Multipart3D. Split any 3D model for printing

Features/Area Cut

Area Cut

Cut only inside a rectangle or circle on the plane. Reshape a region without splitting the entire mesh.

Area cut with a rectangular window in Multipart3D

When to use it

  • You need to separate or reshape only part of a surface
  • A full planar cut would break geometry you want to keep whole
  • You are preparing a local insert, hatch, or removable panel
  • You want a controlled window for a connector or detail

How it works

  1. Load your model and open Area Cut.
  2. Place the plane, then size the rectangle or circle to the region you care about.
  3. Preview the bounded cut and commit when both sides look right.
  4. Export or continue with other tools (connectors, further cuts).
Area cut result with the windowed Benchy piece as its own part
Only the windowed region comes off. The rest of the hull stays one piece.
Detached area-cut piece moved away from the Benchy hull
Move the detached piece on its own, then drop it to the bed before you export.

Area Cut is a planar operation with a mask. Instead of slicing the whole model, only geometry inside the chosen shape on the plane is cut. That lets you make surgical changes without a full bipartition.

That matters for props, functional parts, and painted models where a global plane would be too aggressive. Everything still runs in the browser inside Multipart3D; your files stay on your device.

Tips

  • Start with a slightly larger window than you think you need, then tighten.
  • Combine with Smart Detach when the region is a distinct feature you can click.
  • After cutting, check that the new faces are printable or plan to sand/glue them.

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