# Single packer mode

**Single Packer** window allows you to manually assign source textures and channels for each output channel independently. It is mainly intended for textures with non-standard naming, custom masks, or workflows that cannot be recognized automatically.

<figure><img src="/files/BRnfCyOOC3HlaSr2hKtD" alt=""><figcaption></figcaption></figure>

### Input Channels

Defines how each output channel is constructed from source data.

* **Source Texture**\
  Selects the texture from which the channel data will be extracted.
* **Source Channel**\
  Specifies which channel (R, G, B, or A) of the selected texture is used as the input.
* **Adjustments**\
  Mathematical operations applied to the input pixels to modify or remap the extracted values.

### Output Settings

Output Settings define how and where the generated texture is created. To learn more, navigate to the [**Output Settings**](/output-settings.md) section.

### Preview

Each channel has its own real-time preview showing the exact source channel being extracted, including all applied adjustments.

The final packed texture is displayed in the right-hand side of the window.

**Note:** all previews are approximate and do not account for certain edge cases such as very low output resolution or specific filtering artifacts. This is intentional, as previews are rendered using an optimized material-based approach to ensure fast UI performance.


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