הגיגים והגיונות בדבר אומנות

Naturalsim -> Cubism/Expressionism?

Plato theory of forms, for example, had to destroy in a way Naturalism, no? how can I, take a particular, specific object, not an essence, not a form, not THE chair, but A chair, and paint it. So, am I doing a double homocide here, did i mistaken first by taking a particular, and then transforming it again, by drawing, painting, illustrating the object as best as I can. So peculiar.

A Naturalistic painting, trying to showcase the world accurately, depicting the sights:

Ducks, Ewoud de Groot

This stand against cubism, like picasso's guernica (1937):