Breakdown:
Floor = MDF covered with shiny black shelf paper.
Walls = Wood frame covered with MDF then thick (3mm) art board for the decorative bits.
Door = Same as walls
Arch = Same as walls and the curved corners are PVC pipe. A thin clear plastic sheet covering the holes on the inside of each panel and a foam core light box in behind that to prevent light bleeding out.
Ceiling = Same as arch with 1/8" clear acrylic used for rigidity on the lights
Floor, side walls, arch and door are all separate modular pieces. All pressure fit.