I made this to control my smart home from a small 3D model of my flat, and thought some of you might like it. Here’s what it does:

• Build your home in 3D in the browser. Trace rooms on a grid and drop furniture from a catalog, with a live 3D preview.
• Objects bound to real devices. Clicking a lamp toggles the real light. Lamps light the room and cast shadows, and the sun moves with the time of day.
• Auto-generated widgets. A side panel with a widget for each device, grouped by room.

Free, open source, installs through HACS: https://github.com/CarlesRojas/ha-diorama

Feedback welcome!