What are the light levels in photographic light and what are their characteristics?

Let's talk about it from our own experience. \ r \ nI I know the light levels of photographic light, which are roughly smooth light, side light, backlight, top light, high light and low light. As for the characteristics, it seems a bit perfunctory to understand them all at once through words. . \ r \ All kinds of light levels can be used for portrait photography, but you should choose the light level according to the environment of the subject and your creative intention. There are high position, horizontal position and low position, and a proper high position will leave a shadow between the nose and lips of the subject; Horizontal light has a poor stereoscopic impression in portraits, so I seldom use it. Let's talk about sidelight. In portrait photography, side light is often used, which can make the subject have a vivid outline and enhance the three-dimensional sense. Of course, it also depends on the application of depth of field, which depends on the lens aperture. Side light is divided into front side light, full side light and side backlight. Backlight will produce a strong texture when shooting transparent objects such as petals and leaves. \ r \ Too many theories need to be combined with practice. A more professional answer suggests that the landlord search in the forum of color and shadow, which will benefit a lot.