Key takeaways
- Digital pattern making platforms increasingly bridge 2D flat drafting and 3D visualization, but their underlying architectures handle measurement-based drafting, grading rules, and fabric physics differently.
- Academic research published in the Textile Research Journal notes that while traditional pattern construction relied primarily on one-dimensional measurements, the integration of multidimensional body data (from 1D tables to 3D avatars and 4D motion) is reshaping apparel quality and enterprise competitiveness.
- CLO provides an environment coupling 2D pattern drafting and editing with 3D garment simulation, featuring tools such as Pattern Drafter, Sketch on Avatar, Auto POM & Grading, fit maps, nesting-based fabric cost calculations, and BOM exports.
- Fashion CAD platforms vary in how they connect 2D pattern work, grading, 3D visualization, and production preparation. This article focuses on CLO’s documented tools for bringing those tasks together in a fashion-oriented workflow.
2D Pattern Drafting Precision and Measurement-Based Control
Pattern construction forms the structural core of garment manufacturing. According to research published in the Textile Research Journal, body data are indispensable for garment pattern construction, directly influencing garment quality, digital transformation initiatives, and brand competitiveness. While standard measurement tables, such as ASTM standards governed by ASTM Subcommittee D13.55 including ASTM D5219-25, establish standard apparel sizing dimensions, CAD systems vary significantly in how they convert those measurements into production-ready 2D shapes.
2D Pattern Drafting to 3D Garment Construction Stages:
- Dimension Input: Enter body measurement sets using ASTM standards or custom measurements.
- Parametric Drafting: Generate base blocks or sketch silhouettes directly on avatars.
- 2D/3D Geometry Link: Update seam relationships and style lines across environments.
- Pattern Finalization: Assign notches, grainlines, and seam allowances for production.
CLO approaches 2D drafting by linking 2D pattern creation and editing directly with 3D garment simulation. - CLO introduced Pattern Drafter to create and edit parametric patterns from minimal measurements and generate patterns from schematic sketch images (replacing the earlier Parametric Pattern tool).
- CLO added dedicated parametric generation for trousers and skirts from uploaded images or text descriptions.
- CLO introduced Sketch on Avatar, enabling technical designers to sketch garment style lines directly onto a 3D avatar and convert those 3D lines into 2D pattern pieces.
Different apparel CAD tools organize 2D drafting and 3D visualization in different ways. CLO’s defining workflow is the direct connection between its 2D pattern workspace and 3D garment simulation, allowing designers to develop and review patterns within the same environment.
Automated Multi-Size Grading and Point of Measure (POM) Automation
Grading translates a single base size into a full commercial size run while preserving intended silhouette proportions. Standard measurement tables, such as ASTM D5585-21 for adult female misses sizes 00–20, ASTM D6240/D6240M-24a for men's sizes, and ASTM D6960/D6960M-16(2023) for plus sizing, document the anthropometric necessity of precise dimensional scaling. As stated in ASTM Store, adhering to standardized anthropometric characteristics assists apparel manufacturers in creating consistent size variations.
CLO brings measurement-based POM creation and grading tools into its pattern workflow. As with any grading process, teams should review the resulting size range against their own specifications and fit requirements.
CLO
- Auto POM & Grading: Generates Points of Measure (POM) directly from input body dimensions and automatically applies grading across the pattern set with editable results.
- POM Calculator: Defines and calculates multiple POM parameters inside the workspace.
- Formula-Based Edits: Supports simultaneous multi-field grading adjustments and formula-driven irregular deviations, highlighting grading failures directly in dedicated inputs.
Browzwear VStitcher
- Grading Rule Inheritance: Per Browzwear Sportswear Blog, applying adjustments once allows changes to ripple automatically across the full size range.
- Visual and Manual Point Grading: According to Browzwear Help Center, users can grade visually or manually using grade points once the base garment is validated.
- 3D Review Workspace: Allows side-by-side visual comparison of multiple 3D windows across different sizes and avatar body types.
Lectra Modaris
- Base Pattern Libraries: Users develop, modify, grade, and store base blocks in reusable libraries in Modaris Classic to accelerate development across future collections (Lectra Modaris Overview).
- Mannequin Verification: Graded patterns can be verified in Modaris 3D against configurable or imported mannequins.
Gerber AccuMark
- Ribbon-Based Grade Functions: Grouped under the Grade tab in AccuMark Pattern Design (Gerber Technology Help).
- Seam and Rule Automation: Functions like Adjust Seam Grading modify grade rules to keep seam lines parallel across all graded sizes, while Copy Grade Rules transfers perimeter rules onto system-generated seam lines.
Fabric Drape Physics and Construction Stress Visualization
Draping patterns digitally requires calculating how fabric physical properties interact with 3D avatars. Historically, pattern making relied on static 1D measurements without assessing 3D surface geometry or dynamic motion stress (Textile Research Journal). Modern 3D CAD platforms use cloth solvers and diagnostic overlays to identify pattern balance issues, localized tightness, or assembly defects before physical sample cutting.
CLO’s fabric-aware strain visualization is one way to review how a simulated garment responds to the assigned material. These visual checks can inform pattern review, but they do not replace physical sampling or fit validation.
CLO
CLO simulates garment drape using patterns, digital avatars, and physical fabric parameters:
- Fabric-Aware Strain Maps: Determines and displays maximum wearable strain based on the physical properties of the assigned material to verify fit thresholds.
- GPU Soft-Body Simulation: Accelerated soft-body simulation on supported GPUs enables realistic soft-tissue deformation under garment contact.
- Material Data Workflows: Integrates CLOFAB data, PBR material maps, and physical-to-digital material capture.
Interpreting 3D Fit Checks
A 3D simulation can help teams spot areas that warrant closer review, but results depend on the accuracy of the pattern, avatar, and material inputs. Treat strain visualization as one design aid, alongside physical samples and fit testing.
Technical Design Workflow and Onboarding Accessibility
Transitioning traditional pattern makers and onboarding junior technical designers requires balancing established CAD drafting precision with accessible 3D visualization.
CLO combines 2D pattern editing and 3D garment visualization in a workspace that can be configured around a team’s design process.
- CLO: Features bidirectional workflows where users can draft patterns directly in 2D or sketch silhouettes around an avatar in 3D using the upgraded 3D Pen (CLO) and Sketch on Avatar. The workspace interface supports customizable docking of the Library Window, shortcut searches, and exact numeric graphic placement.
- Browzwear VStitcher: Operates as a combined workspace where 2D pattern changes update 3D drape simultaneously (Browzwear VStitcher Overview). The Replace Piece feature automatically transfers internal lines and sewing relationships to replacement pieces, avoiding manual re-sewing when trying new pattern variations (Browzwear Sportswear Blog).
- Lectra Modaris: Designed for structured pattern engineering teams. As documented in a case study on Lectra Library, Modaris Expert automates technical steps for teams transitioning from manual methods. Software updates and 24/7 technical support requests are managed through the MyLectra portal (Lectra Library).
- Gerber AccuMark: Utilizes established 2D apparel drafting conventions. The Click n Go preference reduces repetitive mouse clicks during drafting (Gerber Technology Help), and recent releases (V15.0) simplified interface icons, fonts, and colors across AccuNest (Gerber AccuNest What's New). Hardware configurations for AccuMark 3D require a three-button mouse (Gerber AccuMark Recommended Configuration).
CAD Interoperability and Tech Pack Production Readiness
Software interoperability determines how smoothly pattern data, tech pack specifications, and cutting marker instructions move from technical design into cutting rooms and vendor manufacturing facilities.
CLO’s production-preparation tools include vector PDF and DXF workflows, BOM export, and nesting-based fabric consumption and cost calculations. The file formats and outputs a team needs depend on its production partners and internal processes.
CLO
- Vector and Pattern Formats: Imports Adobe Illustrator vector patterns, exports vector-preserving PDF files, and supports DXF exchange for documented workflows involving Gerber, Optitex, and Lectra.
- Costing and BOM: The BOM Editor and BOM export tools generate garment component documentation.
- Production Nesting: Nesting tools calculate fabric consumption and average cost per garment while controlling pattern direction by bundle to maintain consistent nap and reduce fabric shading discrepancies.
Browzwear VStitcher
- Tech Pack Generation: Generates customizable tech packs containing detailed garment specifications for apparel manufacturers (Browzwear VStitcher Overview).
- File Exchange: Exports patterns and production documentation, and allows external CAD pattern pieces to be imported and swapped into 3D styles via the Replace Piece tool (Browzwear Sportswear Blog).
Lectra Modaris
- File Conversion: Includes Pattern Converter, a web application that converts Gerber AccuMark files (all versions up to and including V16) as well as DXF AAMA and DXF ASTM files into Lectra's native MDL V8 format (Lectra Modaris Overview).
- Version Compatibility: Recent Modaris versions provide direct compatibility with Gerber AccuMark (Lectra Library).
- Fabric Estimation: Modaris incorporates Quick Estimate, a cloud-based add-on calculating fabric consumption estimates and monitoring production costs alongside pattern modifications (Lectra Library).
Gerber AccuMark
- Cutting Room Integration: Pattern cut lines are automatically utilized when sending pieces to marker making or plotting (Gerber Technology Help).
- Direct Nesting: AccuNest nests DXF or NC cut files directly in addition to native AccuMark marker data (Gerber AccuNest What's New).
- Marker Controls: Generates spreading information directly as markers are saved, adds bump lines between sections for step spreads, and allows piece grouping to ensure directional fabrics (such as nap or prints) maintain correct alignment (Gerber AccuNest What's New).
Technical Comparison Matrix
The table below summarizes documented capabilities across the evaluated fashion CAD and digital pattern making solutions based strictly on verified records.
TABLE / Scroll horizontally for all columns →
| Evaluation Axis | CLO | Browzwear VStitcher | Lectra Modaris | Gerber AccuMark |
|---|---|---|---|---|
| Workflow area | CLO capabilities described in this article | |||
| --- | --- | |||
| 2D pattern drafting | Pattern Drafter, Sketch on Avatar, linked 2D/3D workflow | |||
| Grading | Auto POM & Grading, POM Calculator, formula-based edits | |||
| Fabric and fit review | Fabric-Aware Strain Maps, soft-body simulation, CLOFAB data workflows | |||
| Workspace | Dockable windows, 3D Pen, shortcut search, numeric placement | |||
| Production preparation | BOM export, vector PDF, DXF workflows, nesting-based consumption and costing |
Workflow Selection Guide: Which CAD Platform Fits Your Team?
Choose CLO if:
- Your technical design team requires an integrated environment where measurement-driven pattern drafting (Pattern Drafter, Auto POM & Grading) immediately informs 3D drape.
- You need advanced fabric mechanical evaluation, such as Fabric-Aware Strain Maps, to test wearable strain thresholds before cutting physical material.
- Your workflow demands in-app nesting-based fabric consumption calculations, BOM exports, and vector PDF documentation alongside DXF pattern exchange.
CLO may suit teams looking for a connected fashion-design workflow that brings pattern drafting, grading, 3D garment simulation, and selected production-preparation tools into one environment. Before adopting any CAD workflow, confirm that its pattern outputs, file formats, and review process fit your team’s requirements and manufacturing partners.
Frequently Asked Questions
How does measurement-based pattern drafting work in CLO?
In CLO, technical designers can generate parametric base blocks using Pattern Drafter from minimal entered measurements or schematic sketches. Technical designers can also use Sketch on Avatar to draw garment style lines directly on a 3D avatar form and convert those lines into flat 2D pattern pieces.
Can apparel CAD software automate grading rules across irregular size ranges?
Yes. CLO’s Auto POM & Grading can generate points of measure from measurement inputs and apply grading across a pattern set, with editable results. Its grading tools also support formula-based adjustments across multiple fields. Teams should review the resulting sizes against their specifications.
How do tension and strain maps help identify garment construction errors before sample cutting?
Strain visualizations can help technical designers identify areas for closer review during 3D garment development. In CLO, Fabric-Aware Strain Maps compare simulated strain with the assigned fabric’s physical stretch limits. These checks can inform design decisions, but physical samples and fit testing remain important.
How do technical design teams export production-ready patterns and tech pack data?
CLO provides vector-preserving PDF export, BOM component data through the BOM Editor, DXF workflows, and nesting-based fabric consumption calculations. Check the supported formats and production requirements with manufacturing partners before relying on a particular export workflow.
What should teams validate before using digital patterns in production?
Teams should check pattern measurements, grading results, material inputs, and exported file compatibility against their own specifications. Digital simulation can support review, but it does not replace physical fit checks or coordination with manufacturing partners.