PartDesign SubtractiveLoft

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PartDesign SubtractiveLoft.png PartDesign SubtractiveLoft

Menu location
Part Design → Subtractive loft
Default shortcut
Introduced in version
See also
Additive loft, Subtractive pipe


Subtractive Loft creates a subtractive solid in the active Body by making a transition between two or more sketches (also referred to as cross-sections). Its shape is then subtracted from the existing solid.

introduced in version 0.17

How to use

  1. Press the PartDesign SubtractiveLoft.png Subtractive loft button.
  2. In the Select feature dialog, select a sketch to be used as first cross-section and click OK.
    • Alternatively, a single sketch can be selected prior to pressing the Subtractive loft button.
  3. In the Loft parameters, press the Add Section button.
  4. Select a sketch in the 3D view. Repeat to select more sketches.
  5. Set options if needed and click OK.


  • Ruled surface: makes straight transitions between cross-sections. Dos not apply to a loft with two cross-sections. If not checked, transitions will be smooth.
  • Closed: makes a transition from the last cross-section to the first, creating a loop.
  • Press the Remove Section button to remove a sketch, by selecting it in the 3D view.


  • DATALabel: name given to the operation, this name can be changed at convenience.
  • DATASections: lists the sections used.
  • DATARuled: see Options.
  • DATAClosed: see Options.
  • DATAMidplane: N/A
  • DATAReversed: N/A
  • DATARefine: true or false. If set to true, cleans the solid from residual edges left by features. See Part RefineShape for more details.


  • Sketches must form closed profiles.
  • It is not possible to loft to a vertex.
  • A cross-section cannot lie on the same plane as the one immediately preceding it.
  • To better control the shape of the loft, it is recommended that all the cross-sections have the same number of segments. For example, for a loft between a rectangle and a circle, the circle may be broken down into 4 connected arcs.