[5.6.0] Inconsistent and/or missing support interface, voids in support, and spurious supports #18748
Description
Cura Version
5.6.0
Operating System
Windows 10
Printer
Ender5
Reproduction steps
Support interfaces are broken in multiple ways. Open the attached project, change Use Towers and Minimum Support Interface Area to different values to reproduce all mentioned variations.
Actual results
Number of generated support interface layers are inconsistent. Changing Minimum Support Interface Area changes how many layers of interface are generated. With some minimum area values, spurious interface layers are generated in the middle of the support, and with other values, there are missing layers in the middle of the support. With Use Towers enabled, spurious supports are generated where there isn't any material to support.
Expected results
Support interface layer count should be either 0 or Support Interface Thickness / Layer Height, shouldn't be any missing layers, or interface layers mid-support. There should be no supports generated where there isn't anything to support.
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-
Towers off:
With
Minimum Support Interface Area= 5mm2
With
Minimum Support Interface Area= 7mm2
With
Minimum Support Interface Area= 10mm2
With
Minimum Support Interface Area= 20mm2
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Towers on:
With
Minimum Support Interface Area= 5mm2
With
Minimum Support Interface Area= 7mm2
With
Minimum Support Interface Area= 10mm2
With
Minimum Support Interface Area= 20mm2
