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Converting outlines to curves creates imprecise curves

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To reproduce:
1. Draw a few small circles inside each other. The smaller they are the more noticeable the problem becomes.
2. Add outlines.
3. Convert outlines to curves.

See the attached screenshot.


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It looks as though your ‘outlines’ are strokes which you’re expanding (via the ‘Expand Stroke’ command) to create filled shapes. If that is indeed what you’re doing, the problem you’ve described is a known issue. As you’ve observed, the larger the objects the less noticeable the problem, so the workaround is to enlarge the objects, expand the strokes and then shrink the objects back down to their original size.

In this particular case the strokes are circular, so you can achieve the desired end result more quickly and accurately by drawing the desired shapes with the Donut Tool.

Alfred online2long.gif
Affinity Designer/Photo/Publisher for Windows 1.9.1 • Windows 10 Home (4th gen Core i3 CPU)
Affinity Photo for iPad 1.9.1 • Designer for iPad 1.9.1 • iPadOS 14.4.2 (iPad Air 2)

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Hi Alfred,

Thank you for your reply. Sorry, "converting outlines to curves" is CorelDraw-speak. You are right, I am referring to converting strokes to filled shapes. Your suggested workaround works, but of course the imperfection is still there, only less noticeable. For designers who are a little OCD about these things it is still a problem, even if clients are unlikely to notice.

The Donut Tool is a good solution for this case, but the circles were used only to demonstrate the problem.

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