2.9.0-alpha1 Fuzzy Skin and Seam Painting do not work together

[ex-nerd]

Description of the bug

When using the new paint-on fuzzy skin feature, it seems that seam configuration is ignored and defaults to … I'm not sure what. Placement of the seam on any layer with fuzzy skin is not where you would expect (confirmed with aligned, rear, and painted seams).

Project file & How to reproduce

Sample project:
fuzzy-skin-seam-painting-bug.3mf.zip

1. Add a random object
2. Paint a random area with fuzzy skin
   • 
3. Paint a seam in a specific spot
   • This isn't actually necessary but gives a good example. You can also see this effect with normal seam settings like aligned or rear.
   • 
4. Slice and turn on seam visibility
5. Notice that the seam is in an unexpected location for any layer that also includes fuzzy skin
   • 

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

2.9.0-alpha1

Operating system

MacOS 15.1.1

Printer model

Prusa XL 5 tool

[Jan-Soustruznik]

Hello, @ex-nerd , thank you for report. I created internal issue no. SPE-2576. We will try to fix in some next release. Have a nice day