github prusa3d/PrusaSlicer version_2.3.0-rc3
PrusaSlicer 2.3.0-rc3

3 years ago

PrusaSlicer PrusaSlicer 2.3.0-rc3


This is the third release candidate of PrusaSlicer 2.3.0, following 2.3.0-alpha1, 2.3.0-alpha2, 2.3.0-alpha3, 2.3.0-alpha4, 2.3.0-beta1, 2.3.0-beta2, 2.3.0-beta3, 2.3.0-rc1 and 2.3.0-rc2. This release fixes bugs found in previous release candidate and couple of old bugs as well. For the new features in the 2.3.0 series, please read the change logs of all the alphas, betas and rcs.

Unlike the alphas and the betas, the release candidate saves its profiles into PrusaSlicer directory, which is the same directory where the previous releases of PrusaSlicer (and the rcs) keep their profiles. If you were testing the PrusaSlicer 2.3.0 alphas or betas, your profiles from them would have to be manually imported into PrusaSlicer 2.3.0-rc3 by exporting and importing the Config Bundle.

Bugs fixed with respect to PrusaSlicer 2.2.0

  • Linux specific: Fixed long preset names in preset combo boxes overflowing at the left edge of the combo box. (#2898, thanks Ian McInerney from KiCad team)
  • Linux specific: Fixed eject of SD card or flash drive with spaces in its file system label. (#3975)
  • OSX specific: Fixed slow SD card or flash drive eject. (#4844)
  • Concentric infill is now always being printed outside-in. This is consistent with the original Slic3r and it has been broken in PrusaSlicer for a long time, optimizing the Concentric infill path for shortest travel. (#4948)
  • Linux, GTK2 bug workaround: File path text edit control in "Send G-Code to printer host" dialog was painted white on white after losing focus. (#4532)
  • Fixed drag & drop issues at the object list. (#5568)
  • Fixed a missing reslicing request after object settings were deleted. (#5606)
  • Fixed thumbnail generation: when a custom supports/seam painting was active during the export, the thumbnail only contained the instance being edited by the gizmo. This issue happened in PrusaSlicer 2.2.0 in SLA mode with support editing gizmo active, but it now became more pronounced with the introduction of the support and seam editing in PrusaSlicer 2.3.0. (#5690)

Bugs fixed with respect to PrusaSlicer 2.3.0-rc2

  • Fixed FDM auto-speed calculation in case ironing is used. Ironing extrusions are newly excluded from auto-speed calculation. (#5082)
  • OSX specific: Fixed SD card / flash drive eject from 2nd instance of PrusaSlicer. (#5507)
  • Fix of G-code Viewer not loading certain file extension. The Open file dialog offers to open files with the following extension: g, gcode, ngc and gco, but ngc and gco were incorrectly rejected when selected. The same has also been fixed for importing configuration from a G-code. (#5536)
  • Fixed a rare crash during loading of a 3MF. (#5550)
  • Fixed incorrect scaling of splash screen title on certain combination of scaled displays. (#5584)
  • Custom supports/seam paining did not work correctly on scaled objects. (#5632)
  • Fixed regression in coloring labels of the preset input fields after the preset input field gets modified by the user. (#5698)
  • Fixed regression in 3MF import / export: Fixed XML escaping of newly introduced file name metadata field. (#5577)
  • Fixed slow update when dragging the vertical slider in G-code viewer. (#5572)
  • Fix of 'fill bed with instances', which ignored possible rotation of the source object when creating the new instances. (#5621)
  • Enabled path planning optimization for the new Adaptive Cubic and Support Cubic infill types. (#5633)
  • Fixed a crash when slicing one-layer object with raft. (#5652)
  • GCode processor now accepts T-1 (set no extruder as active) as valid for RepRapFirmware and RepRap/Sprinter G-Code flavors. (#5677)
  • Fixed numerical issues with the new algorithm to connect infill lines with perimeters. (93a5906)
  • Fixed refresh of in 3D scene notifications. They only appeared / disappeared after the user moved mouse over the 3D scene.
  • Linux specific: Fixed freezing on Linux when run with non standard task affinity. (#5661, thanks @maximlevitsky)
  • Linux specific: Use monospace font when reporting errors in custom G-Codes, thanks @wavexx.
  • Windows specific: Iterating over presets at the preset combo box using the up / down cursor keys stopped working after Windows 2004 update. This should now be fixed. (#5531)


  • Minor fixes (e.g. #5672)
  • updated CZ, DE, ES, FR, IT, NL, PL
  • updated PT-BR translation, thanks @guipatriota

3rd party profiles

  • Added FLSun vendor and printer models FLSun QQS Pro and FLSUN Q5. (#5582, thanks @Foxies-CSTL)

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