Verified Answer :

Hagrid

The primary benefit to the use of overlays in animation is
that animators are able to enhance their output to perfection. It could also
downgrade their output as to the number of numerous overlays they had applied
to their animation.

taskmasters

Add a dimensionality to
their animations. It gives the visuals more depth and for a more realistic feel.
It provides a richer visualization for the viewers. Overlays are utilized by
animators to enhance each scene with more details that would make the animation
look better.

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