Laser cutting vs engraving vs scoring: which SVG structure to use

You drop an SVG into your laser software, pick an operation, and the result is not what you expected: a score that runs around both sides of every line, a cut that slices a drawing into slivers, or an engrave that skips half the design. In almost every case the machine is doing exactly what the file tells it. Laser cutting vs engraving vs scoring is less about power settings and more about the structure of the SVG. This guide matches each operation to the file structure it needs.

Three operations, three ways of reading a file

Laser software (Glowforge, LightBurn, xTool Creative Space and similar) generally offers three kinds of operation. They look at the same SVG in very different ways.

• Cut is a vector operation. The laser travels along each path at high power and goes all the way through the material. It needs closed outlines around the parts you want to drop out.
• Score is also a vector operation, at low power. The laser follows each path once and marks the surface without cutting through. It is ideal for fold lines, fine details and line drawings.
• Engrave is usually a raster operation. The head sweeps back and forth and burns in the areas that are filled. It needs shapes with an inside to fill. Many programs only fill closed shapes, so an open line may be ignored or treated as a line by a fill operation.

The key point: a vector operation follows the path itself, not what the line looks like. If a "line" in your file is really a thin filled outline, the laser follows its boundary, which means both edges.

Why scoring gives you double lines

This is the most common complaint in laser forums. Someone traces a drawing, sends it to score, and every stroke comes out as two parallel lines. Threads on the Glowforge forum and the LightBurn forum describe exactly this. The cause is an outline trace: the tracer drew around each dark line instead of down its middle, so each mark is a narrow closed shape with two edges.

The fix is a file made of centerlines, meaning a single path running down the middle of each line. In SVG terms that is a stroke: a path with a thickness setting. The laser ignores the thickness and follows the path once. For a deeper explanation, see Why your cutter or plotter draws double lines.

Mountain and sun as thin real strokes: each line is one path, so a score passes over it once.

The same mark as a filled cut-out shape: a white mountain line inside a solid disc, ready to cut or fill engrave.

Matching LineSVG output types to laser operations

LineSVG asks you to choose an output type before generating, and that choice decides the structure of the file.

• Cut-ready shapes produces closed filled shapes with connected parts. Send it to cut for ornaments, signs, cake toppers and stencils, or to engrave for a solid burned design.
• Editable lines produces real SVG strokes. Tiny solid accents such as dots may remain fills; if you score the file, those small fills will be traced around their edge, which is usually harmless.
• Pure lines (for machines) is a switch under Editable lines that forbids any filled element, so every mark is a single path. Use it when the whole design must be scored or line engraved without surprises.

After generation, LineSVG labels the result with its share of real strokes, for example "Editable lines · 92%" or "Contains filled shapes · 20% lines". A high line share is what you want for scoring; for cutting, a filled result is the right outcome.

If your laser software assigns operations by color, Color layers can also help: it groups flat shapes by color, so each color group can be sent to a different operation.

Practical tips for cut files

Getting the structure right is the first step. These habits make the cut itself go smoothly.

1. Keep parts connected. Anything that is not attached to the main shape falls out when it is cut. The center of an O, the eye of a bird or a floating star will drop away unless it is joined. Cut-ready shapes are generated with connected parts, and the cake topper discussion on the Glowforge forum shows why connected script text matters so much.
2. Add bridges where you need islands. If a piece must stay inside a hole, leave a small bridge of material linking it to the surrounding shape, as stencil makers do.
3. Respect minimum feature size. Very thin bridges and narrow details can burn away, char or snap. Thicker, softer and more heat-sensitive materials need wider features than thin card. Keep delicate parts generous and test on scrap.
4. Account for kerf. Kerf is the width of material the beam removes. Outer shapes come out slightly smaller than drawn and holes slightly larger. It rarely matters for decorations, but for inlays, tabs and press-fit joints, measure your machine's kerf on a test cut and compensate in your editor.
5. Remove duplicate paths. Two identical paths stacked on each other make the laser cut twice, which scorches edges. The Adobe community thread on double cut lines covers how duplicates sneak in.
6. Run a small test. Scale the design down and cut it on scrap before committing an expensive sheet.

Combining operations in one project

Many projects use all three. A wooden ornament might have a cut outline, a scored line drawing inside and an engraved name. The cleanest workflow is to generate each part in the structure it needs rather than forcing one file to do everything:

• Generate the outer ornament as Cut-ready shapes.
• Generate the inner illustration as Pure lines (for machines).
• Bring both SVGs into your laser software, align them, and assign cut to the first and score to the second.

Because the line file uses real strokes, you can also adjust stroke width and color in LineSVG before export. The laser still follows the path once, but a bolder preview makes alignment on screen much easier. Download SVG for the laser, or download PNG if your software engraves images directly.

Choose the structure first

When a laser job goes wrong, check the file before the power settings. Cut and fill engrave want closed shapes; score and line engrave want single paths. Pick the matching output type before you generate, and most of the cleanup disappears.

Start with the laser cut SVG tool for cut-ready ornaments and signs, or logo to vector to turn a mark into clean filled shapes. If you are still unsure what separates strokes from outlines, read Stroke, outline or fill: the three kinds of line in an SVG.