Masking over movement in After Effects is a technique used to isolate a moving object from its background, allowing for precise adjustments and effects to be applied. It involves creating a mask that follows the object’s movement, effectively cutting it out from the rest of the footage.
This technique is particularly useful for creating complex visual effects, such as compositing multiple elements together, removing unwanted objects, or isolating specific parts of a scene. It enables greater control over the object’s appearance and interaction with other elements, enhancing the overall quality and realism of the final composition.