You should be able to select the interface material sperately from anything else.
Currently the interface material is the same material as the outside perimeter. I checked both the preview, and the gcode, it is printing the interface with T0 in my example below.
Why is this useful?
It would make much sense to be able to pick this material separately, to reduce the cost of high cost soluble, and breakaway materials.
- Do other slicers do this?:
Top gcode preview example is the top layer of interface, seen as T0.
Bottom gcode preview example is the first layer above the interface.
Included in image is the material settings, showing everything should show as “green”, except outside perimters.
EDIT: Version 0.6A