Diffusion: in regards to photography, this is the softening of light as it pertains to the quality of it. There is hard light which is often much less diffused while soft light is very diffused. Diffusion can break things known as specular highlights--which are little bits of light and details that come out due to the illumination found with light.
Flash duration and a number of other things also play a role. But with diffusion, light's super powers can be nullified. . thephoblographer.com
2019-1-29 14:00