The "Ensure vertical shell thickness" checkbox behavior seems to be inverted

[Jojo90000]

Bug description I think that the "Ensure vertical shell thickness" checkbox behavior is inverted.

Expected behavior

• When checked, the "Ensure vertical shell thickness" feature should create a filled surface printed near (or behind) slopping walls, to increase the density of these walls, and be used as a support for the walls of the next layer.
• When unchecked, the slopping walls should be printed directly on top of the infill area of the previous layer. But in the 2.3.57.12 this behavior is inverted : when checked, no filled surface is created behind slopping walls ; And when unchecked, these surfaces are well created.

!!>> Project File <<!! Each time I try to upload the ZIP file, an error message is displayed : "Something went really wrong, and we can't process that file. Try again."...

To Reproduce 1/ Go to "Print Settings" / "Perimeters & Shell" 2/ In "Quality" tab, check/uncheck the "Ensure vertical shell thickness" the checkbox 3/ Slice the famous 3DBenchyBoat, and look at the deck part of the Benchy :

• When checkbox is checked : no filled surface is created behind the slopping wall forming the deck, and the next layer walls will be printed directly on top of the infill of the previous layers.
• When checkbox is unchecked : a filled surface is created behind the slopping wall forming the deck, and will be used as support for the next layer walls.

Screenshots

Desktop (please complete the following information):

• OS: Issue present on Windows 10 and macOS Catalina (tested in 2.3.57.12 on both OS)
• Version : 2.3.57.12
• Printer model : FLSun Q5 and Artillery Sidewinder X1

Additional context Nothing more ;)

[Jojo90000]

Oh, just a last thing : you just did an INCREDIBLE job with SuperSlicer, and I want to thank you for the the 3D printers community : you probably made the best actual slicer (and when I say that, I'm used to work with S3D, Cura and IdeaMaker). So, congratulations to you, and thanks a lot, really ! ;)

[Jojo90000]

Ok, got it : it is the "No solid infill over" option that must be set to a bigger value than 2 ! I think that you can close the defect. Sorry to disturb for nothing... :s