Rotoscoping
a. allows animators to create virtual characters and pose them.
b. creates self-contained, self-sustained explosions, fires, flames, and fireworks used in live performances, film, and other forms of entertainment.
c. creates animation using live footage as guides.
d. is process of layering images together.

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artists need to create a realistic interpretation so that people in general can relate to the artwork. for a common people, an artist's impression gets increased only if he can create something which would look realistic. an abstract is difficult for a common people to understand whereas if a person can draw a girl with simple pencil sketch and if that looks like a real figure then the latter will be praised more than the former.