A very well known technique artists to help make compositions more interesting using a simple techniques of lost and found lines (or edges). These leaves room for interpretation of the the image or more particularly the form of the subject.
This very simple black and white image on a japaneese stamp that show gingko leaves, but none of the leaf edges actually join to the stems but the image can be clearly interpreted as three independent leaves. Our subconscious vision processing has happily seeks where hidden lines or non obvious edges are likely to be and presents us with an easily understood image. The artistic hook here is the brain has become more interested in the image.
An experiment with lost and found lines in a photo