---
title: "Un-premultiply"
url: "https://help.maxon.net/c4d/en-us/Content/html/NET_MAXON_PATTERN_NODE_EFFECT_UNPREMULTIPLY.html"
section_path: "The Node Editor > The individual Assets > Color > Un-premultiply"
element_id: "NET_MAXON_PATTERN_NODE_EFFECT_UNPREMULTIPLY"
description: "This page documents the Un-premultiply node of the classic node materials in Cinema 4D. It reverses alpha premultiplication — restoring pure color values …"
---

# Un-premultiply

> **Note:** **What is it about?**
>
> This page documents the **Un-premultiply node** of the classic node materials in **Cinema 4D**. It reverses alpha premultiplication — restoring pure color values for correct further processing.

This node is a reversal of the Premultiply Node. If color portions with the unmodified opacity of the Alpha channel were multiplied by the Premultiply Node, the Un-premultiply Node works with the opposite value of the Alpha channel to multiply the color portions. A combination of Premultiply and Un-premultiply will then restore the original color value. The input Alpha channel will also remain unchanged with Un-premultiply.