The depth we can see into a painting is first created by the artist and then embellished by the viewer. The artist uses perspective, the sizes of objects, and shadows to bring three dimensions from two. In this painting the location of the reeds entering the ground defines the ground plane so reflecting light in this plane brings the depth alive. Painting requires deep concentration. How the artist answers these questions is a gauge of his talents. My solution to show depth is three fold: use perspective, show parts in three dimension, and tell you about it through artlitism, oh and also add a bug.
Robert R. Gaunt