That's just a Matcap shader. At its simplest form, (which most of the ZBrush materials are), it's basically just sampling a reflection texture based on view-space normal of the surface. The image you see on the left for the material in ZBrush is the reflection texture being sampled. There's some free ones here that you could plug other matcap textures into: https://assetstore.unity.com/packages/vfx/shaders/free-matcap-shaders-8221
Wow Thanks, I Used Reflective Light And Stuff Ill Look Into This, Shaders Will Take Too Long lol (since i have yet to delve into that), Thanks!