First Mexican stop-motion feature ever produced.
Many of the characters are inspired by the work of surrealism painters Remedios Varo and Leonora Carrington
Procustus' name is a reference to the Procrustean Method, which means conformity through ruthless actions.
The white streak in Frankelda's hair pays homage to the Bride of Frankenstein. Her black and white striped stockings are also a reference to Tim Burton's filmography.
When the Ambriz brothers reached out to Guillermo del Toro, one of their childhood inspirations, they did not expect him to be inspired by their project and to support them through it. Guillermo del Toro dubbed himself the Godfather of the movie production and put money into the project as well as offering them critique and advice. "[Guillermo del Toro] helped us tremendously. He also supported us in finding distribution for the film in Mexico, and later helped us connect with Netflix. In many ways, he has been the film's biggest champion. Beyond the practical help, we learned something even more important from him: that the most important thing a filmmaker can be is a good human being. Films are ultimately about connecting with people and helping people."
