sentences:  For intermediate cases formula_235 the COS model corresponds closely to the Maugis-Dugdale solution for formula_236.Even in the presence of perfectly smooth surfaces, geometry can come into play in form of the macroscopic shape of the contacting region.When a rigid punch with flat but oddy shaped face is carefully pulled off his soft counterpart, its detachment occurs not instantaneously but detachment fronts start at pointed corners and travel inwards, until the final configuration is reached which for macroscopically isotropic shapes is almost circular.