Rectangle Mode

Rectangle Mode edits a flat rectangular region on the active voxel plane.

It is useful when the result should stay planar rather than extend into depth, such as flat walls, panels, planar selections, or broad paint and material passes on one plane.

Why This Matters

Box Mode is useful when an edit should have depth.

Rectangle Mode is different. It stays on one plane, which makes it better for flat edits and planar workflows.

Use it when you want width and height, but not depth.

How Rectangle Mode Works

Rectangle Mode edits a flat rectangular region on the active voxel plane.

To use it:

1. Move the cursor over a voxel face.
2. Click to set the first corner.
3. Drag to define the opposite corner on the indicated plane.
4. Release the mouse button to apply the active tool.

The active tool is applied only to the flat area defined on that plane.

The Planar Cross

When you hover over a voxel face, Foxel shows a planar cross.

That cross indicates the slice on which the rectangle will be created.

This is important because Rectangle Mode is tied to a plane, not a full 3D volume.

If the target slice is not the one you expected, move the cursor to a different face or adjust the view before drawing the rectangle.

Shape Option

By default, Rectangle Mode processes the full rectangular area.

You can also choose a different 2D shape in the Toolbar.

Available shapes include filled and outline variants of:

• Rectangle
• Ellipse
• Triangle

The active tool is then applied only to the voxels that belong to the selected shape.

For example, this lets you use the same planar workflow for rectangular panels, circular shapes, triangular forms, or outline-only edits.

When To Use Rectangle Mode

Use Rectangle Mode when the edit should stay flat on one voxel plane.

It is useful for:

• Flat walls and panels
• Planar selections
• Broad paint passes on one plane
• Broad material passes on one plane
• Flat cutouts or filled planar shapes
• Outline shapes on a voxel surface

Choose it when the result should stay planar rather than extend into depth.

How It Differs From Box Mode

A simple distinction is:

• Rectangle Mode edits a flat 2D area on one plane.
• Box Mode edits a 3D volume with depth.

Use Rectangle Mode when the edit should stay on one slice.

Use Box Mode when the edit should occupy a full volume.

What To Remember

• Rectangle Mode works on the active voxel plane.
• Hover over a voxel face to see the target slice.
• Click the first corner and drag the opposite corner.
• The result stays flat.
• Alternate 2D shapes are available in the Toolbar.
• Use it for planar edits, not depth-based volumes.