: A highly specialized feature that allows you to sample the grain from one image and apply it to another. This is vital for professional compositing—for example, if you are placing a digital element into a background plate shot on 35mm film.
Early digital sensors were terrible in low light. The "gain" switch on a camera was a panic button; flipping it on would turn your image into a static snowstorm of dancing pixels. Traditional noise reduction methods in software like After Effects were crude. They relied on simple blurring or averaging of pixels, which destroyed detail. If you wanted to remove the noise from a face, you usually ended up turning the person into a wax mannequin. grain surgery 2