The model only works on the rendered image and motion vectors. Other than the image it has no information about the lighting in the scene, weather or anything else. So in the current form it really doesn’t have much to do with realism.
It would be similar to how you do it in Unity. Godot has similar networking to UNET that existed back then. The docs are pretty easy to understand.
Nah it’s just that they have blocks of the same size. It probably synchronizes terrain using analogous block types where possible, and player position. Basically it has to convert everything into something similar.
Huh maybe it’s cultural but I have totally encountered this with older people. Any time there is a ticket or info booth like at a train station, they are either staring or doing something else and I never know if I’m interrupting something. It’s the best when they fiddle with something looking very busy, and then they look at me annoyed that I’m not saying what I want from them.