Unity Channel Packer Tool

ChannelPackerTool - A Unity Editor tool for packing and unpacking texture channels.

Pack up to four grayscale textures into one RGBA texture or unpack an RGBA texture into separate R, G, B, A grayscale images. Perfect for optimising textures in Unity projects!

Features:

• Pack four textures into one RGBA image.
• Unpack RGBA textures into grayscale R, G, B, A images.
• Preview packed textures in the Unity Editor UI.
• Supports fallback colours (Black, Gray, White) for unassigned channels.
• Invert channels for flexibility.
• Progress bar for large textures (e.g., 4K).
• Handles non-readable textures with fix prompts.

Installation:

1. Download ChannelPackerTool.cs from this page or GitHub.
2. Place it in your Unity project’s Assets/Editor folder (create the Editor folder if needed).
3. Open via Tools > Channel Packer Tool in Unity.

Usage:

Pack:

1. Assign grayscale textures to R, G, B, or A slots.
2. Set fallback colours for unassigned channels.
3. Check Invert to flip channel values if needed.
4. Click Pack and save the output PNG.

Unpack:

1. Assign an RGBA texture to the source slot.
2. Select channels (R, G, B, A) to extract.
3. Click Unpack and choose an output folder for grayscale PNGs.

Requirements:

• Tested in Unity 6000.1.5f1 (likely works in Unity 2021.3 or later).
• Textures must have Read/Write enabled in import settings.

Credits:

Developed by Richard/NotMyFirstNull with significant contributions from Grok (xAI) and ChatGPT.

License:

MIT License. Free to use with attribution.

Contributing:

Found a bug or have a feature idea? Open an issue at GitHub or fork the repo to submit changes.

Get packing and optimise your textures today!