Impressionist paintings were unpopular at first mainly because they were so different from the paintings people were used to seeing. Traditional paintings often depicted people and scenes that were familiar to everyone. They included subjects from myth and legend, famous historical events, or biblical stories. Artists usually worked in their studios and made many preliminary drawings before producing a finished painting.
Impressionists, in contrast, chose to paint ordinary people and everyday scenes. To them, the subject of a painting was not as important as the portrayal of light and color. For this reason, they preferred to work outdoors, painting quickly to capture rapidly changing qualities of light and atmosphere. Shapes were no longer carefully modeled and clearly outlined. Instead, they were painted as masses of vibrating color. Even shadows, usually painted gray or black, were tinged with color. Using what is called a "broken-color" technique, impressionist painters applied pure color to the canvas in many small brushstrokes. When viewed from a slight distance, the strokes of color seemed to merge, forming a complete image.
Each of the French impressionists used these techniques in different ways. Monet was especially interested in the effects of changing light on color and form. He frequently painted the same scene at different times of day. The changes in light and atmosphere caused the subject to look different in each painting.
Renoir portrayed the effects of flickering light by painting softened forms that appeared slightly out of focus. Manet did not use the bright colors of the impressionists. But his preference for everyday subjects greatly influenced the younger artists. Degas, too, painted informal subjects, such as women bathing and dancers stretching. Unlike other impressionists, he painted indoors and used outlines to define the shapes of his figures.
Impressionism was considered to be a revolutionary art movement. But earlier artists had experimented with similar techniques. The English painters John Constable and J. M. W. Turner skillfully portrayed light and atmosphere. The Spanish painters Diego Velázquez and Francisco Goya used color and brushwork to create the appearance of movement. The French artist Eugène Delacroix had observed that shadows contain elements of color. The work of all these artists influenced the impressionists. So did the forms and composition of Japanese woodblock prints.