Digital geometry and path health

What you are trying to accomplish

Represent the original boundary with a closed, smooth, economical digital path that retains deliberate corners and straight sections.

Why it matters

An outline made from many tiny corrections may look acceptable at one zoom level but print with bumps, spikes, gaps, or awkward seam allowance. Good geometry follows the design’s structure instead of tracing every photographic imperfection.

Needs cleanup

Smooth and closed

Step by step

1. Place points at real corners and meaningful changes in direction.
2. Use straight segments where the source is straight.
3. Use smooth curves through stable portions of curved edges.
4. Close the outline without leaving a tiny gap or overlapping the first segment.
5. Inspect the piece at normal size and close zoom.
6. Check for self-crossings, unexpected sharp turns, and clusters of points.
7. Run Path Health and repair every issue that changes the intended boundary.

What success looks like

The outline is closed, does not cross itself, preserves intended corners, and uses enough points to hold the shape without becoming lumpy. Added seam allowance follows it cleanly.

Common problems and recovery

• Lumpy curve: remove unnecessary points, then adjust the remaining curve.
• Corner became rounded: mark the controlling point as a corner and inspect both adjoining segments.
• Tiny opening at the start point: use the close-shape action rather than placing another nearly identical point.
• Seam allowance spikes: repair the base outline first; do not hide the symptom by editing only the allowance.
• Auto-Detect produced noise: keep only trustworthy candidates and trace the uncertain area manually.

Quick safety check

Temporarily hide the source photo. The path should still read as a deliberate pattern edge, not a record of image noise.

Related tools and next step

Use Trace a pattern piece and Adjust shape and Path Health.