PythonSCAD v0.20.0 released

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nomike Postmann

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Apr 14, 2026, 8:26:35 PM (4 days ago) Apr 14

to PythonSCAD

Hi everyone,

We’re happy to announce PythonSCAD v0.20.0. The headline change is session management: the app can remember how you left off and bring that workspace back on the next launch. This is similar to what applications like NotedPad++ and Visual Studio Code are doing. We’ve also improved reliability in a few places, rounded out Python API documentation, and made small quality-of-life updates. Full technical notes are in the changelog on the release PR.

Session management (new)

v0.20.0 introduces session persistence. When you quit and reopen PythonSCAD, you can get back your open tabs and editors, multi-window layout, customizer state, view and find state, and per-tab language—so routine work is easier to resume without rebuilding your environment from scratch.

The feature also includes autosave-style crash recovery, a clearer flow when closing tabs with unsaved changes, and a session option in Advanced preferences if you want to control the behavior. Customizer tweaks can apply without always pressing F5, and the stack includes dry-run safety so heavy preview work is harder to trigger by accident.

All of this ships as one coherent capability (see PR #415).

Note: To go back to the old behavior, you can go to Edit > Preferences > Advanced and disable the session management option. We tested this new feature quite extensively, but any feedback or bug reports on this new feature will be highly appreciated.

Improved unsaved-files dialog

When you want to close PythonSCAD a new dialog will list unsaved tabs and allow you to individually save them or decide to not save the remaining unsaved changes.

Save dialogs and editor language

Save and Save As now match the editor language you’re in: suggested names and filters line up with .py vs .scad, including sensible default folders so native file dialogs behave reliably. This addresses incorrect defaults some people hit in Python mode (#534).

Thanks @bereldhuin for reporting this.

Reliability and polish

Context menu / right-click handling is more robust, with fewer crashes in edge cases.
The measure tool again shows correct vertex indices when you need them.
Windows builds use the PythonSCAD logo in the application and nightly resources (#543, #544).

Documentation

The Python API cheatsheet and reference are brought to a complete state (PR #531).

Upstream changes

Of course we merged all changes from OpenSCAD into our codebase again to get the latest bugfixes and enhancement from our upstream project.

Downloads

Pre-built packages are available for Linux (AppImage, .deb, .rpm), macOS (DMG), and Windows (installer and zip):