---
title: "Vertex Map Shader"
url: "https://help.maxon.net/c4d/en-us/Content/html/XSLAVERTEXMAP.html"
section_path: "Material Manager > Classic Materials > Classic material > Channel Shaders > Vertex Map Shader"
element_id: "XSLAVERTEXMAP"
description: "The Vertex Map shader works well with Subdivision Surfaces — ensure that each Vertex Map tag has a unique name."
---

# Vertex Map Shader

![Image: 004454.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/004454.jpg)\
Left a Vertex map, right Vertex Colors, each with Viewport and rendered versions.

The Vertex Map shader works well with Subdivision Surfaces — ensure that each Vertex Map tag has a unique name.

With this shader you can do the following:

- Render Vertex Map tags as grayscale images. Areas with maximum weighting will be rendered white and areas with minimum weighting will be rendered black.
- Render Vertex Color tags. Note that an alpha channel in a Vertex Color tag will only be evaluated for rendering if the same shader is also used in the Alpha channel.

Make sure to assign unique names to the tags.