Here is the complete HTML code to render the seastead design in a 3D WebGL format. I used **Three.js**, pointing the script to standard unpkg modules so it can be previewed seamlessly in any modern browser.
Save the block below as an `.html` file (for example, `seastead.html`) and open it in a browser. You can click and drag to pan around, scroll to zoom, and right-click to drag the camera position.
```html
Trimaran Seastead Design
Seastead 3D Model
Scroll to zoom, Left Click to rotate, Right Click to pan
```