Similarity: a point, feature [hair curl: PART/curly leaves, curls in triangles: WHOLE], or detail in which two items are alike.
Self-similarity: the property of having a substructure [triangle motiv in dress: PART] analagous or identical to an overall structure [triangle dress: WHOLE].
[definition of similarity and self-similarity by thefreedictionary.com]
[Interpretation of painting by Klimt Gustav, The Tree of Life, Stocklet Frieze, ±1909]
INTEGRATED 4x 