Miniatures
Some of my structures are handmade from scratch by me and others I've picked up cheaply second-hand.
For my own creations, I usually use scrap wood from the B&Q off-cuts bin, and my favourite texturing agent, wall filler/wood putty, which I use to make a wide range of surface types.
My room boxes and scenes are usually made for model horse shows, but some were created as photo backdrops for use at home.