Brunette Girl Posing In The Sand

Paint: Mixing sand with paint produces a textured finish for walls and ceilings or non-slip floor surfaces.
Railroads: Train operators use sand to improve the traction of wheels on the rails.
Roads: Sand improves traction (and thus traffic safety) in icy or snowy conditions.
Sand animation: Performance artists draw images in sand. Makers of animated films use the same term to describe their use of sand on frontlit or backlit glass.