Sincerely ask for advice, how to take portraits in rainy days, how to polish them, and

Do you want natural light? It is best to change the direction of photography, and it is best to shoot at a 45-degree angle between the light level and the plane position. Second, if you can't change the shooting direction and angle, adjust the camera and adjust the sensitivity to the lowest (in general, in order to get the best picture quality, it is always the highest to the lowest). According to your situation, determine the depth of field and set the appropriate aperture. If you use a camera, it will automatically calculate the appropriate shutter speed. If an M-class camera is used, the appropriate shutter speed depends on the camera's metering bar. In order to reduce the excessive contrast between light and dark, auxiliary light sources can be used, such as turning on the camera flash or outdoor lights, small flash, etc. ~ However, the shutter value should be raised appropriately, and exterior portraits can also use reflectors to make up their faces. There is also a personal suggestion, it is best to use the central key to measure light, measure light into the face, focus on the eyes with a single point in the middle, and the corresponding focusing system is also changed to single servo focusing to ensure good focusing and re-composition. Study the combination of aperture/sensitivity/shutter speed of the three elements of imaging, multi-beat. I believe it won't be long before you can shoot the effect you want at will. In short, there are many ways, as long as you make rational use of all available things to process what you need.