The Neon Demon is one of my favourite films of recent years. I wrote up my thoughts on it a while back. Here are some of my favourite posters that I’ve found, created by other fans of the film.
Neon Demon pink and purple poster 
Neon Demon poster 2 by Glitchway 
Neon Demon poster by Glitchway 
Neon Demon poster by Luke Andrew Sattler