A filler comprising cellulose or lignocellulose fibrils on which light-scattering material particles have been deposited, and a process for the manufacture thereof. The user interface form is selectively and dynamically partitionable to define a plurality of non-overlapping frames, including a first frame and a second frame. So that the rotor sail can be operated in a more environmentally friendly manner, it is provided with a photovoltaic system having solar cells to generate electric energy for the drive having an electric motor. Blade assignment means assigns the at least two blades to the at least two steps. The two opposite outboard ends of the spring-axle leaves can move independently of each other. The method further includes forming the consolidated silicon oxyfluoride glass body into a photomask blank having a planar surface with the orientation of the striae layer parallel to the photomask blank planar surface.