Weird lines around object when supports are enabled

[RealSpyKitty]

Description of the bug

Turned on supports and all around the perimeter of a small gear appeared small scribbles that end up doing nothing.

Project file & How to reproduce

Tried to exclude the gear and slice it alone and was unable to reproduce this issue, here is the exact .3mf file that with the settings applied.

Version of PrusaSlicer

2.6.0 Alpha2

Operating system

Win 10 64bit

Was unable to upload the .zip so here is the file.

Gears.rar.txt

[neophyl]

When I opened your project it was set to organic supports which didn't express the issue you pictured. The only option that did was to use Snug type supports. When that is selected you do get the thin dark green support base perimeters pictured. This is because you have support on build plate only selected. It draws the base of where it will put the support but then as its calculating the support for the higher layers it cant actually create any with the parameters you have configured.

There's no second pass of the slice processing to remove anything superfluous so the green bottom interface for the support is left there. SO you can either turn the supports off (as they aren't being generated anyway) or different support settings will remove it. For example changing I changed pattern spacing to 1 and xy separation to 50% as well as closing radius to 0.25 and it didn't generate it. However that's a side effect of the fact that the support it would be needed for wouldn't have extended out as far. So when the support isn't generated (due to the support on build plate option) you dont get the lines left behind.