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Version 1.3 Released July 2026

Fine-tune the nest, keep the real curves

Adjust a finished nest by hand with exact moves, measuring and snapping, pack curved parts into each other, lose half-empty last sheets, and get DXF files that keep your real arcs and layers.

01 · Edit by hand

The nest is yours to adjust

Move the one part you know better about, without nesting the job again.

On a finished result, press Edit layout. Drag a part, turn it 90° either way, duplicate or delete it, or type an exact Move by distance or Rotate by angle.

While you drag, the gap to the nearest part and to the sheet border is shown in mm. Snapping catches a part touching its neighbour or exactly at your spacing, and flush with the border or at the border distance. Hold Alt to place it freely.

Measure reads a distance or the true gap between two parts, holes included. Align and distribute line up a row. Parts left closer than your spacing are flagged before you cut, and the export always follows your edits.

Edit by hand
Moving and aligning parts on a finished nest On a finished sheet, a part is dragged toward its neighbour while a live dimension shows the gap shrinking to 12 mm. On release it snaps to the spacing, 5 mm. Then two parts are selected, the Align top command lights, and the lower part moves up to line up with the other along a dashed guide. 12 mm 5 mm snap: spacing Align top
Drag a part toward its neighbour: the gap reads live and snaps to your spacing. Then line a row up.

02 · Curved parts

Crescents and rings sit inside each other

Hollow-curved parts stop wasting the space inside their own curve.

A crescent, an arc segment or a ring has a hollow that no rectangle can use. Lapas Core now tries positions inside the curve of an earlier copy of the same part, so the copies nest like spoons instead of lying side by side.

It only acts on strongly curved parts, so ordinary parts nest exactly as before.

Measured on one customer job of tank rings, over ten runs: 29.4 sheets on average before, 28.5 after, and never worse.

Curved parts
Copies of a curved part nest inside each other's curve Three copies of the same crescent-shaped part stand in a row with wasted space between them. The second and third slide left until each sits inside the curve of the one before, like nested spoons, and the used length of the row gets shorter. used length
Copies of one crescent slide into each other's curve, and the used length shrinks.

03 · Last sheet

Fewer half-empty last sheets

A last sheet with three parts on it is often a sheet you did not need.

After packing, Lapas Core looks at a nearly empty last sheet and moves its parts into the space left on the earlier sheets. When they all fit, that sheet is dropped. It also works on jobs where you set stock quantities.

When they do not all fit, the parts left over are pressed into the corner instead of floating mid-sheet, so the rest of that plate stays in one piece.

Measured on two customer jobs: 94 sheets became 93, and 13 became 12. It saves a sheet only when the parts really fit elsewhere.

Last sheet
The parts on a nearly empty last sheet move into gaps on earlier sheets Three sheets side by side. The first two are mostly full with a few gaps; the third holds three small parts. The three parts move into the gaps on the first two sheets, the third sheet is left empty and fades to a dashed outline, and the count changes from 3 sheets to 2 sheets. 3 sheets 2 sheets
The last sheet's parts move into gaps on the earlier sheets, and that sheet is no longer needed.

04 · DXF export

Real arcs and your layers, back out

Your CAM gets curves it can lead into and smooth tool paths, not hundreds of short lines.

The DXF export writes arcs and circles as true ARC and CIRCLE entities wherever the geometry can be matched exactly, filleted corners included. Anything it cannot match exactly stays as line segments, never an approximate curve.

Under Cut layers choose one cut layer, outer and inner contours split onto their own layers so your CAM can set lead-in side and cut order by contour, or Preserve source layers with the names from your own file. The choice is remembered.

True arcs
A rounded corner exported as one arc instead of short lines A plate with rounded corners and two holes. A magnifier on one corner shows it first as six short straight lines, then as one smooth arc. Then the outline and the holes take two layer colours, labelled OuterProfile and InnerFeatures. short lines one ARC OuterProfile InnerFeatures
A fillet goes out as one arc instead of short lines, and outlines and holes can go to their own layers.

Also in 1.3

Smaller changes

  • A failed import comes with a fix

    Instead of a dead-end error: close the gaps and retry in one click, or re-read the file in millimetres, centimetres or inches.

  • Why a nest failed

    A failed nest says why: a bad part outline, a part bigger than the sheet, or a drawing far from the origin.

  • Drawings far from the origin

    Survey and site-plan DXFs drawn millions of units from the origin now nest.

  • Mirrored arcs

    Mirrored arcs and ellipses no longer throw holes outside the part.

  • Honest "% packed"

    Packing counts each part's outer footprint, so flanges with big holes no longer look half-empty. Net material yield is still shown.

  • Faster downloads

    Exports stream as a normal browser download with progress and no longer freeze the page.

  • Try it on a sample

    "Nest a sample part" on the empty upload page gives an instant demo nest.

  • Machine posts for G-code

    G-code export picks a machine post, with lead-ins. Check a new program on your machine before cutting.

  • Layers panel

    Recolour or hide cut and engrave lines in the viewer and see the source layers.

All releases

  1. 2.0 19–24 Sep 2026 Common-line cutting and kerf, done properly Set your machine up once, cut the shared line once, set the kerf once, hear about slots too narrow for the beam before you nest, and have every G-code and PLT program checked against your parts and your machine before you download it.
  2. 1.5 1–18 Sep 2026 More file formats, and offcuts in their real shape Open DWG, PDF, Illustrator and LightBurn files, keep the real shape of every offcut and nest onto it, fix a part that does not fit in one click, and cut a part in a bore before the bore.
  3. 1.4 August 2026 Fewer sheets, diagonal parts and kits Repeated parts pack onto fewer sheets, long parts that only fit at an angle now nest, kits stay whole on one sheet, and a short result tells you what is missing with a one-click fix.
  4. 1.3 July 2026 Fine-tune the nest, keep the real curves Adjust a finished nest by hand with exact moves, measuring and snapping, pack curved parts into each other, lose half-empty last sheets, and get DXF files that keep your real arcs and layers.
  5. 1.2 June 2026 Your stock, your angles, your layers Nest one job across several sheet sizes, allow your own rotation angles, and sort cut and engrave layers with rules saved on your account.
  6. 1.1 May 2026 Clearer results, safer imports A warning before the run when a part will not fit the sheet, inch files at the right size, every layout checked before you get it, and a Fast to Quality speed slider.
  7. 1.0 Feb–Apr 2026 Lapas launches: true-shape nesting in the browser Upload DXF or SVG parts, watch them nest live by their real outline with small parts inside holes, and take the layout out as DXF, SVG, PLT, G-code or a PDF report.

Don't take our word for it.

Upload one of your own DXF files and see the layout yourself. It's free and takes about two minutes.

On a phone? Book a 20-minute call and we nest your file with you on a screen share.

Nest your own file for freeBook a call
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No credit card · No install · Your files stay yours

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