disable bridging for first layer on support interface material

[Berioldir]

Is there an existing issue for this feature request?

• I have searched the existing issues

Is your feature request related to a problem?

when using support with an dissimilar interface material (for example a PLA print with PTEG interface material) I usually use a completely closed interface surface by setting "top interface spacing" to 0 and also setting "top Z distance" to 0. So my interface surface COULD act as a kind of build plate.
Unforunately, the slicer is always using "bridging" for the first layer on the interface surface, so the bottom surface at this location of the part looks bad, looks like a classic underextrusion (since this what bridging seems to be about).

Instead, the parts downside surface lying on the support interface could almost look as good as the first layer on the build plate!

Which printers will be beneficial to this feature?

All

Describe the solution you'd like

An option for the first layer on support interface to force the slicer to use the same print parameters that are used for the first layer on build plate.

Describe alternatives you've considered

No response

Additional context

No response

[Noisyfox]

Interesting idea, I'll see if this could be done.

[Berioldir]

And I also would change the recommendation for the interface pattern from "concentric" to "rectlinear" when changing the interface material.
"Concentric" often leads to a gap in the interface. Using the same print parameters as for the first layer (on build plate) then would fill this gap and therefore create an uneven surface.
This won't happen with "rectlinear"... actually I'm wondering why "concentric" has been chosen as recommendation in the first place.