Three-point lighting method in simple lighting teaching

First, give an idea. In photography, light can be divided into ambient light and figure light. The three-point illumination method is basically aimed at the character light of the character. Three-point lighting mainly includes "main light: key light", "fill light" and "backlight: backlight". First of all, we need a completely dark environment and a role. The main light refers to the main light source, which we call the key light. Basically, when the camera or video camera is in front of a person, the key light usually falls at the position of 15-45 degrees on the right front or the upper left front of the person. The position can be left or right, but the angle of the main light is usually about 15-45 degrees higher than the head of the character. When there is only one main light source, the dark side of a character's face will produce a strong dark side. I think everyone can basically understand this, but it is usually not advisable to have such a dark side on a person's face without special requirements for plane photography. When the dark side is produced, we need to fill the light. Supplementary light is auxiliary light, which we call supplementary light. When the main light is at the angle of 15-45 degrees in the upper left corner of the figure, the auxiliary light is usually at the angle of 15-45 degrees in the lower right corner of the figure. Basically in the opposite position to the main light. If the main light is on the upper left, the auxiliary light is on the lower right. Or vice versa, Dallas to the auditorium is basically head-centered. Up 15-45 degrees, down 15-45 degrees. The dark side of the main light on the characters can basically be eliminated by supplementary light. Of course, the three-point lighting will not only have the main light and the auxiliary light. In fact, if you want to shoot the villain, this is actually enough. Backlight is mainly used to separate people from the background when shooting real scenes. Backlight, as the name implies, the light is behind the figure, which we call backlight. Usually located directly behind the graph, 15- is 45 degrees higher than the head. Basically the backlight is higher than the head. Isn't there a lamp that can only shine on one side? This kind of 360-degree light lamp can't really highlight the significance of backlight (because the significance of backlight is to separate the characters from the background by typing their outlines, but light can't even be separated from the background). When the normal backlight is only in one direction, the outline and background of a person will have obvious dark light and will not be exposed. But because there is only this 360-degree omni-directional light ... there is no way, so even the bookcase is illuminated ... the meaning of backlight is ... hmm. The above is a simple three-point polishing teaching. Of course, the lighting is not just like this, and the types of mode two lights are just like this, so I won't go into details, but next time I should be able to mention two lighting methods: high-key lights and low-key lights. (Excerpt from: Lighting Rental Exchange Station)

References: 1 Jane Liren 2000 Stage lighting design combined with the development and use of computer software 2 Huang Zhongyu 2002 Study on color calibration of color images under different light 3 Talking about the epoch-making high-definition photographic lighting equipment technology.