The main light casts the shadows and the fill light brightens the shadows.

Create a portrait for each of the five main lighting styles with a main light and a fill light. The fill light can be a reflector or a wall as illustrated in the video on today’s Topic page. Shoot each on first with just the main light and then add the fill for a second shot. For each of the five lighting styles, post an example with and without fill. Write a short text about how you set up your fill and how it changes the photos. 10 photos total.

Those lighting styles are: Rembrandt, broad light, short light, butterfly, and split Light.

https://openlab.citytech.cuny.edu/comd3330ol98fall2020/2020/11/17/week-11-one-light-portrait-photography/