Applied aesthetics is the application of the branch of philosophy of aesthetics to cultural constructs. Applied aesthetics is the application of the branch of philosophy of aesthetics to cultural constructs. Although structural integrity, cost, the nature of building materials, and the functional utility of the building contribute heavily to the design process, architects can still apply aesthetic considerations to buildings and related architectural structures. Common aesthetic design principles include ornamentation, edge delineation, texture, flow, solemnity, symmetry, color, granularity, the interaction of sunlight and shadows, transcendence, and harmony. These aesthetic considerations form one branch of the philosophy of architecture. Interior designers, being less constrained by structural concerns, have a wider variety of applications to appeal to aesthetics. They may employ color, color harmony, wallpaper, ornamentation, furnishings, fabrics, textures, lighting, various floor treatments, as well as adhere to aesthetic concepts such as feng shui. A new art form struggling for acceptance is digital art, a by-product of computer programming that raises new questions about what truly constitutes art. Although paralleling many of the aesthetics in traditional media, digital art can additionally draw upon the aesthetic qualities of cross-media tactile relationships; interactivity; autonomous generativity; complexity and interdependence of relationships; suspense; and playfulness.