a single dimension by 0.25mm and realize that _all_ of my fastener holes, cutouts, etc have to be nudged with the keyboard or mouse to accommodate it. The input devices lack precision for that kind of task, and having to repeat the operation dozens of times (or bulk select) gave me a terrible sinking feeling, and I'd often just step away and give up on the design at tha
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t point out of frustration. I try to approach everything in OpensSCAD in a way that means I never have to experience that feeling again.
I will also say that doing everything from scratch in OpenSCAD would be it's own special kind of hell. Libraries like [BOSL2](https://github.com/BelfrySCAD/BOSL2) provide a good set of core ideas and preferences that help set you on a good path. A good example: BOSL2 shapes tend to have a "center origin" by default, which is different than the OpenSCAD default, but makes doing transforms later way easier.
Anyway, happy to see OpenSCAD getting some attention here :)
It's super useful, been using with my 3D printer to print things such as an adapter to connect a Canon EF lens to night vision tube and parts to link motorised linear stages together.
Currently I'm playing with a gear library which is part of BOSL2 (https://github.com/BelfrySCAD/BOSL2/wiki/gears.scad), to make something to rotate a polariser in my microscope.
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