Specularity
Specularity is the property of a surface to reflect light in a restricted, mirror-like direction, producing a specular reflection or highlight. It contrasts with diffuse reflection, where light is scattered in many directions. The presence and sharpness of specular highlights depend on the surface roughness at scales comparable to the wavelength of light and on the angle of incidence.
Optically smooth or polished surfaces display strong specular reflection, while rough or granular textures yield weaker
Mathematically, specularity is described within the Bidirectional Reflectance Distribution Function (BRDF) as a specular term, often
Applications span computer graphics, photography and cinematography, material science, and vision research. Understanding specularity is crucial