---
title: "Border Selection"
url: "https://help.maxon.net/c4d/en-us/Content/html/NET_MAXON_NEUTRON_ASSET_GEO_BORDERSELECTION.html"
section_path: "The Node Editor > The individual Assets > Geo Selection > Border Selection"
element_id: "NET_MAXON_NEUTRON_ASSET_GEOBORDERSELECTION"
description: "This page covers the Border Selection node of the Scene Nodes system in Cinema 4D. It selects the edges or polygons along the open boundary of a geometry …"
---

# Border Selection

> **Note:** **What is it about?**
>
> This page covers the **Border Selection node** of the Scene Nodes system in **Cinema 4D**. It selects the edges or polygons along the open boundary of a geometry — useful for treating mesh borders separately, e.g. for thickening or trims.

This selection function can select the edges or the polygons at the open edge of a geometry.

![Image: R25_BorderSelection.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/R25_BorderSelection.jpg)\
This function can select edges or polygons at borders and openings. Here the open edge of a polygon was selected and the extruded.

[![Image: halvar.png](https://help.maxon.net/c4d/en-us/Content/Resources/Images/halvar.png)](https://help.maxon.net/c4d/en-us/Content/Resources/Scenes/R25_BorderSelection.c4d)