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Process › Strength› Top/bottom shellsbottom_surface_pattern

Bottom surface pattern

In Bambu Studio, the profile 0.20mm Standard @BBL A1 sets it toMonotonic

The pattern the lines make on the face that touches the plate. On a textured plate you barely notice it; on a smooth plate, “Monotonic” gives the most even face.

How it works

The first layer gets pressed against the plate and copies its texture: on a textured plate, the line pattern is barely visible. On a smooth plate you can see it, and there it pays to use a pattern that doesn't leave marks at every change of direction.

“Monotonic” (the default) prints every line in the same direction. “Rectilinear” goes back and forth, and is a bit faster. The rest are decorative.

When to change it

  • Any part printed on a textured plate: it doesn't matter, leave “Monotonic”.
  • A coaster or a fridge magnet printed on a smooth plate, with the bottom on display: “Monotonic”, or “Concentric” if the base is round.
  • A decorative plaque that hangs on the wall and whose back face also shows: “Hilbert Curve” or “Archimedean Chords”.

Typical values

ValueWhat for
MonotonicDefault; even basedefault
RectilinearA bit faster
ConcentricRound bases
Hilbert / Archimedean / octagramDecorative

Watch out for

  • The first-layer pattern affects how well it sticks to the plate: the decorative ones, with lots of turns, stick a little worse.
  • It doesn't change areas printed in mid-air, like the ceiling of a hole (bridges): those have their own settings.

Goes well with

What Bambu Studio says

Line pattern of bottom surface infill, not bridge infill

Bambu Studio tooltip for this setting · AGPL-3.0

Read more at the official source