---
title: 3D Masking
slug: studio-guide-n/3d-masking
docTags: 
createdAt: 2024-09-02T08:34:13.133Z
---

:::hint{type="danger"}
**❗️caution**

The structure of clothing items in ZEPETO is having a clothing object overlaid on top of the basic body form of the character. Thus, there inevitably becomes meshes that coexist between the clothing object and the BaseBody. As a result, the polygon count as well as the file size are increased.

The areas colored black during the masking process are not read by Unity when converting your item to a prefab file. Therefore, you must undergo the masking process to reduce the polygon count and file size.
:::

# STEP 1 : Preparing Masking

First, import the downloaded [3D Mask Object File](docId\:pLlr2xqd6_CGcfIqq4DnT)  and the created item object.

# STEP 2 : Masking

Select Paint Vertex Tool from Modeling > Mesh Display.



![2022](https://api.archbee.com/api/optimize/fCt3n1oCa8rgNJ8fw9I2N-mQgFxOIoivD0D31Y5cAxE-20240904-102326.jpeg)

Set the color value as 0, 0, 0 and paint on the BaseBody on the inside where it overlaps with the clothing.




![1709](https://api.archbee.com/api/optimize/fCt3n1oCa8rgNJ8fw9I2N-PCGabM4aNlBwZ5tzBE0LY-20240904-102326.jpg)



:::hint{type="danger"}
❗️**caution**

The areas colored black should not be shown outside the clothing. The BaseBody areas that are exposed outside the clothing object must be in white.
:::

![2272](https://api.archbee.com/api/optimize/fCt3n1oCa8rgNJ8fw9I2N-RlxqeVqCyaf5qXU5DG8Do-20240904-102326.jpg)

# STEP 3 : Finishing

When the masking process is complete, select the mask, item object, and joint objects in the Outliner and export them as an FBX file.