---
title: "Apply Mask"
description: "Local-first visual environment for building and running AI workflows. Build agents visually, deploy anywhere, privacy by design."
canonical: https://docs.nodetool.ai/nodes/lib/image/mask/applymask
markdown: https://docs.nodetool.ai/nodes/lib/image/mask/applymask.md
product: NodeTool
source: https://github.com/nodetool-ai/nodetool/blob/main/docs/nodes/lib/image/mask/applymask.md
---

# Apply Mask

**Type:** `lib.image.mask.Apply`

**Namespace:** `lib.image.mask`

## Description

Multiply a coverage mask (read from mask.a) into the source's alpha. RGB unchanged.
    image, mask, apply, alpha

## Properties

_(none)_

## Outputs

| Output | Type | Description |
|--------|------|-------------|
| output | `image` |  |

## Related Nodes

Browse other nodes in the [lib.image.mask](./) namespace.