---
title: "Guided Workflow | Clean an LGSx Cloud"
slug: "cyclone-3dr-exercisemodifyalgsxfile"
updated: 2026-09-07T11:51:31Z
published: 2026-09-07T11:51:31Z
canonical: "rcdocs.leica-geosystems.com/cyclone-3dr-exercisemodifyalgsxfile"
---

> ## 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.

# Guided Workflow | Clean an LGSx Cloud

> [!NOTE]
> The file used in this tutorial is **CloneLGSx.lgsx** ([download](https://www.cyclone3dr.com/download_helper.php?File=Cyclone3DRSampleData/CloneLGSx.lgsx))**.** The file contains the scan of a hallway with 3 setups.

In this exercise, we will update the cloud content of an LGSx file.

The steps will be as follows:

- Import the LGSx file and convert the desired area.
- Use **Distance from Scanners** and **Auto Classification** commands to clean the cloud.
- Finally, use **Clone LGSx** to update the cloud and keep the information associated with the LGSx file.

## Import the LGSx file

1. Create a new document
2. From the **File** menu, go to the Import entry and import the file from the file explorer. Once the file has been selected, the [Import LGSx](/v1/docs/cyclone-3dr-loadlgsfilec) command will open.
3. Since we are going to update the file, select **Import LGSx** in the **Import Mode** group to keep it associated with the project.
4. Click **Import** to open it.

![image-20251021-072348.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/image-20251021-072348.png)

> [!NOTE]
> If you don't see the positions, you can click on **Show Hide positions** in the [Image Navigation Toolbar](/v1/docs/cyclone-3dr-imagenavigationtoolbar) to display them, or press **SHIFT+S**.

## Convert the CloudWorx cloud to a standard cloud

1. Launch [Convert Project](/v1/docs/cyclone-3dr-convertprojectc).
2. Enter a value of 2 millions for the **Maximum number of points** value.
3. Import the intensity.
4. It is not necessary to process and import images.

A new cloud has been created and the original cloud is hidden. From now, we will work on the created cloud.

## Cleaning the cloud using Distance from Scanners

1. Select the cloud and launch [Distance from Scanner](/v1/docs/cyclone-3dr-restrictrangefromscannerpositionc).
2. For the **range**, select a minimum value of 0 m and a maximum value of 5 m.
3. Keep only the **inside range clouds**
4. Click **OK** to validate.

## Cleaning the cloud using Auto Classification and Separate by Attributes

Now that we removed the furthest points, we will use **Auto Classification** and **Separate by Attributes** to keep only the most important parts.

This step is optional: you can go to the next section if your computer doesn't meet classification requirements.

1. Select the cloud and launch [Auto Classification](/v1/docs/cyclone-3dr-cloudautoclassificationc).
2. Select the **Indoor** model and click **OK**.
3. Select the cloud again and launch [Separate by Attributes](/v1/docs/cyclone-3dr-separatebyattributesc).
4. Select **Classification** as attribute, and click **Preview**. You will see all classes present in the cloud.
5. Keep only the most meaningful classes: Wall, Ceiling, Floor, Door, Window, Stairs and delete the others.
6. Group the resulting clouds, then click **OK** to validate.

![image-20251021-072500.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/image-20251021-072500.png)

## Clone LGSx

Now that we have cleaned the cloud, we can use it to update the content of **CloneLGSx.lgsx**.

1. Select the cleaned cloud, and launch [Clone LGSx](/v1/docs/cyclone-3dr-clonelgsxc).
2. In the **Inputs,** you can see the original cloud (that is why it is important to import it instead of a direct conversion) and the cloud that we worked on.
3. In the **Outputs,** you can see that we added the classification and that we still have the 3 setups.

By separating the setups, it would also be possible to remove entirely a setup (take a look at the [Scan Stations](/v1/docs/cyclone-3dr-explodebyscanstationc) command)
4. Click **Clone** and in the explorer select where you want to save it. A new LGSx file has been created with the new cloud.

Finally, you can import this new LGSx file, including images, in a new project to check that:

- you still have 3 stations,
- you have the Classification by choosing the Classification Representation,
- all original images are preserved.