Greek artists would often paint their sculptures, though the Romans preffered them plain (evidence of this can be found in tombs, though most was destroyed by time and the elements.) The Greeks also gathered inspiration from mythology, athletics and daily life. Romans gathered inspiration from mythology, architecture, and nature. The greeks were best known for their distinctive vases, which were red and black in color. The romans went more for naturalism and illusionistic. <span />
irregular outline is considered "asymmetrical features"; or "a dress with a crooked hemline" characterized by asymmetry in the spatial arrangement or placement of parts or components.
Simply put, leading lines is an image composition technique that features line shapes—like, say, a road or river—to draw the viewer's eye to the intended subject of the photograph. Whenever people look at an image, our eyes are naturally drawn to the lines present within it.