What are the conditions for a crate to be a tardis crate? It needs to be partially inside a wall?
Yeah, or close enough at least.
Does there need to be another ground above the position where you clip into the wall?
Because that is also the case in Greece
Yeah, the crate itself is a ground + the one above the crate needs to be another ground. Then, you go from the ground above (some ground) to the ground below (crate). Now you are "in between" the ground above & on the crate ground. I believe this to be crucial (the in between state) for a tardis to teleport, as grounds that are tall don't teleport.
The crate is actually a DynamicGround, and I believe this part is very important as well
Have you gotten to this part yet in your project?
I'll check it out tomorrow afternoon, I think
Yes, but a dynamic ground is a ground.
Essentially, a tardis is possible, because the dynamic ground is dynamic; its content is generated based on the node. So, when you break a crate in a tardis position, you're waiting for the dynamic ground to change its content (which happens in the crate hook code) [and this is some other crate within view distance].
The reason you need to be stuck in a ground wall is for the game to consider the trio to be below it - and it thinks it's actually a ceiling: and the ceiling code uses the PREVIOUS ground (which was the crate) and puts you on it.
Otherwise the game would consider the player above ground, and it would never use the crate ground again.
Thoughts on camera position? It might be difficult to see all the details further away on a small youtube thumbnail
It should be "Final Rome" now

With the previous thumbnail you could see the Romans, who do indicate that Beta Rome is now playable.
But not sure if it is possible to show some Romans in Sector 1 thumbnail?
But maybe having a subtitle "Done", "Completed" could be enough.
You could zoom background a lil, or make a little different ss
@pegperegogaucho will you be able to document tge whole journey on the wiki as well when you have time?
I believe such thing would be really good to write down.
The journey is all on this server :)