Updated the shader material to make more skin colors based on logic found here: https://toneyalexander.github.io/inclusive-color-space/
It lets me change skin depth, flushing, and warmth independently. It works well for fantasy colors too at more extreme values. I had to make a new texture for this to work. I used only RGB values to map blush, pigment, and eye color respectively.
I also made a bunch of shape keys to modify physical features. Like weight, muscles, and a bunch of different eye, mouth, and jaw shapes (not pictured). Next steps are more variations, and a genetic system. Since a lot of these traits are built with sliders instead of being hard coded I should be able to make countless varieties. My goal is to make no two look exactly the same.