---
title: "Mask By Smoothness"
url: "https://help.maxon.net/zbp/en-us/Content/html/4_palettes_tool-7-masking-mask-by-smoothness.html"
section_path: "Palettes > Tool Palette > Masking > Mask By Smoothness"
description: "A set of parameters for masking the model to isolate smooth surfaces."
---

# Mask By Smoothness

A set of parameters for masking the model to isolate smooth surfaces.

![Image: 2024-4-tool-palette-geometry-masking-mask-by-smoothness-menu-header.png](https://help.maxon.net/zbp/en-us/Content/Resources/Images/2024-4-tool-palette-geometry-masking-mask-by-smoothness-menu-header.png)

> **Note:** Mask By Smoothness applies a mask based on surface curvature, masking areas with the highest curvature while leaving smooth surfaces unmasked.

> **Note:** ZBrush for iPad Mask By Smoothness parameters work the same way in ZBrush desktop. Learn more in the external ZBrush desktop [Masking](https://help.maxon.net/zbr/en-us/Default.htm#html/reference-guide/tool/polymesh/masking/masking.html) section.