LOL - I'm using the same wallpaper on my RMG diorama on my second floor

Looks good. I would offer this - add a dark wash to the baseboard molding. It looks to much like the floor joists and on the first floor it doesn't match the window trim.
I know this is a work in progress, so take this with a grain of salt - add washes to the edges of the broken parts. They look to clean right now in these photos.
I saw your dio. this morning and now to see this - wow what a day! You made Great progress.