Here is the 3D WebGL scene based on your description. It features the living area, the angled legs extending into the water, the solar panels extending to the sides and back, the cables for structural support, and the thrusters with rotating "banana" propellers.
You can save this code as an `.html` file (e.g., `seastead.html`) and open it in any modern web browser.
```html
Seastead 3D Design