How do I invert (negate) a vector engraving?

[Rick (Technical Evangelist)]

Here is another example on this topic to help illustrate how LightBurn determines which object shapes to fill.

Etching Problem

Shiloh Snowman.lbrn (979.3 KB) I am using 1/4" clear acrylic with paper of face to make this ornament. The first etching is to allow me to paint the hat, eyes, buttons black. The next removes paper for nose to be orange. The last etching is to frost the body of the snowman. Here is the problem. When I do the last etching to frost the body of the snowman, it goes over the buttons and eyes, removing the black I painted in the first place. Is there a way to keep the last etching from going ov…