depiction

The impressionists were concerned more with the effects of light on an object than with exact depiction of form, because they believed that light tends to diffuse the outlines of the form and reflect the colors of surrounding objects into the shadows.

Post-Impressionism is a predominantly French art movement that developed roughly between 1886 and 1905. It emerged as a reaction against Impressionists' concern for the naturalistic depiction of light and colour.