Key Takeaways
- Measurement-led pattern development brings body data, 2D patternmaking, and 3D garment simulation into one workflow, making it easier to review a design before cutting a physical sample.
- CLO is built around the connection between 2D patterns and 3D garments, with tools for avatar-based fit review, fabric simulation, measurement, and visual development.
- CLO’s fit maps and measurement tools help designers spot tight areas, check ease, and investigate construction questions; they support professional judgment rather than replace it.
- Points of Measure (POMs), grading rules, and fit checks across multiple avatars help teams review how a design behaves across a size range.
- CLO-SET can support shared review of digital product information and design revisions, while physical sampling remains important for assessing hand-feel, construction, and production conditions.
From Flat Patterning to Measurement-Based Digital Design
Traditional flat pattern work depends on paper drafts or manual CAD editing. When specifications change or a fitting reveals a balance issue, a technical designer may need to revisit darts, armholes, and seam allowances by hand. Connecting pattern development with measurements and 3D review can make those adjustments easier to track across design and production teams.
In a measurement-based workflow, patternmakers use body dimensions such as chest circumference, waist placement, cross-back width, and shoulder slope to build or adjust blocks. Parametric drafting tools can update related pattern geometry when measurements change, helping maintain consistent relationships between specified dimensions and pattern contours.
Research published via the National Center for Biotechnology Information examines how combining 3D body dimensions with quantitative pattern parameters can help assess ease allowances and garment fit across apparel types, including shirts, blazers, and trousers. Reviewing virtual prototypes gives designers and other stakeholders another way to discuss drape and ease before committing to physical samples.
Setting Up Custom Avatars and Generating Pattern Blocks
A useful virtual fit review starts with an avatar whose measurements and proportions reflect the intended wearer. Designers can work from a standard size chart or scan-derived measurements to create a digital body for evaluating a garment.
Avatar Setup Checklist:
- Height and Vertical Proportions: Waist Height, Inseam, and High Point Shoulder.
- Circumference Anchors: Bust/Chest, Underbust, Natural Waist, and Low Hip.
- Limb and Joint Metrics: Bicep Circumference, Armhole Drop, and Total Sleeve Length.
- Posture and Balance: Shoulder Slope, Back Curvature, and Hip Volume.
CLO’s Avatar Editor lets technical designers adjust body shape and proportions, including bust cup size, upper-body volume, and hip profile, to align an avatar with a specification sheet. CLO also includes patternmaking tools such as Pattern Drafter, which can create garment blocks from entered measurements. The resulting pattern can be reviewed and refined in the same environment as the 3D garment.
Ease should be considered from the start. Stretch activewear may call for negative ease, while a tailored woven shirt or outerwear design will have different fit intentions. Setting these targets helps the designer assess how the drafted pattern relates to the avatar before sewing and simulation.
3D Garment Assembly and Drape Simulation
After drafting, pattern panels are arranged around the avatar and sewn together in CLO’s 3D workspace. A typical workflow includes:
- Panel Placement: Position pieces such as bodice panels, sleeves, collars, and waistbands around the avatar to prepare them for assembly.
- Sewing Configuration: Connect corresponding pattern edges, including darts, side seams, shoulder seams, and sleeve openings.
- Fabric Setup: Assign digital fabric properties, such as stretch, bending, shear, and weight, based on available material data.
- Simulation: Run the garment simulation to review how the assembled pieces drape and interact with the avatar.
CLO’s integrated 2D and 3D workflow helps designers see how pattern changes affect the garment on the avatar. The usefulness of the result depends on sound pattern construction, appropriate fabric settings, and a fit review informed by the designer’s experience. CLO is optimized for fashion design and apparel development; its sibling software, Marvelous Designer, is geared toward animation and gaming workflows.
Virtual Fit Review: Sleeves, Armholes, and Fit Maps
A convincing render is only one part of fit review. Designers also check garment balance, ease, and movement around areas that can be difficult to assess in a flat pattern alone.
Armhole Depth and Sleeve Cap Balance
The connection between the armhole (armscye) and sleeve cap can be a challenging area to fit. In CLO, designers can review the simulated garment for signs that the armscye sits too close to the avatar, that the sleeve cap needs adjustment, or that the sleeve is hanging out of balance. Useful checks include:
- Armhole Clearance: Does the armscye sit comfortably around the avatar’s underarm, without obvious binding or excess droop?
- Cap Ease Distribution: Do the sleeve cap and armhole lengths work together, with ease distributed appropriately across the front and back?
- Sleeve Hanging Angle: Does the sleeve fall naturally from the shoulder in the avatar’s resting posture, or are draglines suggesting a pattern or balance issue?
Linear and Circumference Measurement Tools
CLO’s 3D measurement tools let designers measure garment dimensions on the simulated avatar. A designer can check sleeve length from the shoulder toward the cuff, or compare bicep, elbow, and cuff measurements with the intended specification. These measurements help assess functional clearance, but they do not by themselves establish how a garment will feel or perform in every real-world condition.
Fit Maps and Other Visual Diagnostics
CLO provides visual tools that make fit review more specific. Fit maps use color to indicate tight and “can’t wear” areas on the simulated garment, helping designers locate regions that may need additional ease or a pattern adjustment. Stress maps offer a separate view of garment-to-avatar pressure. Each display is best treated as a guide to areas for further review, alongside measurements, fabric settings, and visual inspection.
When a fit map highlights a tight area near the shoulder blades, chest, or bicep, the designer can inspect the related pattern pieces and decide whether a seam adjustment, added ease, or a construction change is appropriate. The goal is not to let a color overlay make the decision, but to use it as a clear starting point for a considered fit adjustment.
Multi-Size Scaling: POMs and Grading Review
A pattern needs to work across the intended size range, not just on one avatar. Consistent measurement points and grading rules give technical designers a structured way to review how proportions change between sizes.
CLO supports this process with tools for measurement and grading:
- Points of Measure (POM): CLO’s POM tools help create and review garment measurement lines on 2D patterns and digital garments, supporting consistent specification checks.
- Grading: Designers can apply size tables and grading increments to pattern points, then review the resulting geometry against the intended measurements.
- Fit Across Avatars: Reviewing graded garments on size-specific avatars helps identify changes in ease, neckline position, and sleeve length across a range.
Apparel manufacturers such as Uniteks have documented presenting graded sizes in 3D for customer fit approval. More generally, digital size reviews give teams an opportunity to discuss styling balance before deciding which physical samples are needed.
Handoff to Production: Patterns, Tech Packs, and BOMs
Digital pattern development is most useful when its outputs can be reviewed and carried into the next stages of product development. A production handoff may bring together pattern geometry, a bill of materials (BOM), measurements, and assembly information.
Handoff Verification Sequence:
- Pattern Perimeter Check: Verify closed contours, notches, and grainline orientation.
- Seam Allowance Validation: Confirm seam turnings and corner notches against the production specification.
- Bill of Materials (BOM) Setup: Record fabrics, thread specifications, zippers, and trims.
- DXF Export: Export pattern files in an agreed DXF format where required by the receiving workflow.
- Tech Pack Review: Check the pattern, POM table, material information, and construction details together.
CLO supports pattern exchange through commonly used DXF formats, which can help teams move pattern geometry into a manufacturing workflow. CLO’s BOM and measurement capabilities can also help organize product information for review. CLO-SET complements this work by giving teams a shared place to review digital designs, keep feedback with the relevant product, and follow revisions. As with any digital handoff, teams should confirm file compatibility and production requirements with their partners.
Frequently Asked Questions
Can measurement-based pattern drafting software replace physical sample reviews entirely?
No. Digital patternmaking and 3D simulation can help resolve many questions about fit and proportion during early development, but they do not replace every physical review. Hand-feel, interlining, factory machine settings, and tactile finishes still need assessment through appropriate physical testing and production checks.
How do technical designers check sleeve length and bicep ease in 3D?
Designers can use CLO’s 3D measurement tools to measure the sleeve along the avatar’s arm and compare the garment’s bicep circumference with the avatar’s measurement and the intended ease. Results are most useful when checked against the design specification and the fit requirements for the garment.
How do fit maps help identify garment fit issues?
CLO’s fit maps use color to highlight areas marked as tight or “can’t wear” in the simulation. They help direct attention to places that may need a closer look, but they should be considered alongside measurements, fabric settings, and the designer’s judgment—not as a substitute for a fitting decision.
What is the advantage of POM and grading tools?
POMs make it easier to check specified garment measurements, while grading tools help apply planned measurement changes across sizes. Reviewing those graded patterns on a range of avatars can help a team spot proportional differences without redrafting every size by hand.
Can active students get a CLO individual subscription and a student discount?
Active students at accredited universities can qualify for a CLO individual subscription license. Eligible students may receive a student discount when appropriate enrollment documentation is submitted through CLO’s user support team for verification. Students should confirm the current documentation and verification process with CLO.
Is CLO Academy included with an individual subscription?
CLO Academy is free for all individual subscribers, including active students. It currently does not offer quizzes or certificates of completion. CLO provides a separate paid certification exam called "CLO Verified"; successful candidates receive an official CLO certificate verifying proficiency in the specific version of the software used during the test.