Final answer:
Matisse uses changes in color value to create the illusion of form and depth in his paintings, particularly in foreground elements and shadows. He manipulates light and shadow to shape perceptions of space even when traditional perspectives are skewed.
Step-by-step explanation:
In the context of Matisse's artwork, he has lightened or darkened colors to give the illusion of form and three-dimensionality in several places, including foreground elements, shadows, and sometimes the background to create a certain mood or direct the viewer's attention. The play of light and shadow is an essential technique to create the illusion of depth on a two-dimensional surface. Matisse, like Cézanne, constructs his works in a way that challenges traditional perspectives but still manages to maintain a sense of space and three-dimensionality.
Illusionism in Matisse's paintings often comes from a strategic use of light and value. This technique is highlighted by the contrasting shades that define forms and spaces within the painting. For example, light shining on objects creates shadows that give them volume, and by manipulating the direction and intensity of light and shadow, Matisse can suggest form and space even if the perspective is deliberately skewed.
Ultimately, while Matisse experiments with disrupting traditional illusionism, his use of light and shadow still enables viewers to perceive space and form, evidencing his control over the viewer’s perception through color modulation.