Ask a professional photographer to shoot portraits and polish them.

It is suggested to use the simplest portrait lighting layout, a lamp with a soft box (reflective umbrella can increase the lighting area, but the soft light effect is not as good as that of the soft box, and we sometimes hope that the lighting area is not too large), and shine obliquely from the front of the figure at 4: 30 or 7: 30 (depending on where you want the dark area), and then capture the excess light from the lamp below the figure on the other side, and set up a seat with a reflector to reflect the light.

In fact, you mentioned that it is possible to use another flash instead of a reflector. As long as the light ratio is well controlled, the other one is at least one aperture lower than the image brightness of the main light source on the face of the person. Generally, a soft light source and another hard light source are used to match. The position can be illuminated by another one on the side of the character at 9 o'clock, and the specific position can be fine-tuned. Don't let the hair of the character block the auxiliary light source. The key is the light ratio. If the output light ratio of two light sources is the same, there will be a lack of stereoscopic impression.