Large Poster for little money

This poster serves as a backdrop for a lighted starry sky.
Many posters in size (210cm x 140cm) are much more expensive, I got here for relatively cheap money a decent quality.
Be careful: When decorating the material expands very strong and takes place after drying together again, so always paper overlap, otherwise there are gaps. Next time I'll use a spray adhesive, which allows detachment, then an optimal correct is ensured.