https://profoto.com/int/academy/courses/light-shaping/distance-direction-shape-basic-foundations-of-light
Perfect for the aspiring photographer, this course will help you to start working with light. David looks at the basic theory and physics of how to control your light, while award-winning portrait photographer Hannah Couzens translates this into something that you can use in everyday practical photography. Together they’ll show you how to create natural beautiful images using the three cornerstones of light: distance, direction and shape. Control brightness and light fall-off with distance – by moving light source closer or further away. Place your light to determine where and how shadows fall on your subject. And create soft or hard light using different light source shapes and sizes.