02. Deformed Mesh

Purpose

When wearing layered outfits (especially outerwear), mesh overlapping issues may occur.
To prevent this, a Deformed Skeletal Mesh (volume-reduced mesh) should be prepared and applied.

Why a Deformed Mesh Is Needed

inZOI allows wearing multiple clothing layers simultaneously.
Examples: Top + Outerwear + Bottom

However, standard tops have volume (arms/chest/sides), and when combined with outerwear, issues may arise:

  • Mesh clipping or poking through
  • Masking alone cannot fully resolve it
  • Unnatural or visually broken outfit results

→ For clothing that might overlap, create a reduced-volume version of the mesh
and configure it to auto-switch when worn with outerwear.

When Do You Need a Deformed Mesh?

Clothing Type Required Notes
Loose Tops (hoodies, sweatshirts) Yes High risk of overlap around chest/arms
Jumpsuits, Dresses Yes Covers multiple body areas
Wide Pants Yes Volume in thighs/hips may cause overlap
Leggings, Tight Tops No Tight fit → no overlap

How to Create One (Summary)

1. Duplicate the Base Mesh
- Copy the original FBX file and use it to create a separate deformed version.

2. Reduce Volume
- Slightly reduce volume in overlap-prone areas (chest, arms, abdomen, hips).
- Keep rigging/skeleton unchanged.
- Avoid flattening too much → aim for subtle and natural reduction.

3. Keep UVs Identical
- UV1: For textures
- UV2: For masking
- UV channels must match the base mesh exactly.

File Naming Convention

There’s no strict rule in inZOI Modkit, but the following naming is generally used:

Base Mesh Name + _Jacket

Base Mesh Name Deformed Version Name
F_Costume_Top001 F_Costume_Top001_Jacket
M_Costume_Pants001 M_Costume_Pants001_Jacket

If the _Jacket version is imported into Modkit, it will be automatically used when worn with outerwear.

Importing into Modkit

  1. Launch Modkit
  2. Click Import Deformed Mesh
  3. Select the FBX with _Jacket suffix
  4. Choose the same skeleton as the base mesh
  5. Click Import

Behavior When Wearing

Situation Mesh Used
Worn alone Base Mesh
Worn with outerwear _Jacket Deformed Mesh (auto-applied)

Mistake Prevention Checklist

Check Item Notes
Is the skeleton structure identical? ✅
Are both UV1 and UV2 included? ✅

Summary

  • Only prepare Deformed Meshes when overlap may occur.
  • UV channels and skeleton must match the base mesh.