So, fun fact. Interiors in Daggerfall are always the same size as the exterior (excluding dungeons and castles). And in Daggerfall Unity when entering a interior, it loads that interior at the exact location as its exterior counterpart part was. So, if let's say, you don't unload the exterior when entering (for example) a tavern and replace the texture for windows to be see through, you get a little something like this.

- Windows.png (1.68 MiB) Viewed 236 times
Looks like a nice day outside

Now the above is a bit of a quick hack but I been thinking about it for a while and it seems quite possible to do. So if anyone likes the concept and make something of it, I would be the first to download it.
cheers!