https://wccftech.com/cyberpunk-2077-new-mod-considerably-improves-lighting-on-hair/

A new Cyberpunk 2077 mod that has been released online introduces some lighting improvements to the game.

The Better Hair Material improves how hair reacts to lighting, thus improving lighting. Among the changes introduced by the mod are brightness fixes, which introduce better shades for darker hair, like in the case of Johnny's hair.