No multi-pane view here, since mouse position is not synced.
But between Layout debugging and the 3d view, @polypane.app gives you a (super janky) noclip debug mode 🤯
Video
Kilian Valkhof
I'm porting Quake to 3D CSS, so it runs in the browser without WebGL. It's open source 👹
Play it! cssquake.com
Repo: github.com/LayoutitStud...