In this context an interesting question may arise, whether some objective, curvature based boundary between impressionism and expressionism in visual art exist? In general, impressionism is earlier movement, related to rather optimistic illustrations of real exteriors oriented to future - whereas the expressionism is more recent movement, connected more to internal, abstract and tragical feeling of the past. Abstract or psychical impressionism is based on intuitive preference of overlapping spots (tachism), where positive curvatures and altitude prevails, while expressionism is more rational art, based on curves and lines with zero or negative curvature and pessimistic connotations (informel). Note that expressionistic art is often generated mechanically or by algoritmic digital techniques. The distance scale between positive curvature of blobs and negative curvature of areas and lines still remains around 1.7 cm, i.e. at range of CMB wavelength scale.
Psychic impressionism of Jeff Lewis, 2001:
Jackson Pollock, Autumn rhythm, 1950:
Such perspective would explain the subliminal value (and objective price) of J. Pollock's abstract oil drip "paintings", which are of fractal nature (albeit their fractal dimension is rather low) and where the spot and lines feature of 2D curvature remains rather balanced in it - so they appear most transformable/transformative from our subconscious view, because they illustrate dual character of Aether foam in its critical Lifshitz point most exactly.