Xukmi.shaders.fx
(usually via the character maker or Studio), select a material (e.g., skin, hair, or clothes), and change the shader to "xukmi/Vanilla Plus" : For the best effect, place a on one side of your character in Studio to create depth. Shadow Adjustments
A more organized, modular version of the vanilla shaders, distributed in .cginc files for easier integration and technical tweaking. xukmi.shaders.fx