By contrast, the blanket illumination of complex structures presents the object as a whole and reduces the three-dimensional effect. By decreasing contrast of light and shadow on the object, the effect is nowhere near as stimulating as when directed accent lighting is used. It also means that the variations in the shape will not be so easy for the observer to see. Producing this uniform lighting requires some unconventional luminaire positions, such as from the side or on the floor with wide beam angles, in order to avoid these being shadows on the underside. This does mean that the observers themselves will cast shadows on the object when standing in front of it and they are likely to be dazzled by the light.