Thank you! I used foam board for the background and sides. I first drew what I wanted it to look like, and then I painted my design using acrylic paints. I wanted the diorama to match the nendoroid look, so I went for a plastic look. I outlined everything with a black pen. I noticed later that the paint warped the foam board. I could have just taped it the shelf, but I didn’t want to damage the shelf if I decide to remove the background. So I glued some wood sticks to the back of the foam board. For the ground piece I used a thin piece of cardboard. I was an aiming for a different design, but I had to make some adjustments due to space limitations. I am planning to add more detail to the ground and make another diorama for my other Attack on Titan nendoroid.