---
title: "Replace a Part"
slug: "cyclone-3dr-replaceapartc"
updated: 2026-09-07T11:51:53Z
published: 2026-09-07T11:51:53Z
canonical: "rcdocs.leica-geosystems.com/cyclone-3dr-replaceapartc"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://rcdocs.leica-geosystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Replace a Part

![CmdReplaceAPart.svg](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/CmdReplaceAPart.svg)

This command deletes triangles and vertices inside a zone and replaces this local area with a new smoothed mesh.

> [!TIP]
> ### Requirements
> 
> Select a mesh and launch the command.

1. Draw a contour with the left button of the mouse around the area to replace. The processing of the area starts when you release the left button.
2. The triangles of the selected zone will be removed and replaced with a smooth mesh.
3. If you don't select any **Options**, the software will replace the selected area by big triangles. However, in most of the cases, it is interesting to **Add points inside holes** of the selected area. If you select the **Curvature Filling** option, points are added to make a surface continuous with the border of the area to replace. The tension may be adjusted with the slider.
4. As soon as you have replaced a part, you can select another part selecting a new area to replace that may overlap with the previous zones.

> [!TIP]
> ### Tips & Tricks
> 
> If the selected zone includes holes, they are removed and filled. Then, this command may be interesting to use instead of the commands [Clean / Separate Mesh](/v1/docs/cyclone-3dr-cleanseparatemeshc) and [Fill Holes](/v1/docs/cyclone-3dr-fillholesc) if you need to clean the border AND fill a hole.