Below is a complete, self‑contained HTML file that creates a 3‑D WebGL scene of the seastead you described. It uses Three.js (r128) and OrbitControls so you can rotate, zoom and pan the view. The scene shows the 80 ft triangular frame, the rectangular living area with windows, the three NACA‑foil legs (half‑immersed), solar panels, the net, steps, a RIB boat, a davit/crane, and a semi‑transparent water plane at the half‑submerged level.
You can save the code as an `.html` file (e.g. `seastead.html`) and open it in any modern browser.
```html
Seastead 3‑D Scene
Drag to rotate • Scroll to zoom • Right‑click to pan
```