---
title: "Ln"
url: "https://help.maxon.net/c4d/en-us/Content/html/COM_REDSHIFT3D_REDSHIFT4C4D_NODES_CORE_RSMATHLN.html"
section_path: "The Node Editor > Redshift Nodes > Redshift Math Nodes > Math Float Nodes > Ln"
element_id: "COM_REDSHIFT3D_REDSHIFT4C4D_NODES_CORE_RSMATHLN"
description: "This page covers the Ln node of the Redshift renderer in Cinema 4D. It returns the natural logarithm of its input — for logarithmic remapping of values …"
---

# Ln

> **Note:** **What is it about?**
>
> This page covers the **Ln node** of the Redshift renderer in **Cinema 4D**. It returns the natural logarithm of its input — for logarithmic remapping of values, e.g. compressing large ranges.

Returns the natural logarithm (to base *e*) of *Input*.

> **Note:** This is the inverse function of Exp.

## In this section

- [Preview](https://help.maxon.net/c4d/en-us/Content/html/COM_REDSHIFT3D_REDSHIFT4C4D_NODES_CORE_RSMATHLN-NET_MAXON_NODE_BASE_PREVIEW.html.md)
- [Basic](https://help.maxon.net/c4d/en-us/Content/html/COM_REDSHIFT3D_REDSHIFT4C4D_NODES_CORE_RSMATHLN-NET_MAXON_NODE_BASE_GROUP_BASIC.html.md)
- [Inputs](https://help.maxon.net/c4d/en-us/Content/html/COM_REDSHIFT3D_REDSHIFT4C4D_NODES_CORE_RSMATHLN-NET_MAXON_NODE_BASE_GROUP_INPUTS.html.md)
- [Outputs](https://help.maxon.net/c4d/en-us/Content/html/COM_REDSHIFT3D_REDSHIFT4C4D_NODES_CORE_RSMATHLN-NET_MAXON_NODE_BASE_GROUP_OUTPUTS.html.md)