How does Stanley Spencer's drawing look 3D?

Stanley Spencer's drawing appears three-dimensional due to his masterful use of perspective, which creates a convincing sense of depth. He employs overlapping forms and varied line weights to suggest volume and space, while his careful shading adds to the illusion of light and shadow. Additionally, the dynamic composition and the way figures interact with their environment enhance the three-dimensional effect, drawing viewers into the scene. This combination of techniques allows Spencer to create a rich, immersive experience in his artwork.