This package is just a simple atlas editor.
You can create new, modify existing atlases. The output of this tool will be new Texture2D with all source images and metadata object with new image uv coordinates.
Also this utility can do alpha trimming - cut empty stripes (alpha=0) on an image border
To create new atlas Just drag'n'drop images from inspector, align and save.
Visit the Unity forum thread for feedback, bug reports and feature requests.
Documentation
Latest source code
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