---
title: "Basic Tutorial | Extrude a profile"
slug: "cyclone-3dr-exercise-extrude-a-profile-to-design-a-tube"
updated: 2026-09-07T11:51:19Z
published: 2026-09-07T11:51:19Z
canonical: "rcdocs.leica-geosystems.com/cyclone-3dr-exercise-extrude-a-profile-to-design-a-tube"
---

> ## 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.

# Basic Tutorial | Extrude a profile

> [!TIP]
> Open the file **CrossSections.3dr** ([download](https://www.cyclone3dr.com/download_helper.php?File=Cyclone3DRSampleData/CrossSections.3dr)).

This file contains a theoretical section as well as the neutral axis of a tunnel.

Show only **Neutral axis** and **Theoretical section**.

Select the **Theoretical section** and go to [Profile along a Path](/v1/docs/cyclone-3dr-extrudedmeshprofileandpathc). Click on the neutral axis. Deselect all the options and click **Preview**. The result is not as expected because the profile has moved along the path but it has not turned with the path (only translations). Select now the option **Turn with the path** and click **Preview** again. A theoretical tunnel is now created as expected.

> [!WARNING]
> ### Note
> 
> - Use the **Profile base point** to define the profile origin.
> - To fully manage the super elevation (or roll), you will have to define a **Second path** and a **Profile lean point**.
> - The option **Close extremities** will close the two holes at the beginning and at the end of the extruded mesh.

![extrude profile.png](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/extrude%20profile.png)

Extrusion along a path