>>9536211I don't have any very good advice on that end. The room used in most of these recent shots with the silver patterning is actually a roombox where most of the details are just painted/printed onto the walls and floor.
While I do own a couple dollhouses, a majority of my shots are just done with a fortnite mega builder wall snapped together as a backdrop. I have a pile of various scrapbook papers that serve as wallpaper/backgrounds that I can just clip onto the backdrop. That setup works great for close and intimate shots, but I start feeling the limitations of it when trying to make the illusion of a full room. The floors in those shots is just a faux wood bookshelf plank laid on a table. I also have some fabric patterns sold as smallish rectangle sheets I got from Hobby Lobby to give the illusion of a carpeted floor. That whole setup I enjoy for it's versatility but, now owning a roombox I can appreciate how the extra sidewalls allow for ambient light reflection like a real room, and just for being able to confidently putty on pictures and ornaments onto the walls without fear of them falling easily.
If you decide to go with the plywood method then you can look up many tutorials in making room-boxes in the classic dollhouse tradition. There's plenty of supplies to make things to that direction, and you can even go as far as electrifying your roombox even.
Using any foam or posterboard will be easier on the wallet and I've seen folks making their diorama pieces very modular and versatile by planning those builds carefully.
Again, I don't do any customization work but if I decided to start now trying what you aim for from scratch I'd be looking up the same various diy tutorials on youtube, but I think it would be worth not discounting methods used in the dollhouse tradition since your most professional looking rooms will oft come from that method.
