Kaitlyn Dever turned up to shoot a scene with a spider bite on her arm. Not in Australia, where you might expect it. In Los Angeles. It was noticeable enough that it had to come out in post.
She tells the story in the interview below, including a good exchange about what that kind of fix costs.
Digital makeup is most of what VFX actually does
Ask someone what visual effects are and they will describe a creature or an explosion. A large share of the real shot count on any production is this instead: removing things that should not be there.
- Bruises, bites, spots and rashes that appeared between shooting days
- Tan lines and tattoos that do not belong to the character
- Continuity problems, where a scene shot over two weeks has to look like one afternoon
- Rigging, safety wires, crew reflections and stray equipment
None of it goes in a showreel. All of it has to be done.
Why it is not as easy as retouching a photo
A photograph is one frame. A scene is thousands, and the fix has to hold across every one of them while the skin moves, the light changes and the camera drifts.
Paint one frame by hand and it will pop the moment it plays. The patch has to be tracked to the surface underneath it, which is why planar tracking tools like Mocha Pro are the standard answer for this work. You track the region, apply the fix once, and let it follow the movement.
Skin makes it harder. It stretches, it catches light differently as it moves, and grain has to match or the repaired area reads as a smudge.
The AI question
This is exactly the category of work that machine learning tools are getting good at. Object removal with temporal consistency is a well-defined problem, and it is the kind of repetitive task that does not benefit much from human judgement.
That cuts both ways. Cheaper cleanup means more of it gets approved. It also means fewer junior compositing hours, and cleanup has traditionally been how people learn the craft before moving on to harder shots.
We compared what the current generation of tools can actually do in our AI filmmaking and VFX tools comparison.
Worth remembering next time a show looks like it has no effects in it. It almost certainly has hundreds.
