What are the common ways to use light in portrait photography?

From the color temperature point of view, warm colors and cool colors show gorgeous and decadent. From the hardness point of view, hard light and warm light emphasize the structural expression of characters, while soft light shows the delicate skin of characters. From the perspective, the front, half side, bottom light and backlight, the front photo is the general photo of life, and the half side is used to highlight the performance of the structural bottom light, highlighting the sense of paranormal and terror. Backlight is mostly used for creation, which can capture the beautiful outline of characters. It's better to find it yourself if you study more. Thank you for your adoption.