I noticed in one of the forum posts I linked above, that @CanDo said:
I looked into this feature, it is available in developer mode. The interface shells option only works if the letters are a different color than the base model, otherwise it just prints it the default way.
I tested the interface shells option in Bambu Studio. As a reminder, this is what happens to the top surface under normal settings without my fix or Bambu’s interface shells.
For interface shells, it adds a wall around the letter and fills in the the top surface under the letter like the picture below.
This is how the top surface looks when printed. I am showing two pictures to highlight different defects.
Here is a comparison of the three methods. The picture on the left is my technique, the middle one is Bambu’s interface shells and the third one is the Bambu Studio’s default handling of text. I added two pictures to highlight the differences.
Other than the normal FDM imperfections, my version is flawless. Bambu’s interface shells version seems to lessen the prominence of the defects a little but they are still noticeable. Also, the default version has one additional defect on the top left that is not visible in the interface shells version. The additional defect is definitely a more problematic defect, so interface shells will likely eliminate the worst defects that people experience, but not all.
Bambu’s interface shells version is still in development, but unless they make the top surface solid and uninterrupted like mine, I don’t think there will be a significant improvement to the defects that still exist.