How to Invert a Vector Engraving

Inverting a vector engraving in LightBurn is a simple process once you understand how the software calculates "fills".

The Concept of Fills

LightBurn determines what to fill based on closed shapes (continuous loops). * Single Closed Shape: The laser engraves everything inside that shape. * Nested Closed Shapes: When you place one closed shape inside another on the same layer, LightBurn toggles the fill. Instead of filling everything, it only engraves the space between the outlines.

How to Invert Your Design

To invert a graphic, you simply need to place an outline around it: 1. Create an Outline: Draw a shape (like a rectangle or circle) around the graphics you want to invert. 2. Same Layer: Ensure both the original graphic and the new outline are assigned to the same Fill layer. 3. Result: The area that was previously empty will now be engraved, and your original shapes will remain as "islands" of unengraved material.

Using the Offset Tool

One of the quickest ways to create an organic outline around your shapes is by using the Offset Tool: * Distance: Specify how far the outline should be from your original shape. * Corner Style: Choose between rounded, beveled, or sharp corners. * Selection: You can choose to offset all shapes or just the outer ones.

Important Requirements

• Closed Shapes Only: This process only works with closed shapes. Open shapes (where start and end points do not meet) cannot be filled.
• Avoid Layer Mismatch: If the outline and the graphic are on different layers, the laser will engrave both entirely, leading to overlapping areas being engraved twice instead of inverting.

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Source: LightBurn Software Official Tutorials