ABSTRACT
When a VFX element is added to the footage, it needs to be placed at the proper distance from the lens. For example, adding a sign to a storefront at the opposite side of a busy street means that all the people and cars that pass in front of the sign need to be separated and then put back on top of the newly added sign. This is a constant challenge because, as discussed in the previous chapter, the footage itself is two-dimensional and there is no way to separate objects within it based on their distance from the camera. In most cases, and especially when rotoing people, animals, and other organic forms, the complex movement and ever-changing silhouette means that the roto points need to be animated frame by frame, and the more complex the shape is, the more points will be needed to precisely articulate it.
