# Get Alpha

## Overview

![The Get Alpha Node.](https://2628349686-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fwnv17cpjDin2deSlOz0z%2Fuploads%2Fgit-blob-f91291eb695d84f94e708fb15ca2fb307d86e276%2Fgetalphaupdatedimage.png?alt=media)

**Get Alpha** returns the *alpha* value of the color space of an **Object** in a **Scene**. The **Object ID** is given as input to the **Node**.

The **Get Alpha** **Node** only works with **Objects** that have **Attributes** from the **Sprite** category, such as [**List**](https://github.com/cgi-studio-gmbh/incari-doc/blob/2023.1/objects-and-types/scene-objects/list-widget.md), **Image Sequence**, **Web Sprite**, [**Sprite**](https://github.com/cgi-studio-gmbh/incari-doc/blob/2023.1/objects-and-types/scene-objects/sprite.md), and [**Text**](https://github.com/cgi-studio-gmbh/incari-doc/blob/2023.1/objects-and-types/scene-objects/text.md).

[**Scope**](https://docs.incari.com/incari-studio/2023.1/overview#scopes): **Scene**, **Function**, **Prefab**.

## Attributes

![The Get Alpha Node Attributes.](https://2628349686-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fwnv17cpjDin2deSlOz0z%2Fuploads%2Fgit-blob-5d6978e34defad41eaf103467f3e1c1362401775%2Fnode-get-alpha-attr.png?alt=media)

| Attribute | Type         | Description                                                                                                                 |
| --------- | ------------ | --------------------------------------------------------------------------------------------------------------------------- |
| `Object`  | **ObjectID** | The **Object**, whose `Alpha` **Attribute** value you wish to return, if one is not provided in the `Object ID` **Socket**. |

## Inputs

| Input             | Type         | Description                                                           |
| ----------------- | ------------ | --------------------------------------------------------------------- |
| *Pulse Input* (►) | **Pulse**    | A standard **Input Pulse**, to trigger the execution of the **Node**. |
| `Object ID`       | **ObjectID** | The **Object** whose `Alpha` **Attribute** value you wish to return.  |

## Outputs

| Output             | Type      | Description                                                                                                                            |
| ------------------ | --------- | -------------------------------------------------------------------------------------------------------------------------------------- |
| *Pulse Output* (►) | **Pulse** | A standard **Output Pulse**, to move onto the next **Node** along the **Logic Branch**, once this **Node** has finished its execution. |
| `Alpha`            | Float     | The *alpha* value of the **Object**.                                                                                                   |

## See Also

* [**Set Alpha**](https://docs.incari.com/incari-studio/2023.1/toolbox/incari/object/set-alpha)

## External Links

* [*Alpha compositing*](https://en.wikipedia.org/wiki/Alpha_compositing) on Wikipedia.