Earlier quoted context omitted.
Yup, had to get it out quick so I went simple! Just a single SVG that I shift elements back and forth on, and rotated so it looks like it's floating!
So it's not actually 3-D, you shift, scale, and rotate the 2-D elements so it appears 3-D? Or are you rotating it along Z in some way. It's a really good effect. That's some skill!
You just described 3d projection, aka how most 3d games display a 3d world on a flat monitor.