How else might a landscape artist show shapes in the background to depict their distance from the viewer?

A landscape artist might use atmospheric perspective to show shapes in the background. This technique involves using lighter colors, less detail, and softer edges to depict objects that are further away. The artist might also use size to show the distance of shapes in the background, making them smaller as they move further away. Additionally, the artist might use overlapping shapes to create a sense of depth and distance.