I have a few suggestions:

- as I mentioned above, the shadow map is drawn twice, probably it's being auto updated by three.js at some point

- the entire cabin has a lot of triangles while the player only sees a small portion of it

- cabin lighting could be baked

- a lot of triangles seem to be rendered without backface culling, that's probably not intentional

- don't run GTAO at full resolution, try half

And also, use the spector.js [1] browser extension to profile the app and have your AI agent analyze the capture.

[1]: https://spector.babylonjs.com/