Why does The Red Studio appear flat despite showing an interior room?

The Red Studio (1911) appears flat because Henri Matisse intentionally rejected traditional academic rules for perspective and foreshortening in favor of a new pictorial space defined by color and pattern.123

In this work, the studio interior is engulfed in a single, dominant red hue, which causes the objects within the room to function primarily as patterns on the canvas surface rather than as three-dimensional forms. While the inclusion of a window and the specific angles of the table and chair provide subtle cues that suggest spatial recession, these elements are overwhelmed by the surrounding red paint, causing the composition to flatten out.14

Matisse’s approach prioritized the act of painting itself over realistic representation. By using large, thin, and luminous patches of color and eliminating shadows, he warped the depicted space to parallel the plane of the canvas. Consequently, the furniture is merely suggested, and the objects exist as individual artifacts connected by color, creating a sophisticated balance between abstraction and the figurative representation of his studio.142