Hello, of course we have that too.
I'm glad a Spine tip worked exactly as intended: getting you curious about a particular aspect of Spine you could also do! π
Here's some resources about meshes (the third one features several cubes):
Blog: Mesh creation tips: vertex placement
Blog: A taxonomy of meshes
Blog: Mesh weight workflows
Here we explain how this same setup was used on heads:
Owl example: Head
Mix and Match example: Face control
We also show this technique in several occasions during lives on twitch, here's the page that collects them all:
Spine: Twitch
hint: If you search for "head control" or "2.5D" in the page, you'll be able to find the exact moments during the streams where these explanations take place, plus, there's also several examples you can download. π