How and what techniques did claude monet use to compose the haystacks paintings?

Monet created this impressionist series of haystacks using oil paint. The series became famous for his return to the same subject at different times and seasons to show how lighting and atmosphere would effect the same scene. He began the first of 25 paitings in the summer of 1890 and ended in the spring.
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The linear perspective changed the quality of art because it gave art a sense of reality. it gave the illusion that the background and surroundings were actually close and/or far and a sense of depth. linear perspective change the quality of art following its birth the renaissance period as they want the art to be more realistic and they believe one way to achieve it is to use the method of linear perspective. it uses the principle of math to realistically portray space and depth in art.