Texture Toolbox

A Unity Editor window for batch processing textures — resize, reformat, pad to power-of-two, set mipmaps, pack RGBA channels, and build texture atlases — all from a single panel.

Demo

Overview

Working with large texture libraries is slow when settings must be changed one at a time. The Texture Toolbox processes every texture in a selected folder in a single pass, applying whichever combination of operations you enable, then logs the results in the same window.

Features

• Batch Folder Processing: Point the tool at any Assets/ subfolder and process all textures in it at once.
• Resize: Resample textures to a target width and height.
• Change Format: Apply any TextureImporterFormat (e.g., DXT5, RGBA32, ASTC) across the entire folder.
• Pad to Power of Two: Ensure every texture dimension is the nearest power-of-two.
• Mipmap Control: Enable or disable mipmap generation on all textures.
• Channel Packing: Combine up to four grayscale (or full-color) textures into a single RGBA texture — useful for ORM / mask maps.
• Texture Atlas Builder: Pack a folder of textures into a single atlas with configurable max resolution (512 – 8192) and per-sprite padding.
• Operation Log: Results and errors for every processed asset are shown in a scrollable log at the bottom of the window.

Prerequisites

• Unity (2021.3 LTS or newer recommended).
• Place Scripts/TextureToolbox.cs inside an Editor/ folder in your Unity project.

Usage

1. Drop Scripts/TextureToolbox.cs into any Editor/ folder (e.g., Assets/Editor/).
2. Open the window via Tools > Texture Toolbox.
3. Set the Input Folder (type a path, use the ... picker, or drag a folder from the Project window).
4. Enable the desired operations and configure their settings.
5. Click Process All Textures in Folder to apply all enabled operations.

Operations Reference

Operation	Controls	Description
Resize	Width, Height	Resample to exact pixel dimensions
Change Format	Format dropdown	Set TextureImporterFormat for all textures
Pad to Power of Two	Toggle	Pad dimensions to the next power-of-two
Set Mipmaps	Generate Mipmaps toggle	Enable or disable mip generation
Channel Pack	R/G/B/A texture fields	Merge four textures into one RGBA output
Build Atlas	Max Size, Padding	Pack folder textures into a sprite atlas

Script Reference

Scripts/TextureToolbox.cs

• ProcessFolder(): Iterates all texture assets in _inputFolder, applies enabled operations via TextureImporter, and triggers a reimport.
• DoChannelPack(): Reads RGBA pixel data from four source textures and writes them into a new combined Texture2D asset.
• BuildAtlas(): Calls Texture2D.PackTextures() on all textures in the folder with the configured max size and padding, then saves the result as a PNG.

License

This project is licensed under the MIT License - see the LICENSE file for details. Copyright (c) 2025 ARGUS