2026 note
I’m in the process of migrating posts from my old blog into this new system.
Rather than rewriting everything, I’m keeping the original structure and tone where possible, and adding light context where it helps. This post originally spanned two entries written in 2014 and 2015. They’re presented together here, in chronological order, with minimal changes.
An update since the post below, a recent pull request has fixed it for later unity versions, so the code below is more for historical purposes.
2015 update: turning the script into a small tool
By 2015, I had cleaned this script up and published it as a small standalone project, along with a short update video.
The code was moved into a GitHub repository so it was easier to reuse and iterate on:
https://github.com/toxicFork/Unity3D-TextureAtlasSlicer
If you’re just here to grab something that works, this version is the one to start from.