2. Why were the Van Eycks called the "fathers of oil painting"?

The Father of Oil Painting. Jan Van Eyck is the Flemish painter often credited as the first master, or even the inventor of oil painting. His use of oil paints in his detailed panel paintings, typical of the Netherlandish style, resulted in him being known as the father of oil painting. Hope this helps.

Explanation:

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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.