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Unity Standard Shader with Custom Clipping Planes

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.

For a project of mine, I wanted to have custom clipping planes for objects, so that if an object is intersection with another, it would hide any part after the intersection.

It looks like this:

I decided to extend the Standard shader provided by Unity3D to achieve this effect.

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.

Hi, I have just reset my blog.

If you're here looking for my old stuff, you can find them on the internet archive.