Steps: 
Print the model facing the flat side down (See image)

Print the backdrop image in 200mm(w) x 80mm(h) and cut it (you can use an inkjet printer and A4 paper)

Apply glue stick to the back of the printed model, make sure to apply in all segments

Place the backdrop on the 3d printed model and press to fix it in all the segments where glue was applied

(Optional) Place a couple of tea lights on the back of the model for an enchanting movie night

Wallpaper I used: [https://wall.alphacoders.com/big.php?i=909185](https://wall.alphacoders.com/big.php?i=909185)

You can find the cropped image attached in the other files section