A horror about mythical Welsh fairies had filming relocated to north Yorkshire after crew found out about strict non-smoking rules on sets in Wales.
Does it matter these days, when so much film scenery doesn't exist outside of a hard disc anyway?
The ban made it impossible to make key scenes look authentic, according to Rabbit Trap, external director Bryn Chainey, as the main characters Darcy and Daphne Davenport - played by Dev Patel and Rosy McEwen - are chain smokers.
It's a film, an original script - if the filming in Wales was felt to be so necessary, just write them differently to please the prodnoses, surely?
In England, there is an exemption if someone is required to smoke as part of a role, according to the British Film Commission, external.
Relaxing the rules around film sets in Wales was discussed in detail more than a decade ago in the Senedd, with the BBC warning it could move filming of prestigious dramas over the border, but proposals were dropped after opposition from campaign groups.
Well, that's about the level of decision making we've come to expect from the Labour fiefdom in Wales, after all.
While the Rabbit Trap team had encountered other issues around filming in the country, the director called the smoking ban "the nail in the coffin" for its original plans in Wales.
"It gives the audience a visual hint at the anxiety they're not talking about."
You're hiring these people to act, surely they can convey that some other way?
"The only workaround would have been using CGI (computer-generated imagery) to make the cigarettes appear to burn and produce smoke," Chainey said. "That would have looked fake and was out of our budget."
As he is half-Welsh, the project was inspired by Chainey's desire to connect with his roots, with the film set entirely in a remote cottage. Welsh actor Jade Croot, from Merthyr Tydfil, whose character is bilingual, was cast in a main role. The production team then spent months searching Wales for the ideal location for filming.
And flouncing off to Yorkshire when he came up against the nonsense that has overtaken the land of his roots, rather than change his script.