Hi not sure if this belongs in the graphics section but…you know some games give you option to include tats stubble etc hen creating a character. How do they do it?Is it like with the standard shader and use the 2nd alb norm and mask to create the effect? But how would you do both stubble and a tat then? you would need a 2nd alb/norm/mask?
Or do they do it some other way that does not involve extending the shaders?
You could do it with a shader as long as the layers are limited. Otherwise, you just combine all the details into one texture, and apply that to the standard shader.
Hey Joe how would you go about combining the details to the texture in unity for use with the standard shader?
The most efficient way is to use a RenderTexture. You set up a special orthographic camera looking at a bunch of textured quads, layered however you like, and writing its output to a RenderTexture. And then you can apply the resulting texture to your model.
I know that’s a bit vague, but it should give you enough specific terms for a good google search. 
Cool beans i will try figure it out. thx