For example this is a basic hollow square..
Prince absolutely perfectly other than the " zigzag infill" which seems to over extrude.
I can of course manually set infill four layers which are not "solid".
For example this is just 10% infill.
But I do not seem to see or have any control over how this "fill" is set on the bottom layer ?
The only thing I can really do is not have any solid top or bottom layers ?