---
title: "Clean-up Tunnel"
slug: "cyclone-3dr-cleanuptunnelc"
updated: 2026-09-07T11:51:31Z
published: 2026-09-07T11:51:31Z
canonical: "rcdocs.leica-geosystems.com/cyclone-3dr-cleanuptunnelc"
---

> ## 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.

# Clean-up Tunnel

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

This command allows you to create a mesh based on the points located on the walls and on the ground of a tunnel point cloud.

You can also use it to clean a tunnel point cloud. For example, this command can be used to separate cars, tripods, catenaries and any support.

> [!TIP]
> ### Requirements
> 
> Select both point cloud and neutral axis corresponding to the tunnel (the neutral axis can be a line, a polyline or a CAD curve). Then launch the command.

---

1. Set the **level of details.**
2. Choose which **Point clouds** will be created.
3. Choose to create a **Tunnel mesh** from point cloud **On the Tunnel**.

> [!WARNING]
> ### Notes
> 
> 1. **Level of details**:
>   1. The main option is **Extraction Step**. You must understand it as a sampling rate. Therefore, if you decrease the value, the extraction accuracy should increase. However, the calculation time will increase at the same time.
>   2. The choice of the **Extraction step** parameter depends on the shape of your tunnel. Thus, you must try several values or the second option. The additional option **Try to keep details** is useful when you want to keep details on the walls or with irregular cross sections along neutral axis. However, this algorithm can be time-consuming.
> 2. **Created Mesh**: this mesh can be either a mesh which vertices are located on points from the initial point cloud (**Measured points** option), a **Regular** mesh or a **Refined** mesh.
>   1. The **Measured points** option is the fastest extraction.
>   2. The **Regular** option re-samples the mesh to better fit the point cloud.
>   3. The **Refined** option is mostly interesting in case of sharp edges like curbs and platforms.

---

> [!TIP]
> ### Practice
> 
> - [Extract a tunnel mesh](/v1/docs/cyclone-3dr-extracttunnelmesh)