Slicing "hangs" with support material extrusion width <0.2

[jasonleach-dev]

Description of the bug

When using 0.08mm layer height on my 0.4mm nozzle profile organic supports works fine. This is with default extrusion of 0.4mm and support extrusion 0.36mm. All other widths default.

When using the exact same* profile but with a 0.2mm nozzle (*associated extrusion width is altered to 0.2mm / 0.18mm and machine nozzle width of 0.2mm) the slicing hits "70% generating support material" and does not complete. CPU is still processing at 10-30% usage for 30+ minutes. Adjusting the support extrusion width to 0.2mm supports generate fine.

Project file & How to reproduce

reproduction.zip

Checklist of files included above

• [ ] Project file
• [ ] Screenshot

Version of PrusaSlicer

Version 2.6.0-alpha2+win64

Operating system

Windows 11

Printer model

Ender 3v2