About photography: main light, side light and backlight

The main light is the main light source of the photo, and the side light shines from the side of the photographer, camera and subject. Backlight shines behind the subject on that line, that is, the photographer can directly see the position of the light source from the camera (but not necessarily, because it may be blocked by the subject). ) Take photos with the main light, side light and backlight, because the main light is light type, and the side light and backlight are light levels. So it can be dominated by side light or backlight. Let's talk about the side light as the main light. Sorry, I'm not at home now, and there are no photos to upload. ) When taking a portrait, first illuminate the subject from the side with a lamp, and then illuminate the hair of the subject from the backlight position with a reflector or a small flashlight. That's it. If the backlight is the main light, don't say it, hehe.