I don't know how common it was but it certainly has been a thing in the past for directors to "distress" or otherwise interfere with unexposed film in order to "bake in" a special effect. I remember the commentary track for Pitch Black talked about taking a gamble on some kind of chemical bath that didn't work out the way they hoped.
It would all be done in AfterEffects now, of course, at very little cost compared to working with film. That's what makes the opening joke about VFX coming extra funny to me - anyone with a Creative Cloud subscription, ie. every living filmmaker, should be able to create that effect with stock materials and filters. Not a movie quality result but no worse than the rest of this turd of a film.