Who can help me introduce some lighting methods about portrait photography?

According to the different positions of light sources, it can be divided into front light, (left and right) front side light, front side light, (left and right) rear side light, backlight, upright top light, (front and rear) oblique top light, (left and right) side top light, foot light and so on.

According to the principle of light source, it can be divided into convergent light and scattered light.

According to the different color temperatures of light sources, they can be divided into high color temperature lamps and low color temperature lamps ... and lamps of other colors.

The closer the light is to the plane, the flatter the effect will be, which will make the uneven surface look flat. The closer you get to the side light, the more you can show the texture and ups and downs. The closer to the backlight, the more contours and lines can be displayed ... these are general rules.

For example, the man you want to shoot is fat, but you want him to look thinner. In addition to makeup modeling, what you generally need to do is: relatively convergent (right) backlight, divergent (left) front light, convergent rear oblique top light, and convergent eyes (or large-area diffusion). In order, their light ratio is (film) 4: 1: 7: 6 (or large area astigmatism is not counted); Use 20 tablets to darken the forehead (above the eyes), make the eyes shine clearly, and make men show a tough temperament. ...

This is just a general theory, and the details need to be adjusted on the spot, such as low nose and taking care of the background. The lighting is very flexible. According to different scenes, atmospheres, landscapes, people, psychology, modeling, materials and textures, every photographer will have his own lighting and lighting methods, so you should inquire more in practice.