👉 Sheening is a process in which light or other forms of energy are transmitted through a surface and then reflected back to an observer. This can be achieved through various materials, including glass, metal, wood, and cloth, by shining a beam of light from one point onto another. The term "sheen" comes from the Italian word "senna," which means "snow." In this context, sheening refers to the phenomenon where light or other forms of energy are transmitted through a surface and