Offset with shared border

I am starting out with Lightburn. While I think I already mastered the basics, I have some questions that I cannot really find answers to.

As a test project, I would like to cut out this flower in the pot. I figured out how to separate external lines for cutting from inside lines that will be engraved/filled. As you can see in the attached image, I am trying to fill the leaves(but not the middle one). I have set the offset to get some border and not fill them all the way to the edges. But on the inside (image 2) I get double offset since both fill areas come together. So I wonder what would be the easiest way to remain the same offset width around all the edges.

image

Another question that popped up: if I want to fill the area all the way to the edge, is the process to achieve that to have two overlapping layers, one set to line and cut, the other set to fill? Or is there a better way for this type of work?

Thank you!

It’s difficult to tell from your current screenshots. What did this look like before doing the offset?

This is a perfectly valid way of doing it. Another strategy is to use the concept of sub-layers. Within the same layer you can define multiple operations. So you could do a “Fill” and then a “Line” operation in sub-layers to get the effect that you want.

Great, thank you for your reply.

Here is a screenshot of the outlines without offset. So looking at the first screenshot, the offset on the joint border is doubles. Is there a way to keep the same width also on the inside part?

image

I’m increasingly confused as it’s not apparent to me what your geometry is that’s leading from one to the other.

Can you upload the .LBRN file here for review? I’d like to take a closer look.

Sure, here you go:
test-file.lbrn2 (43.0 KB)

I have the offset on the outside lines already but would like to add it to inside lines of the same width.

Okay, it seems you’ve made additional changes to the design. I’m not clear on what your final intended shape is based on that.

What specifically are you referring to as outside vs inside lines?

Can you create a mockup of what you expect this to look like at the end?

Some notes and questions based on what I’m seeing:

  1. What is the purpose of blue C19 layer? It has a number of disparate line segments. Typically that will lead to problem scenarios but want to confirm what function that layer serves. Based on what I can infer it seems like that layer may represent the non-shaded portion of each leaf. If so, I suspect you’d be better off having a single closed shape for the whole of the non-shaded side. Essentially the opposite shape of each shaded area.
  2. This seems to incorporate a different engraving design than the first screenshot where only half of each leaf is engraved vs the entire leaf minus the center one. Is this a deliberate shift? Want to make sure that your stated intent has shifted from the initial post.

Hopefully, I will manage to explain with the help of the image below.

What I am trying to do, is to have the offset of the same width around these shapes that I want to fill. As you can see in the photo below, the two single yellow offset become double-width offset (blue lines), once they join together. So I would like to find out if there is an approach that would enable me to have the part of the offset, circled in blue, the same width as the offset in yellow.

Thank you for your help, I hope I managed to clear some doubts

There wouldn’t be a single command that can somehow do this.

However, a series of boolean operations with offset could be used to get you there.

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