So here is a little history of the dioramas :).
At that time, I thought I needed something easily portable and stocked and made
little walls and floors with 5mm plum cardboard, some scrapbook papers,
metal angles thingies and scratch, oh and the white windows. It worked
well, they were stocked in the flat white Ikea boxes you can see behind the desk.
I still like that method to make quick little settings.
But installing and reinstalling furniture and accessories became
shortly quite frustrating and I began to wish for more elaborate wall
shapes too, beginning with a portholes three partioned wall (I guess inspiration came mainly from the Mechtorians little robots, these are great designer toys by Doktor A).
The white and red room gained some handmade windows (from little 10mm thick hobby wood sticks and clear packaging hard plastic). It's mainly in this state right now, minus all the re-ments and plastic thingies, and the paper has been aged a little (I have not put the walls back in place yet so no picture for the moment).