The painting style is gloomy and muddy, especially good at depicting the character of trees and the depth of forest swamps. & lt forest exit > and< oak tree in the sun > draw twisted and scarred 6L branches and cover the sky with dense leaves; The image of an old cadre struck by lightning is breathtaking. & lt Oak Forest depicts the grass in the sun and the cows in the shade of trees eating grass and drinking water, which is full of fun and beautiful. His exploration of air sense and light, as well as his study of the atmosphere changes of the same scene in different periods, opened the way for the emergence of Impressionism.