This setting is grayed out when Arachne is selected as perimeter generator. But it still works (affects slicing), if you enable it prior to switching perimeter generator settings.
It looks like a visual bug and the setting does not have to be disabled to reduce confusion.
Project file & How to reproduce
This model slices correctly (with no perimeters around the bridge) both with arachne and classic perimeter generator, if "No perimeters on bridge areas" setting is set to "keep only bridges"
bridge.zip
What happened?
This setting is grayed out when Arachne is selected as perimeter generator. But it still works (affects slicing), if you enable it prior to switching perimeter generator settings.
It looks like a visual bug and the setting does not have to be disabled to reduce confusion.
Project file & How to reproduce
This model slices correctly (with no perimeters around the bridge) both with arachne and classic perimeter generator, if "No perimeters on bridge areas" setting is set to "keep only bridges" bridge.zip
Version
2.5.59.12
Operating system
No response
Printer model
No response