How to realize butterfly lighting?

Butterfly light and Rembrandt light are both portrait lighting terms introduced into China from abroad. The basic arrangement of the butterfly lamp is to emit light at 45 above the front of the figure. If the light is not set with astigmatism, it will form an obvious nose shadow between the tip of the nose and the upper lip of the person. The basic arrangement of Rembrandt lighting is to illuminate 45 degrees upward and sideways in front of the characters. If the light is not set with astigmatism, a triangular spot will be formed on the cheekbones of the backlit characters. The above lights are typical lights in the popular era of black-and-white movies. In order to create a three-dimensional effect of black, white and gray, it is basically a single lamp arrangement. In practical application, the light distribution mode can be evolved as needed, such as adding an auxiliary lamp to reduce the strong contrast, which can get good results. Modern photography is dominated by color, and the three-dimensional modeling of characters is dominated by color distribution. Few people directly use pure butterfly light and Rembrandt light, at least not using a single lamp to create real original butterfly light and Rembrandt light. The above lighting is mainly suitable for westerners with high cheekbones, high nose and low eye sockets, but not for oriental faces. The experience of others can only be used for reference, not directly copied. I hope you enjoy your creation and make progress every day.