Refrection of the light
It refers to the bounced or reflected light as ambient
light. The light source can be the key light or the fill light
that has a source that can be identified.
Indoors lighting, the source of light reflection of any
surfaces in the room, such as the walls and ceiling can
be used to fill in the side.
If the intensity of the fill light is close to the key, it
creates a little shadow; the shot will be high-key.
If the fill is much less intense than the key, the shadows
will be darker and thus the shot more low-key.
Why it is necessary
Setting the light and shade on the face the
perception of depth in an image. The film image
is two-dimensional so, it requires a depth for
creating a sense of three-dimensionality
requires some work.
The key light and the fill light requires unequal in
intensity to prevent the flat facial