What does stereoscopic lighting look like for portrait photography, and how to create such lighting?

If it is low-key and the background is black, use yin and yang lights, and use yang auxiliary lights, yin auxiliary lights, and outline lights.

If it is high-profile, the background is white, flat light, background light and an auxiliary light are required.

If the mid-tone is a blue or gray background, you need to use a triangle light, a background light (without metering) and an auxiliary light.