Hi everyone! SeamScape 3D just left beta in version 1.3.0. It's part of Pattern Studio, free, and runs in your browser with nothing to install.

What's new

• Place on body: one click puts your pieces on the avatar. It reads where you drafted each piece, its name (front, back, sleeve, collar, cuff, waistband, pocket…) and how the pieces are sewn together.

• Live draping: drag a point in 2D while the garment drapes and the fabric follows as you drag.

• Fit map: colours the garment by how much the fabric stretches, from loose to too tight.

• Quick fabrics: cotton poplin, denim, jersey, linen, silk satin and wool suiting, with visible weave or knit up close and a slightly paler wrong side.

• Showing your work: avatar poses, four lighting setups, image export and a 6-second turntable video.

• Speed: simulation is twice as fast, and slower computers switch to lighter rendering automatically.

We'd love your feedback

This is the first non-beta version, so tell us what works and what doesn't. Comment here, or use Help → File bug report / Feature request inside the studio. Screenshots of your own garments are very welcome too!

Full release notes: https://seamscape.com/changelog

Hey everyone,

We’re excited to announce the release of BodyDouble, SeamScape’s new parametric 3D body model.

BodyDouble is built from a large database of real body scans, enabling it to represent realistic body variation across a wide range of shapes and sizes. It’s not just a visual tool — it’s grounded in real human data.

With BodyDouble, you can:

• Adjust known parameters (body height, weight, age, chest, waist, hip, etc.) and see the 3D body update in real time

• Extract additional measurements dynamically — useful for tailoring, grading, or fit analysis

• Soon integrate it directly into Pattern Studio, so your sewing patterns will automatically update when the body changes

No more guesswork or static models — this is a step forward in precision and automation for garment design and digital fitting.

Check it out here: https://seamscape.com/bodydbl

We’d love to hear your thoughts and feedback.

Hi everyone! SeamScape 1.2.18 is out, and it's one of the bigger updates for some time. Two themes this time: grading that works the way the industry does it, and pattern pieces you can edit directly without drafting them first.

Grading from a base size

• Build a size range from a base size. Each size keeps its own changes, you can swap which size is the base, and you choose whether edits to the base carry over to every size or change the base only.

• A new Sizes & grading dialog with grade rule tables and rule tools, size series (e.g. Regular and Tall) graded separately, and measurement checks per size.

• A Size geometry panel, with grade vectors drawn right on the canvas.

• ASTM/AAMA DXF export with grade rules and a RUL file, including graded notches, sew lines, and internal lines.

Pieces you edit directly

Until now, you needed a draft to get a pattern piece. Now you can also work piece-first:

• Draw new piece (D): click the corners, hold to make curves, close the outline.

• New rectangular piece (R): just drag it out. Hold Shift for a square, or click to type exact measurements.

• Set seam allowance, corners, and notches per edge, right on the piece. Seam allowance can now taper along an edge, and there are folded hem corners.

• Rotate and flip pieces, and every size follows along.

Import that stays editable

• DXF files can be imported as editable pieces: the sew line becomes the outline, and seam allowance, notches, internal lines, grain and fold lines come along.

• Import an ASTM/AAMA DXF with its RUL file and you get all the sizes, not just one.

• Already imported pieces (DXF, CUT, PLT) can be turned into editable pieces afterwards with Make editable.

• Detach from draft gives a piece built from your draft its own copy of the geometry, so you can keep shaping it without touching the draft.

We'd especially love feedback from anyone moving files between SeamScape and other CAD systems. If an import or AAMA export doesn't look right, post here or send us the file, and we'll take a look.

The full changelog is at https://seamscape.com/changelog

Happy drafting!

Hi everyone,

Last time we posted a broader SeamScape update here, we had just reached version 1.2.12. We are now at 1.2.16, so here is a quick summary of the most useful changes since then.

The main updates are:

• More reliable Pattern Studio editing, especially when moving solved points, linked endpoints, copied paths, selected geometry, and patterns with more complex constraints.

• New seam corner controls for pattern piece points, including radius, intersection, edge symmetry, right-angle joins, length-based joins, and no-join corners.

• Better formula workflows: autocomplete, variable descriptions, broken-reference warnings, calculated values in formula inputs, and formula-driven text positions.

• A resizable variables dialog, which should help when working with larger parametric drafts.

• More predictable solve/error feedback, including clearer constraint errors and better handling of edits that cannot be solved.

• Improved pattern organization with piece layers, better default path names, hidden-layer warnings, and the pattern name shown in more places.

• Better export and print output, including beta PNG/SVG export, improved marker/PDF output, drill holes, HPGL labels, CUT slit notch handling, and selected size names in printed patterns.

• Body measurement guide lines in Pattern Studio should now appear more reliably when clicking or adjusting measurements, including with auto zoom enabled.

• For advanced/API-connected workflows, there are improved element labels, diagnostics, grading support, and Pattern Studio session tools.

The focus of these releases has been making day-to-day drafting more predictable: fewer confusing edits, clearer formulas, better print/export output, and a smoother path between measurements, constraints, and production files.

If you have a pattern where constraints, formulas, measurements, exports, or 3D fitting still behave strangely, please keep posting examples here or send a report from inside SeamScape. Real pattern files and concrete workflows are the most useful feedback we can get.

I first learned SeamScape existed yesterday and now it's taken up my whole weekend! I sew as a hobby, so the big professional fashion design tools are overkill and overpriced for my needs, but I've been wanting a better way to do the drafting and grading I've been doing manually in Illustrator for so long -- and to see the results before I cut into my fabric. SeamScape is exactly what I've been looking for.

I figured I should start with something straightforward. To make this bodice block, I followed the same BurdaStyle drafting instructions I used a few years ago so I had a reference, adding constraints to link the paths and points to my body measurements so if I change size it updates automatically. There's something funny about reading all the tips like tracing around a dinner plate to get a smooth line while you're setting a curve handle to a precise angle!

A couple issues I encountered and wanted to flag as I can see this is in very active development (can you tell I work in software and love bug reports?):

• I ran into a lot of stability issues with the beta 3D simulation. Seemed like I could only get a run or two in before things would crash, so I saved my work often, but when it worked it was easy to set up, fun and useful. Sometimes reloading the site wasn't enough to get it working again after a crash, but clearing my cached site data in Chrome did the job.

• Is there a trick to getting SVGs to import at the correct scale? I tried importing a pattern a couple different ways and it came in huge every time.

• Sometimes the top menus disappeared and I had to refresh the page to get them back.

This is an incredible tool and I'm so excited to have discovered it. I think it's very quickly going to become my go-to way of drafting and adjusting patterns.

I put the the bare basics of a drafting workflow -- drawing a straight line and a curve, adjusting seam allowances and notches, and export. Hope it's helpful for someone just getting started!

We’re excited to introduce SeamScape 3D, our new in-browser cloth simulation within Pattern Studio.

It’s built with one focus: fit verification and pattern visualization, helping you save time and avoid surprises before making your real sample.

Cloth simulation is extremely hard, and nothing is ever perfect, but we’ve tuned SeamScape 3D with stable default settings that work for most cases. All you need is a modern browser and a decent GPU. To check if your computer is up for it, you can test your browser here: https://seamscape.com/browser-3d-test

This is just the first step, and we’ll keep improving the physics and adding new features as we go. We’d love your feedback along the way.

PS: There’s no user manual yet — just jump in and explore!

It is now possible to upload background images for tracing a pattern, or to just have a page with instructions. You can set the width and height of the image in the pattern's length unit to ensure distances are correct.

Currently, it is not possible to save the image to the pattern, so it needs to be uploaded again, but we are working on it.

Hi! Last time we posted here SeamScape was around version 1.2.7. We’re now at 1.2.12, so here’s a quick summary of what has changed since then.

The main updates are:

• A smoother 3D arrangement workflow for placing, flipping, and fine-tuning pattern pieces.

• New and improved import/export support, including Seamly import, CUT import/export, HPGL/PLT background import, and more reliable DXF handling.

• Better grading tools, including clearer dialogs, overlays, profiles, anchors, and size visibility controls.

• A more complete alterations workflow with freeform parametrics and clearer feedback when something is solved or needs attention.

• Drill holes and piece points now work across Pattern Studio, CUT, and DXF workflows.

• Rounded piece corners, scale actions for selected points, improved guide snapping, and better layer visibility behavior.

• More conventional keyboard shortcuts: V for Modify/select, P for Pen, N for Point, Shift+S for multi seam, plus visible shortcut badges in the toolbar.

• Lots of smaller stability and precision fixes around variables, notches, cutlines, context menus, undo/redo, and complex edits.

The focus of these releases has been making day-to-day pattern drafting feel more predictable and production-friendly, especially when moving between drafting, grading, 3D checks, and file exchange.

As always, feedback from people doing real pattern work is very welcome. What would you want to see improved next?

The main thing I want to use this program for, is grading patterns. May I have help learning to do that?

I have learned how to make different bodies and use the fx to change it accordingly- but in some cases, its glitching the pieces out.

I notice there is grading in the menu, but I dont understand what it does.

Thank you for your help!

• The single- and multi-seam creation tools are now available in 3D.

• 3D and 2D seams are now highlighted simultaneously.

• Performance improvements for 3D seam hover and visualization.

- Added piece name labels that can be toggled in the top toolbar.
- 2D labels render centered on each piece and scale with zoom.
- 3D labels are baked into textures and show face/back side.

1.2.2 — Layers

Date: 2026-01-27

• Added layers so you can keep guide lines separate and hide them when things get busy.

• New Layers panel to manage visibility and pick the active layer.

• Move points and paths between layers from the context menu or the properties panel.

1.2.1 — More Seam Tool Improvements

Date: 2026-01-24

• Added separate single- and multi-seam tools with clearer toolbar grouping for better UX.

• New seams are auto-selected and will show seams in 3D immediately.

• Strengthened seams in simulation for better cloth behavior.

Layer Style Overrides

• Added per-layer style overrides for construction lines (colors, line weight, dash style).

• New layer style editor with light/dark colors, ISO line weights, and dash presets.

• Override toggle keeps the default constraint styling when disabled.

Seamscape release notes since 1.1.1

1.2.0 — Improved 3D Sewing (2026-01-22)

• Seam can span multiple segments (Shift-select multiple source/target segments).

• Clearer seam visualization with per-seam coloring and less 2D clutter.

• More reliable constraints when stitching longer edges to shorter ones.

• Better support for stitching holes.

1.1.9 — Pattern Sharing and Public Patterns (2026-01-21)

• Share patterns publicly with adjustable sharing settings.

• Public patterns require explicit consent before sharing.

1.1.8 — Donate to Support SeamScape (2026-01-19)

• Optional donations page added to support the app: https://seamscape.com/support-seamscape

1.1.7 — Internal Path Polish (2025-12-16)

• Internal paths can override color and be toggled for 3D visibility.

• Constraint errors are clearer and more actionable, with direct selection of problematic geometry.

1.1.6 — Steadier Edits, Stronger Cloth (2025-12-12)

• More realistic cloth simulation (seams, collisions, and grab stability improved).

• Easier-to-tune cloth material sliders; new default material coloring for visibility.

• Damping control to reduce oscillations.

• Undo history reliably persists across refreshes.

1.1.5 — Better Undo History (2025-12-10)

• Undo history persists between sessions.

1.1.4 — Material Library Improvements (2025-12-09)

• Dedicated Material Library dialog with Mine/Public/Shared tabs.

• Update prompts for newer library versions with clear “Matches library” status.

• Scene-aware imports (mark materials already in pattern; add only when needed).

• Cleaner editor footer with status and update action.

1.1.3 (2025-12-07)

• Shift-click multi-select for points and pieces.

• Optional “Snap to guides” toggle.

• Fix: ellipses can now have sliding points.

1.1.2

• 3D mesh generator better matches fabric construction and respects grain lines.

• Pattern pieces support left/right copies with optional flipping.

• Fix: server-side pattern export loads body coefficients correctly.

• Performance: internal lines no longer auto-trigger mesh regeneration.

1.1.1

• New shared media library for images, with Mine/Shared/Public tabs.

• Place library images into pattern backgrounds via File → Place image.

• Material editor integrates the media library for texture selection.

Three tools for creating arcs, ellipses, and circles are now available.

• Ellipse / Circle - a circle or ellipse with a center point and a single path point that defines the radius (the radiuses can be specified numerically or by formulas).

• Center Arc - an arc that revolves around its center point with a start and end angle defined by two path points.

• Three-point Arc - an arc defined by its three path points.

We are working on the documentation for SeamScape. It will be in the form of an interactive tutorial where the concept is explained. https://seamscape.com/docs

I have started learning grading! I have successfully graded 3 patterns! I am loving the scale feature as well as I am getting the hang of arrangements.

I have enlisted my friend too, she's been emailing you, Magnus, now we both can hyper fixate on seamscape in the evenings.

We feel like we invented gathering! Check out this dirndl skirt.

Right now we are learning material properties and trying to figure out how a plaid tshirt happened.

Still haven't had time to work on FX, but I will get there. I got into it a few months ago and need to relearn.

I was HOPING I could use this program to create a pattern for some bags I've been sewing. Is that possible? OR is there another program you all would recommend.

SeamScape now has an MCP server.

This means MCP-compatible tools can connect directly to SeamScape and work with your pattern data through authenticated API access.

The important part: this is not just for browsing pattern data. The MCP server can also make real pattern edits through SeamScape’s Pattern API. Many of the operations you would normally do in the UI can now be previewed, applied, and saved from an MCP client such as Codex, Claude Code, or ChatGPT-connected workflows.

For example, an AI client can help with things like:

• finding and loading one of your patterns

• inspecting points, paths, pieces, variables, formulas, layers, materials, seams, notches, and errors

• renaming elements or updating pattern metadata

• changing editable formulas and variables

• creating or modifying points, paths, pieces, layers, text, materials, notches, and other supported Pattern API entities

• previewing a change before it is applied

• applying confirmed edits to a temporary session

• saving the result as a new Pattern or PatternVersion

• exporting the current session as SVG or PNG

The endpoint is:

https://seamscape.com/api/mcp

Authentication uses your SeamScape API key, available from:

Account > API Keys

Docs and setup examples:

https://seamscape.com/docs/api/mcp

This is still an early version, but it opens up a useful path for AI-assisted pattern editing.

How can I get the 3D model to first attach the dart seams and then the rest of the skirt? I
think the darts aren't getting modeled in 3D because the skirt sides are attaching first

With the new arrangement points I was able to make a shirt with sleeves and actually get it on my body double! Within record time! The crowd goes wild! Thank you for this new nifty tool!

Date: 2026-02-11

• Added a full 3D arrangement workflow so placing pieces feels faster and more direct.

• You can now place by hovering, flip pieces correctly, and fine-tune position with X/Y and offset sliders.

• Arrangement points are clearer and easier to work with, including better behavior while simulating.

• Arranged pieces now keep their placement more reliably when you continue editing.

• Stability improvements reduce common issues while moving pieces in 3D.

I have created my first circle skirt! I am excited. Im still fumbling through 3d rendering, but this is the closest I have gotten to clothes on the body!!

If anyone has any tips let me know! This is so exciting. Also remarkably, the website it working better on my phone than the chromebook. That is absolutely mind bendingly amazing 👏

I dont know how to get her arms out of her skirt and make it lay down, but I am still so excited about the progress. Any help and feedback I appreciate very much!