Knife Project

Reference

Mode

Edit Mode

Menu

Mesh ‣ Knife Project

Knife projection is a non-interactive tool where you can use objects to cookie-cut into the mesh rather than hand drawing the line. This works by using the outlines of other selected objects in Edit Mode to cut the mesh along the view axis, resulting geometry inside the cutters outline will be selected. Outlines can be a wireframe or boundary edges (i.e. the unconnected edges of a mesh).

Note

The primitives, being manifold objects, do not have wireframe or boundary edges. In the case of the cube, deleting the top face will result in cutting edges.

Select Non-Manifold (Wire, Boundaries) will highlight the cutting edges of mesh objects.

To use Knife Project, first while in Object Mode, select the cutting object then add to that selection with Shift-LMB the object to be cut. Now, enter Edit Mode and choose Mesh ‣ Knife Project.

Hint

3D Viewport Alignment to adjust the projection axis.

Options

Cut Through

Projects the cut through the entire mesh.

Examples

Before projecting from a text object.	Resulting knife projection.
Before projecting from a mesh object.	Resulting knife projection (extruded after).
Before projecting from a 3D curve object.	Resulting knife projection (extruded after).