A letter to Nuno, 16 years ago — Comparison of Waistband Curvature by Waist Position( Analysis #001)

3D: Lock avatar waist level & pelvic tilt → Flatten the waistband line → Compare curvature front/back & left/right

Pattern Clinic PRO — Analysis #001

We lock avatar/fabric/sim and vary only the wearing position to log waistband angle/curvature changes. Examples are simplified for simulation; reinterpret for brand/fabric/size policies in production.

Principle #001

A letter to Nuno, 16 years ago — #011: The waistline is not a parallel shift

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Purpose

Quantitatively observe and record the structural impact of wearing position (low/mid/high) on waistband angle & curvature (shape) and CF/CB behavior.

Low/Mid/High waistline reference (same avatar, A-pose).

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Analysis Protocol

Lock

• Avatar: size, anatomical waist level, neutral pelvic tilt, A-pose

• Simulation: gravity ON, collision/particle settings fixed

• Fabric: same preset (interlining/fusing identical)

• Pattern: variable is only the waistband curve by wearing position

Variable

• Wearing position: Low / Mid / High (bottom position relative to the waistline reference)

Procedure

1. For each waist position, flatten (2D) the corresponding waistband curve

2. Dress in 3D at each position to match that waistband

3. Record the observation points using the same criteria

   • Option: Capture Strain Map as a supporting indicator

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Observation Points

1. CB/CF tilt

   • Did the waistband at the back (CB) or front (CF) rise / stay level / drop?

   • Log: CB: up/level/down, CF: up/level/down

2. Tilt near the side seam

   • Which way does the waistband lean near the side seam?

   • Log: SS-front: up/level/down, SS-back: up/level/down

   From here on, this section is for paid subscribers only.
   The rest includes the complete checklist, the logging template, and overlay guides for 3D and 2D.