Design for 3D-Printing

Question regarding two apparently conflicting bits of information:

- A: Fillet edges in the filament direction - B: Have a sharp edge for the seam.

How would you crack that nut, as A prevents B. For example, on a rectangular box, maybe fillet 3/4 of the corners, and leave the 4th sharp?

Some possibilities that come to mind:

1. not care about seam placement; or

2. place seams manually in the slicer; or

3. add a tiny V-shaped notch specifically for the slicer to put the seam there.

4. Use a scarf seam, which Bambu’s does if it can’t find a better option. Still visible, but much less so.

5. Use rear. The seam will be a single line down the back of the part.