Form, Mirror, Flip, Align and Lattice

Use this when: you want to cut a hole, paint a shape onto a surface, keep only an overlap, build a symmetric model, flip or line up objects, or fill a shape with a lattice.

Don't use this for: blending shapes or changing their order. Read Shapes and Goop, and Scene list.

Form

Form sets how an object combines with the objects above it in the same area or union. Find it in the Object tab of the inspector, or in the right-click menu. Shapes, curves, text and unions have Form. Areas do not.

A Negative sphere selected, with its Form settings and Goop.

Rules:

• Form works only inside one area or union. See Scene list.
• The first object in an area or union can only be Positive. The other buttons are greyed out.
• Intersect is not available for curves or text.
• Stain and Intersect need Pro. Without a Pro plan, Womp asks you to upgrade. With a Pro plan in a project that is not Pro, Womp asks you to upgrade the project. See Credits and plans.

Material Residue

When the form is Negative or Intersect, the Material Residue checkbox appears. Turn it on to leave the object's material on the cut surface. It does not work on the first object in an area or union.

Example: a ring

1. Add a Cylinder.
2. Add a smaller Cylinder in the same area, below the first one in the list.
3. Set the smaller one to Negative.
4. Move it through the centre of the first cylinder. It cuts a hole.

Mirror

Mirror reflects an object across a plane. It works on shapes and curves. Find it in the Object tab.

1. Click + (Add new mirror plane) next to Mirror. You can add up to 4 mirror planes.
2. Click a plane in the list to open its settings:
   • Plane Axis: X, Y, Z or Custom.
   • Plane position: where the plane is.
   • Plane rotation: the angle of the plane. Only for Custom.
   • Goop: blends the object into its reflection, so the seam is smooth.
   • Show plane: shows the plane on the canvas.
3. Use the eye button to hide a plane, and the trash button to delete it.

Each plane reflects the object and the reflections made by the other planes. Two planes at right angles give 4 copies in total. Three give 8.

One mirror plane on the X axis, with its axis, position, Goop and Show plane settings.

Some older projects show a simpler Mirror section instead: turn on X, Y or Z under Axis, set a Goop value for each axis, and use Show plane. If the object moves behind its mirror plane, click Move back to visible.

Flip

Flip turns the selected objects over along one axis. The object is replaced by its flipped version. Mirror is different: it keeps the original and adds a reflection.

• In the Object tab, click X, Y or Z next to Flip.
• Or right-click the object and choose Flip, then X axis, Y axis or Z axis.

Flip mirrors the selection along X, Y or Z.

Flip works on shapes, curves, text, meshes, fields, SVGs, stickers, groups, unions and areas.

Align

Align lines up two or more selected objects inside their shared bounding box. Select the objects. The Align section appears in the Object tab.

The directions follow your current camera view, not fixed world axes. Hover a button to see the plane it aligns to.

The Align section with two objects selected: three rows of three buttons.

Lattice

Lattice fills a shape with a repeating inner structure. It is a Pro feature and is marked alpha.

1. Select a shape, curve, union or area.
2. Open Functions in the editor toolbar and choose Lattice. It is in current (v2) projects only.
3. Turn on Lattice and pick a type: Gyroid, Schwarz, Diamond, Octet Beam, BCC Beam, Cubic Beam or Spheres.
4. Set Position, Rotation, Scale (cell size), Thickness (strut thickness) and Wall Thickness (outer shell).
5. For round shapes, turn on Polar Transform and set Polar Repetitions.

The Lattice panel before you turn it on. The settings unlock when Lattice is checked.

To print a lattice, check the strut and wall sizes against Design rules.

Use instead

• Wrong move: setting the first object in an area or union to Negative. Why: there is nothing above it to cut, so only Positive is available. Right move: put the shape you want to cut first, and the Negative object below it.
• Wrong move: using Flip to make the other half of a symmetric part. Why: Flip replaces the object, so you still have only one half. Right move: add a mirror plane with Mirror.
• Wrong move: offering Stain, Intersect or Lattice to a Free user. Why: all three need Pro. Right move: use Negative or Goop, or see Credits and plans.

Last checked: 2026-11-10. Womp version: Womp web app, November 2026.