---
title: "Scalar User Data"
url: "https://help.maxon.net/r3d/3dsmax/en-us/Content/html/Scalar%2BUser%2BData.html"
section_path: "Shaders > Attributes Shaders > Scalar User Data"
description: "Attribute scalar data can be stored per object or per point on a point cloud. This shader node gives you access to that attribute data, facilitating …"
---

# Scalar User Data

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# Scalar User Data

## Introduction

Attribute scalar data can be stored per object or per point on a point cloud. This shader node gives you access to that attribute data, facilitating object or point shading variation without requiring different materials.

> **Important:** User Data does not work with volume shading.

## Parameters

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| ![Image: 3ds_Scalar_User_Data_UI.png](https://help.maxon.net/r3d/3dsmax/en-us/Content/Resources/Images/3ds_Scalar_User_Data_UI.png) |

### Attribute Preset

This dropdown sets the user data with the following preset options:

- User-defined
- Opacity
- Object ID
- Material ID
- Particle ID
- Particle normalized lifetime
- RS Multi-map - node handle hash
- RS Multi-map - node name hash
- RS Multi-map - particle ID hash
- Max Hair - strand opacity
- Max Hair - strand specular
- Max Hair - strand gloss
- Thinking Particles - Multi-Mtl offset
- Thinking Particles - Multi-Mtl num subs

### Attribute Name

> **Note:** Only works when "User-defined" is set as the Attribute Preset.

The name of the user attribute assigned to the object or point cloud.

### Default

This is the value that will be output by the shader if the attribute is not found on the object or point cloud.