---
title: "Calculate Curvature"
url: "https://help.maxon.net/c4d/en-us/Content/html/NET_MAXON_NEUTRON_ASSET_GEO_CALCULATECURVATURE.html"
section_path: "The Node Editor > The individual Assets > Geo Modifier > Calculate Curvature"
element_id: "NET_MAXON_NEUTRON_ASSET_GEO_CALCULATECURVATURE"
description: "This page documents the Calculate Curvature node of the Scene Nodes system in Cinema 4D. It writes surface curvature into a weight map based on …"
---

# Calculate Curvature

> **Note:** **What is it about?**
>
> This page documents the **Calculate Curvature node** of the Scene Nodes system in **Cinema 4D**. It writes surface curvature into a weight map based on point-normal angles — a data source for masks that follow edges and creases.

This Node adds a weight map to a geometry. The values of the weight map range between 0% and 100% and indicate the angles between the neighboring point normals.

![Image: R25_CalculateCurvature.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/R25_CalculateCurvature.jpg)\
The Node calculates weight values for vertices based on the surrounding surface normal. In this example the weight information is converted to a selection using the Select by Weight Node.