Invert Engrave or Fill

[swindmiller (Scott Windmiller)]

I read all the posts about inverting a fill or engrave but I am not getting the result I want.
I used the Intersect feature to “overlay” an image on another, worked great. I can’t figure out how to invert what is being filled. I read everything on how to draw a box around the image but for the life of me I cannot figure out how to get the result I am looking for. Basically, I want the white to fill as opposed to the black.

Sorry for the newbie question

Scott

[AlanRichard (Alan Csizmazia)]

You want the cobweb to be black?

You’re on the right track drawing a box around the image. Make sure its on the same layer and the layer is set to fill

If you don’t want a black edge (as above) I think you will have to close the open line segments and open the closed lines at the edge
-a

[Stroonzo (Jeff)]

I’d suggest using the offset tool. And just as @AlanRichard mentioned, the offset should be on the same layer.

During this demonstration of Booleans, the scan logic is mentioned:

LightBurn Demo - Booleans

[Rick (Technical Evangelist)]

Here is a good description of how LightBurn uses boundaries to define the area to be filled.

How do I invert (negate) a vector engraving?

If you want to invert a vector engraving (Fill layer) you need to add an outline to it. Think about what happens when you scan a circle, compared to the letter ‘O’. The inner ring of the O toggles the fill. If you add another shape (like a square) outside it, it negates the whole thing: [image] And a slightly different example, this time done by changing the outer line around the design to a ‘Line’, instead of leaving it as part of the Fill layer: [image] In the case above, the design alr…