Slicing inconsistencies between 1.41.2 and 1.42.0 Alpha

[cosmith71]

Version

1.42.0 Alpha 5 (also present in other 1.42.0 versions)

Operating system type + version

Windows 10 Home

Behavior

This file is sliced differently (and looks worse) by 1.42.0 vs 1.41.2. The file is admittedly challenging, but it used to work fine. Other objects in this design show similar results.

File attached.

Hub_90mm_v1.0.STL.zip
1.41.2

1.42.0 Alpha 5

Project File (.3MF) where problem occurs

Hub_90mm_v1.0.3mf.zip

[cosmith71]

EDIT: This is an older version of the stl than is currently posted. The new version doesn't have these problems, but the slicing difference on the old version is still noteworthy.

[bubnikv]

There was a change introduced into Slic3r 1.42.0 series to fix issues #520 #820 #1029 #1364.
It was found out, that there are many STLs out there with thin cracks, gaps and slits, that the Slic3r 1.41.3 and older closed without asking. In the upcoming Slic3r 1.42.0-alpha5, we reverted to the old behavior with the default closing radius of 0.049mm, while providing a new parameter "slice_closing_radius" to satisfy the needs of #520 #820 #1029 #1364.

Closing.