In deliverance, which technique does steve dibenedetto use to create a sense of space?

The technique which the artist uses to create a sense of space is the use of overlapping images and shadows. This painting is characterized by a dynamic impression of continuous movement. By incorporating shadows in the painting, the artist creates the illusion that there is space between the objects. Also, through the use of overlapping objects, we perceive one object as being closer than another. 

The term is called adduction