As a final note on the gloss measurement technique, it must be realized that the distribution of the
diffusely scattered light is not considered. However, this distribution may significantly affect the
appearance of a material. For example, a surface with periodic surface variations may scatter light
in some narrow but non-specular direction, which could have an undesirable appearance when
viewed from particular angles. Therefore, a more thorough characterization of the light scattered
from a surface would involve the measurement of the angular dependence of the diffusely scattered
light in addition to the determination of the intensity of the specularly reflected beam.