Abstract
Building walls are finished in various ways. The surface of building wall seems to be a crucial factor to determine the impression of the building. This paper will clarify the evaluate process of the visual impression of the sprayed finishing. Bumpy finishing feels pleasant and bright colored finishing feels natural. These impressions are quantitatively evaluated by 1/f^n fluctuation modulus (=n) and lightness (=L^*) that are properties of sprayed finishing. If L^* ≧ 60 and n ≧ 2.1, sprayed surface feels pleasant and natural.