Though reshoots are considered something of a dirty word in the circles of film chatter, they're generally not something which indicate a film is suffering through a troubled production and destined to be bad.
The Marvel Cinematic Universe, for example, bakes reshoot days into the schedules of all their movies, to ensure minor issues discovered during editing can be neatly rectified, while also allowing filmmakers time to make subtle tonal, storytelling, and character adjustments.
There are of course many opposite examples where reshoots have been necessary to correct a larger issue, such as re-shaping a movie following a cataclysmic test screening, or in extreme cases, even replacing an actor at the last minute.
When reshoots are done well, regardless of their motive, you'll never even notice them, because the filmmaker and their crew have put in the effort to ensure the continuity between old and new footage matches as closely as possible.
But sometimes, whether through carelessness or sheer necessity, reshoots are blindingly obvious to anyone with even a superficial knowledge of how a film is made.
This can be hilariously obvious continuity errors between shoots, jarring tonal shifts between competing visions in post-production, or perhaps even actors ageing noticeably before reshoots could take place.
These 10 horror movies, whether good or bad, failed to sufficiently disguise their obvious reshoots...
The Scream franchise has been no stranger to reshoots ever since its inception, and while in the sequels this was generally to combat set leaks, in the case of the original film it was largely a case of performing pickups - that is, completing shots which weren't captured during principal photography.
One of the biggest challenges of the original shoot was that filming began before the producers had secured legal clearance from Fun World to use their now-iconic Ghostface mask, and so Wes Craven had KNB Effects produce their own knock-off with just enough subtle differences to avoid a lawsuit.
The KNB mask was used to film a couple of scenes, including Casey Becker's (Drew Barrymore) iconic opening murder and the death of Principal Himbry (Henry Winkler).
Craven later conducted a round of reshoots to capture close-up inserts of the Fun World mask once permission had been granted for its use, and during Casey's death in particular, it's clear that the mask changes between shots.
The KNB mask has more pronounced "cheekbones" and elongated eyes, a more triangular nose, and a shorter mouth, such that keen-eyed viewers can easily notice which shots were captured during the main shoot and which were filmed during reshoots.