The purpose of three-point lighting is to position three lights to use for visual media. When using three-point lighting, it is important to eliminate the shading and shadows that are produced by direct lighting.
This first image shows the overall setup of three-point lighting. When doing three-point lighting you must have a key light, a fill light, and a backlight. Below I will describe each light and its purpose.
This image is a close-up of my classmate with no lights. I think this image is important so we can see the differences that the key light, fill light, and backlights make.
In this image, the key light is the only light used. The key light is the dominant light source and it can be compared to the sun because it provides the distinctive highlights in the scene.
Next, we used the key light and the fill light. The fill light is known as the secondary light source. It creates depth and dimension in the subject's face. The fill light produces illumination about half as intense as the key light.
This last image is the setup with all the lights and the subject sitting in the right place. Overall in Mr. Harwood class at SCSU, I learned that three-point lighting is very effective when trying to create good visual media.