Fixed: slicer reset layer height and print settings when opening TailWag .3mf exports

[everyday3d]

Issue: #52, fixed in 6575104 (on main, not yet in a release).

What went wrong

When an exported .3mf was opened in Bambu Studio or OrcaSlicer, the slicer threw away TailWag's print settings and used its "0.20mm Standard" preset instead: 0.20 mm layers instead of 0.08 mm, and the 100% infill, shell, wall and prime tower settings reset too. A filament painting meant to print in about 30 thin layers sliced as about 12 thick ones, so the colours came out wrong, often mostly one colour.

How to tell if you were affected

Open an exported .3mf from TailWag 1.2.0 or earlier in Bambu Studio and look at Process > Quality > Layer height. If it shows 0.20 and the Quality tab is not highlighted as changed, the settings were reset. Until the next release you can set layer height to 0.08 mm, first layer to 0.16 mm and sparse infill to 100% (aligned rectilinear) by hand before slicing.

Root cause

Bambu Studio and OrcaSlicer only keep a project setting if it is listed in different_settings_to_system[0] in Metadata/project_settings.config. Anything not listed is reset to the system preset when the project opens. TailWag wrote the right values but only listed three settings (infill pattern and two support settings). The list also had a fixed length that only matched 4-filament projects.

Fix

• All layer and pinned settings are now written and listed as project overrides, with the list sized to the number of filaments.
• The same fix applies to the TD calibration plate export.
• Export verification now blocks a file where a pinned setting is not listed, so this cannot slip back in.
• Confirmed in Bambu Studio: the project opens at 0.08 mm with the Quality tab marked as changed.