> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# BatchMasksNode - ComfyUI Built-in Node Documentation

> Complete documentation for the BatchMasksNode node in ComfyUI. Learn its inputs, outputs, parameters and usage.

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/BatchMasksNode/en.md)

The Batch Masks node combines multiple individual mask inputs into a single batch. It takes a variable number of mask inputs and outputs them as a single batched mask tensor, allowing for batch processing of masks in subsequent nodes.

## Inputs

| Parameter             | Data Type | Required | Range | Description                                                                                             |
| --------------------- | --------- | -------- | ----- | ------------------------------------------------------------------------------------------------------- |
| `mask_0`              | MASK      | Yes      | -     | The first mask input.                                                                                   |
| `mask_1`              | MASK      | Yes      | -     | The second mask input.                                                                                  |
| `mask_2` to `mask_49` | MASK      | No       | -     | Additional optional mask inputs. The node can accept a minimum of 2 and a maximum of 50 masks in total. |

**Note:** This node uses an autogrow input template. You must connect at least two masks (`mask_0` and `mask_1`). You can add up to 48 more optional mask inputs (`mask_2` through `mask_49`) for a total of 50 masks. All connected masks will be combined into a single batch.

## Outputs

| Output Name | Data Type | Description                                                            |
| ----------- | --------- | ---------------------------------------------------------------------- |
| `output`    | MASK      | A single batched mask containing all the input masks stacked together. |