There are numerous open-source Python scripts on GitHub tailored to parse specific data formats (like Unity .meta files or Spine .atlas files) and slice the images using the Pillow library.
You might think, "I just save my PSDs. I don't need this." But consider these scenarios:
If you don't have a data map, you must rely on . Tools like Shoebox or specialized Python OpenCV scripts scan the atlas for transparent pixels (alpha channels). The tool draws a bounding box around any solid cluster of pixels completely surrounded by transparency. Limitations of Mapless Extraction: texture atlas extractor
Note: This script ignores trimming offsets for brevity; a production script must include offset math.
A good extractor automatically removes internal padding (the 1-2 pixel gutter around each sprite) and returns the sprite to its original size without the gutter. There are numerous open-source Python scripts on GitHub
You are moving assets from one engine (like Starling or Cocos2d) to another (like Godot or Unity). Top Tools for Texture Atlas Extraction
What I evaluated (assumed reasonable defaults) Tools like Shoebox or specialized Python OpenCV scripts
A texture atlas (also known as a "sprite sheet" in 2D games or "UV map layout" in 3D) is a single large image file containing many smaller sub-textures.
This comprehensive guide covers everything you need to know about texture atlas extractors, how they work, and the best tools to unpack your assets efficiently. What is a Texture Atlas?