neophyl
commented
2 weeks ago Its the thin edges of your model. You are using Arachne in your project. It doesnt seem to like thin curved edges, as shown in this previously reported issue https://github.com/prusa3d/PrusaSlicer/issues/11463
The Arachne settings are ok general purpose but are not a 1 set fits all solution. You are expected to adjust settings based on your geometry.
You have 2 options. You could change the slicing to the Classic mode. which will give you this - ( I also turned off thick bridges)
or you can adjust your arachne settings (expert level settings on Advanced>Arachne perimeter generator)
Changing the Perimeter transitioning threshold from the default 10 to 20 gives some improvement (but not as good as Classic imo)
While you can fiddle around with the other Arachne parameters its just easier to switch back to Classic mode.
Description of the bug
I'm making a small headlight attachment plate for a bike helmet. The small details becomes a choppy mess after slicing.
My settings are: 0.15mm OPTIMAL Generic ABS Original Prusa i3 MK2.5S - 0.6 nozzle 100% infill
Project file & How to reproduce
WeirdSlicing.zip
Use the settings I supplied above and slice the model.
Checklist of files included above
Version of PrusaSlicer
PrusaSlicer-2.7.4
Operating system
Windows 11
Printer model
Original Prusa i3 MK2.5S (0.6 nozzle)