[mixedbit]

It is not static, the light source moves, it is the same as if the models would move. They explain that they update light probes, they could do the same if the models would move.

I think the limitation here is the number of lights. They use shadowmaps for direct shadows. You can update shadowmaps interactively for a couple of light sources, but if you have dozens of lights, as is often the case with architectural scenes, shadow maps updating can become a bottleneck.

[mrmaxm]

We have precalculated all probes and lightmaps (25) in advance due to defined light trajectory. This clever hacks, tricks the user into believing it is a real deal - that was a desired goal of demo. Doing true GI in WebGL wont be commercially viable option, yet.