Plane Cut

Plane Cut slices an object with a construction plane and keeps the part behind it – everything on the far side of the way the plane faces. The cut surface is capped with a flat face, so the result is still a solid you can go on building with.

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How to Use

  1. Select an object
  2. Apply the Plane Cut operation from the Reshape menu
  3. Put the plane where you want the cut – drag its handles in the viewport, or type the values into the Plane row

The plane starts level, facing up, 10mm above the object’s own zero, which is where the old Cut Height slider started.

The Plane

The Plane row is the construction plane the cut is made on:

  • XY / XZ / YZ – the three level and upright presets. Custom opens the values for editing
  • Flip – turns the plane around, so the half that was thrown away is the half that is kept
  • Pick Face – click a flat face on any model in the scene and the plane lands on it
  • Plane Values – Origin (where the plane sits), Normal (which way it faces, and so which side is cut off) and X Direction (how the plane is spun within itself; it makes no difference to a cut)

In the viewport the selected Plane Cut draws its plane over the part, and the standard selection handles edit that plane rather than the operation: the up arrow moves the plane up and down in world Z, and the three curved rotate arrows tilt it. The Plane row follows along - the tab flips to Custom as soon as the plane is tilted, and Origin Z tracks the arrow. Every value can also be driven by an expression.

Tips

  • Use Plane Cut to flatten the top of a model at a specific height, or to trim an imported model down to a flat base
  • A tilted cut is direct: turn the plane, do not rotate the object
  • For cutting with a non-planar shape, use Subtract with another object instead
  • To get the cross section itself as a 2D path instead of a cut solid, use Slice to Path