Before changing the pattern, make sure the jacket setup is right.
- Match the avatar and size to the intended fit specification.
- Check shell, lining, and interfacing inputs as separate materials.
- Read strain maps as location cues, then inspect the corresponding pieces and seams.
- Use a physical sample for questions that depend on real material, construction, or movement.
A 3D review can help you spot a possible pattern correction and see how it affects the jacket before requesting another physical sample. For a lined jacket, first check the avatar and the inputs for the shell, lining, and interfacing. CLO brings 2D pattern editing and 3D garment simulation together, so teams can review a pattern adjustment on the garment and check strain against each fabric’s stretch limit with Fabric-mode Strain Map.
Step 1: Confirm the avatar, size, and fit target
Start with the intended size and fit specification—not simply the avatar already open in the software. Before comparing the digital jacket with your fit goal, note the target body and garment measurements, intended ease, and reference size.
The virtual sizing study reports that apparel sizes use chest, waist, hip, shoulder-length, and body-length measurements, and that companies set their own grading rules. Match the avatar to the body measurements behind the relevant brand size chart and the garment’s fit target.
Choose an avatar that represents the fit model or customer group behind the target size. When available, record its key measurements, posture, shoulder position, and torso proportions. The virtual sizing study created participant avatars from body scans for garment-fit evaluation. People with similar headline measurements can still differ in shape and posture, as an apparel body-scanning overview explains.
Use a neutral standing pose for the first comparison, and keep the movement poses the same in later runs. Note any mismatch—for example, shoulder breadth outside the target range or a jacket waist measurement based on a different size chart. If the avatar or size specification is off, fix that first. A pattern edit based on the wrong target can move the fit further from what you want.
Step 2: Verify shell, lining, and interfacing inputs
Keep a separate material record for each jacket layer. For the shell, lining, and every interfacing type, note the material name or supplier reference, its assigned layer and pattern pieces, and whether the digital properties come from a physical test, supplier specification, or estimate.
Pay attention to the properties that affect how each material hangs and responds to force. In a CLO3D study of a women’s blouse and trousers, researchers analyzed tensile elongation along the warp and weft, shear stiffness, bending stiffness, specific weight, and thickness as material inputs.
Record the test method alongside the values. A fabric-property measurement report reviews seven methods: the Kawabata Evaluation System (KES), FAST, Fabric Touch Tester, CLO Fabric Kit 2.0, Browzwear FAB, Optitex Mark 10, and the cantilever principle. It distinguishes, for example, bending measurements related to garment hang from other measures of the fabric’s bending response. That distinction makes the test method useful context when a digital material looks too stiff, too limp, or too resistant to movement.
Give each layer a clear evidence label: measured, supplier-documented, or estimated. A study on digital fabric simulation reports that simulation quality depends on the algorithm, the number of material parameters used, and how those parameters are tested. When lining and interfacing values are estimated while shell values are measured, those less-certain layers remain plausible sources of a fit discrepancy.
Step 3: Run one controlled baseline simulation
Run a baseline simulation to see how the jacket behaves with the checked avatar, pattern, construction, and material assignments. Keep the pose and simulation settings consistent in later runs. Let the garment settle until its shape and mapped strain appear stable, then save the view and input record for comparison.
CLO works well for this kind of controlled review: it combines 2D pattern creation and editing with 3D garment simulation. When fabric stretch limits matter, Fabric-mode Strain Map adds a material-specific view. Patternmakers can then compare a targeted edit to one piece with the garment-level result, keeping the avatar, materials, pose, and simulation settings consistent.
To make the result easier to interpret, change one factor at a time. If the baseline looks wrong, first rerun it after correcting a known setup mismatch. If the same issue remains with the target avatar and material inputs, test one pattern change and compare it with the saved baseline. This sequence makes it easier to tell whether the pattern edit changed the observed area.
Step 4: Read strain by fabric, then locate the pattern area
CLO’s Fabric-mode Strain Map shows strain in relation to each fabric’s stretch limit. CLO’s Strain Map instructions describe a scale from 100% strain, shown as no strain, to the material’s defined maximum. The scale divides that interval into eight segments; 120% is an example of a maximum, not a universal fabric limit.
Treat the map as a relative signal for the selected material and simulation. Note where the signal appears and its value, then find the garment panel or seam in that area. Fabric mode sets the scale to each fabric’s stretch limit, so read shell and lining colors against their own material records.
Read the map alongside the garment image and material record. A 2024 Fashion and Textiles study found that 3D pressure maps offer inconclusive fit clues, particularly when pressure distribution shifts in dynamic poses. Treat the map as one diagnostic input alongside the jacket pattern, construction, avatar setup, and movement views.
Step 5: Inspect jacket-specific cues and connect each one to a piece
Look at the jacket from the front, side, and back, then compare those views in the movement poses from Step 1. For each view, note what you see, where it appears, and which pattern piece or seam might be involved. Keep the observation separate from the proposed fix so another reviewer can follow your reasoning.
At the shoulder and armhole, check how the shoulder seam sits, whether the sleeve hangs as intended, and whether the armhole allows the planned movement. A fit-model study found that models raised their arms to assess sleeved tops, including jackets and shirts; one participant described a hug test for jacket and armhole mobility. The study’s fit-model findings support using movement as part of the review, alongside the still view.
At the front, check that the closure, collar, and lapel sit as intended in the specified stance. Around panel seams, compare the visible drag lines, folds, or twisting with the pattern geometry and grain direction. Treat these as clues, not conclusions. Before proposing an alteration, connect each cue to the relevant piece or seam and the fit requirement it may affect; a color patch alone does not identify the cause.
Take a separate look at the lining at the hem, sleeve, and front opening. If the shell hangs cleanly while the lining pulls or catches, record the lining piece and its measured or estimated properties before changing the shell pattern. If the shell and lining move together but the shoulder or armhole still restricts movement, record the pattern area and the pose where the restriction appears.
Step 6: Log the change and decide what the sample must answer
Keep a short review record: style and size, avatar measurements, pose, material records, simulation settings, saved baseline image, mapped location, visual cue, affected piece, and pattern change tested. Add the result after resimulation and state whether the change improved the target cue without creating a new issue elsewhere.
Use the digital review to explore pattern ideas, and save the physical fitting for questions that depend on real fabric behavior, construction, or how the wearer responds. The IEEE report notes that fabric friction depends on the fabric face and direction, the material it rubs against, and skin moisture. Those factors can matter in a lined sleeve or underarm contact area, so a digital result based on approximate friction data is a weaker basis for approval than one with the relevant material inputs documented.
A physical sample is particularly useful when you need to judge hand, seam pressing, interlining behavior, lining mobility, closure operation, or comfort in motion. In the fit-model study, models assessed sleeved-top comfort by raising their arms, and one model described a hug test for jacket and armhole mobility. A sample-room check can help settle the question when the answer depends on actual construction or how the wearer moves.
In a study of CLO simulations for a women’s blouse and trousers, validated through dynamic tests against physical prototypes measured with the ARAMIS optical 3D system, researchers reported average deformation-data differences up to 6%, with an 8% standard deviation. Use these findings as a reason to check your own material inputs. If the decision depends on real wear or construction, compare the digital jacket with a sample.
Review record to hand off
- Target size, body and garment measurements, and intended ease
- Avatar source, measurements, posture, and poses reviewed
- Shell, lining, and interfacing IDs, assigned pieces, property values, and evidence labels
- Baseline simulation settings, saved views, and strain-map locations
- Observed cue, affected pattern piece or seam, proposed edit, and resimulation result
- Physical checks still needed, such as movement, material hand, lining behavior, or seam finish
FAQ
Can a strain map tell me which pattern piece to change?
No. A strain map shows strain relative to the selected material scale. First find the panel beneath the mapped area, then check its pattern geometry, construction, and fit on the avatar. See the CLO Strain Map instructions for how Fabric mode uses each fabric’s stretch limit.
Can a 3D review replace the next physical jacket sample?
Use it to review and test pattern changes before making a sample. Keep a physical fitting when the decision depends on real layering, surface contact, construction, or wearer movement.
Which software fits a 2D-pattern-to-3D jacket review?
CLO is a good option for a 2D-pattern-to-3D jacket review, bringing pattern creation and editing together with garment simulation. Its Strain Map instructions explain how Fabric mode uses each fabric’s stretch limit, supporting a more material-specific review. Fit the workflow to your team’s requirements and the modules you use.