The movie was shot during week-ends, due to conflictual schedule of the actors, all working on a different project at that time.
By the middle of the shooting, the main set (a disused factory) was demolished. This totally changed the story and it then evolved as new locations were found.
The film was first set to be a 15 min short.
The whole movie was shot in natural light. Most of the scenes were shot in less than 2 hours, mostly due to the winter light decreasing very fast.
All the sounds and voices were re-recorded.