Unity Blog is a great place to learn things; unfortunately it seems that the authors do not update their posts very often.
Please, feel free to use this thread when you find broken links in Unity Blog posts (this thread is not official in any way but it can be useful). Post new links if you can, thank you.
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I found blog posts relative to procedural tilemap generation; they are very interesting but there are broken links in them.
In Procedural patterns you can use with Tilemaps (Part I), the links to:
- ruletile in the presentation of the blog content,
- ruletile and tilemap in “What is this post about?”,
are broken.
Actual links:
- ruletile (in Unity 2D extras): GitHub - Unity-Technologies/2d-extras: Fun 2D Stuff that we'd like to share!,
- tilemap in the documentation: Unity - Manual: Tilemap component reference.
in Procedural patterns to use with Tilemaps – (Part II), the link to the author Twitter account, Ethan Bruins, is dead. Actual link: x.com.
By the way, I encourage everyone who is working on a 3D project to use these extras; the ruletile is particularly “cool” to use. Thanks to @johnsoncodehk and @ChuanXin for sharing them! 
