Other options, not tested enough to fully recommend and include in article:
- Ultimaker Cura - produces the most repeatable results I've seen so far. Has a tendency to phone home, but check if it passes your open source smell test. It does for me.
- thearn/stl_tools: Python code to produce STL geometry files from plain text, LaTeX code, and 2D numerical arrays (matrices) — only seems to install using pip, not pip3.
- Potrace - convert bitmap to vector for input to OpenSCAD. Is picky about input format. Possibly the backend used by Inkscape.
- autotrace/autotrace: bitmap to vector graphics converter - much older tool than potrace, sometimes gives cleaner output. Was dropped by Debian after it lay unmaintained for many years (roughly 2005–2017), but recently seems to be under active development again.
Not universally recommended: direct PNG import into OpenSCAD using surface(). Can generate very large files that may not slice. --Scruss (talk) 09:31, 25 February 2019 (PST)
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