Key takeaways
- Measurement-led pattern work: CLO brings 2D pattern drafting and 3D garment development together, with tools for working from measurements and points of measure (POM).
- Grading controls: CLO lets pattern makers edit grading values across sizes, including by applying a value to multiple selected fields.
- Fit review: Stress, Strain, Fit, and Pressure Maps give teams different visual ways to assess a simulated garment’s fit and behavior.
- Connected 2D and 3D work: CLO’s 3D Linked Editing helps designers review pattern changes alongside the garment simulation in one workspace.
- Production handoff: CLO supports Standard DXF, DXF-AAMA, and DXF-ASTM exchange, as well as AI and PDF pattern files. Teams should check exported files against their receiving workflow.
2D CAD drafting precision and measurement automation
Digital pattern work needs more than a convincing on-screen garment. Patterns must be shaped, measured, and prepared for the production steps that follow. For technical designers, the useful question is how well a workflow connects 2D pattern decisions with a 3D view of the garment.
The digital pattern engineering workflow connects 2D geometric precision with 3D physical drape:
- Measurement input or flat sketch: Designers input numerical body measurements or import technical sketches to establish base dimensions.
- 2D CAD pattern drafting engine: The software executes parametric drafting, generates points of measure (POM), modifies blocks, defines style lines, and assigns seam allowances, notches, and darts.
- 3D garment assembly and drape: Pattern pieces link across seam lines and receive digital fabric physics parameters for real-time simulation.
CLO focuses heavily on measurement-driven drafting automation. According to CLO Explore, the software can create points of measure and apply grading automatically from measurements entered during pattern drafting. Its Pattern Drafter allows pattern makers to generate parametric patterns from baseline measurements, connecting numerical specification sheets directly to the visual drafting window.
CLO’s Pattern Drafter supports building parametric patterns from baseline measurements, while its 2D workspace lets pattern makers continue refining the pieces. That combination makes it possible to move from measurement inputs to a visual pattern and then review how the pieces behave when assembled in 3D. As with any digital pattern workflow, the result still depends on the designer’s patternmaking decisions and the accuracy of the inputs.
Multi-size grading automation and rule consistency
A well-considered size range starts with consistent grading. Grade rules control how a base pattern changes across sizes at key points, helping teams preserve the garment’s intended proportions as they develop a full range.
Digital size scaling coordinates base geometry across the full production run:
- Base size pattern definition: The core sample size (such as Size M) establishes initial proportions and master grade points.
- Grading rule application: Pattern makers apply multi-field rule sets or formula-based deviations to control directional growth.
- Automated size run generation: The system scales the full range (XS through XL), preserving proportional seam balance, verifying notch positions and POM tables, and formatting data for DXF or Rule File export.
CLO provides documented multi-field grading controls and formula-based deviations. Per the CLO Set Grading Guide, users can apply a single entered value across all selected grading fields simultaneously. Furthermore, according to CLO Explore, CLO applies entered measurements and grading rules across sizes while keeping the generated results fully editable by hand. Grading data can be embedded directly into standard DXF files or exported as standalone Rule Files, as outlined in the CLO DXF Guide.
CLO’s grading controls allow pattern makers to edit values by size and apply a shared value across selected fields. That can make routine size-run adjustments more direct, while keeping the graded pattern available for further review and refinement. The grade rules still need to reflect the garment’s design and fit intent; automation does not replace that judgment.
Fabric physics and 3D fit diagnostics
A realistic drape is useful, but technical teams also need ways to inspect fit and fabric behavior more closely. CLO’s fit maps add visual diagnostics to the 3D review, helping designers spot areas that may warrant another look before making a physical sample.
Digital fabric physics and diagnostic evaluation follow a structured simulation flow:
- Digital fabric parameter definition: Measured physical textile properties—including weight, thickness, bending rigidity, shear, and stretch resistance—are assigned to the pattern pieces.
- 3D simulation processing: The physics engine simulates gravity, cloth-to-body contact, and multi-layer fabric behavior against the digital avatar.
- Fit evaluation and diagnostic output: Technical teams inspect visual silhouette and fabric drape (such as heavy wool structure) alongside diagnostic heat maps (Stress, Strain, Fit, and Pressure Maps) to identify structural tension and ease discrepancies.
CLO provides four fit maps, each offering a different view of the simulated garment, as described in the CLO Garment Fit Maps guide:
- Stress Map: Shows force along the fabric grain per unit area, with color and numerical values.
- Strain Map: Shows the garment’s stretch rate under external force.
- Fit Map: Highlights garment tightness, including areas identified as tight or not wearable.
- Pressure Map: Shows pressure the garment exerts on the avatar.
Used together, these views give fit teams several ways to investigate what they see in the drape. They are diagnostic aids, not a substitute for reviewing the garment construction, fabric inputs, avatar, and intended fit.
Bidirectional 2D/3D synchronization
During a technical review, designers often need to adjust a pattern and see how the change affects the garment. CLO’s connected 2D and 3D workspace is designed to support that pattern-to-simulation review without turning each adjustment into a separate handoff.
- 2D pattern interface: Adjustments made to seam lines, darts, waistlines, or style lines immediately recalculate 3D draping.
- 3D simulation window: Modifications made directly on the 3D garment model provide real-time drape and tension feedback while pushing corresponding geometric updates back to the 2D flat pieces.
CLO brings 2D pattern work and 3D garment review into one workspace. Its 3D Linked Editing supports pattern adjustments alongside the simulated garment, so designers can assess the visual effect of changes as they develop a style. The exact editing steps depend on the tool and workflow being used, but keeping the pattern and 3D view connected can make design reviews easier to follow.
CAD interoperability and tech pack export
A pattern file often passes through several teams before it reaches production. Clear import and export options make that handoff easier to manage, though teams should always confirm that the receiving workflow reads the pattern and grading data as expected.
Modern CAD platforms output specialized data across three core downstream channels:
- Standard production CAD exchange: DXF-AAMA, DXF-ASTM, and Standard DXF files export cut-ready pattern geometry directly to factory cutting rooms and automated plotters.
- Vector design formats: Adobe Illustrator (AI) and vector PDF files deliver editable vector linework for design review, presentation, and technical illustration.
- Tech packs and specification packages: Automated bill of materials (BOM) summaries, point-of-measure (POM) tables, and artwork placements package technical design data for supplier handoff.
CLO supports Standard DXF, DXF-AAMA, and DXF-ASTM pattern exchange, with export options for graded patterns or separate rule files. Its documentation also covers pattern import and export in AI and PDF formats. These options can help teams pass pattern information into downstream workflows; it is still good practice to check a sample export against the receiving team’s requirements. CLO also supports creating technical materials for handoff, including tech packs and vector files.
Comparison matrix and platform selection guide
The table below brings the main CLO workflow points together. Feature availability and exact steps can vary by setup, so consult the current documentation when planning a production handoff.
| CLO workflow area | What it supports |
|---|---|
| 2D pattern work | Measurement-based pattern drafting and POM tools |
| Size grading | Editing grade values across sizes, including multiple selected fields |
| Fit review | Stress, Strain, Fit, and Pressure Maps |
| 2D/3D workflow | 3D Linked Editing within a connected workspace |
| File exchange | Standard DXF, DXF-AAMA, DXF-ASTM, AI, and PDF options |
Workflow selection recommendations
- Consider CLO if your team wants to develop 2D patterns alongside 3D garment simulation, review fit with visual maps, grade patterns across sizes, and exchange common apparel CAD formats.
- Assess the workflow before committing: Try representative styles, size ranges, materials, and file handoffs to see how CLO fits your team’s day-to-day pattern and sample-review process.
Frequently asked questions
Can software draft sewing patterns directly from body measurements?
Yes. CLO includes a Pattern Drafter for creating parametric pattern pieces from entered body measurements. Teams can use measurement and POM tools to establish a starting point, then review and refine the pattern for the intended style and fit.
How can a team review a coat’s drape before cutting fabric?
CLO lets designers assign fabric properties and simulate a garment on a digital avatar, offering an early visual review of drape and silhouette. It can help teams assess a heavy coat before cutting a physical sample, but the result is a simulation—not a guarantee that the digital garment will behave exactly like the finished garment in wear.
How do tension and strain maps identify garment construction defects?
CLO’s fit maps use color and values to show different aspects of a simulated garment, including stress, stretch rate, tightness, and pressure on the avatar. They can point designers toward areas to inspect—for example, a region that appears especially tight—but the team should interpret the maps alongside the pattern, fabric settings, avatar, and intended ease.
How do 3D virtual fit tools reduce physical sample iteration cycles?
A 3D review gives teams another opportunity to catch issues with drape, balance, or fit before making a sample. CLO can support that early review by bringing patterns and garment simulation together, but how much physical sampling a team can avoid depends on its product, materials, process, and validation requirements.