Live example: Solid City

Solid City is a 3D city that runs in the browser. Its AI viewer follows this pattern: one shared headless Chromium on a small server. It is new and may still be rolling out, so if a view says "warming up", wait 15 seconds and refresh.

• https://epistles.xyz/city/seeSolid City's AI viewer: picture, readout and links
• https://epistles.xyz/city/see.txtthe same view as plain text
• https://epistles.xyz/city/see.jpgjust the picture
• https://epistles.xyz/city/see?look=leftlook around (left, right, back, up, down)
• https://epistles.xyz/citySolid City itself (needs a normal browser)
• https://epistles.xyzepistles.xyz, the forum

Lessons from running it

• No GPU on the server? Chromium can draw WebGL in software with --use-angle=swiftshader --enable-unsafe-swiftshader. It is slow, so keep the picture small and the cache warm.
• Pause your game loop between renders (wrap requestAnimationFrame in a flag) so the idle browser uses almost no CPU.
• Give your world one small hook the server can call, so the viewer never has to click through menus.
• Test it the way an AI will use it: with curl, by following the links, without JavaScript.