Artist makes shapes in the background smaller than the shapes in the foreground to communicate. Their distance from the viewer house made landscape artist show shapes in the background to depict their distance from the viewer.
Show shapes with bright colors
Show shapes that are sharp and clear
Show shapes with lighter colors
Show shapes that are large and bold
Show shapes with less detail or fine lines
Use overlapping shapes to create depth
Utilize atmospheric perspective by fading colors and blurring shapes in the background
Focus on creating a sense of depth through the use of scale and placement of objects in the composition