The scenes run right here in the page, in your browser, with WebGPU (Chrome, Edge or Safari 26+). Pick a scene below; they are ordered from the heaviest to the lightest, and the real scans are a recording (2 GB is too much to download from a page). Only the selected one runs, and it pauses when you scroll away. Drag to orbit, right-drag to pan and scroll to zoom. The left panel shows what the GPU is doing; the settings panel on the right holds the levers: detail threshold, budget and debug views (try view: meshlets).
The first time a scene loads, its cluster hierarchies are built in the browser (up to about 35 s for the ruins). Later visits load them from the browser cache in a few seconds. Getting started shows how to do the same with your own models in a few lines.