well, real human skin excists of several layers. there's a thin surface layer that gives the basic skintone, but underneith are more flehsy layers, veins, etc. In real skin, the light partly travels into the skin, and gets scattered around as it passes through the tissue underneith the surface layer. The tissue underneith the outer layer of skin is much more red and pink-ish tather then pale or tan or brown etc.
The scattering makes it so the skin looks soft and organic rather then hard and plastic.

You can see an extreme example of this when you find some dark place like a dark room or such, and shine through your fingers with a flashlight or something similar. Your fingers will light up with a red/orange color. This color is the result of the light from the flashlight traveling through the flesh of your fingers, getting scattered around while doing so.

In professional CG programs, shaders are created specifically to mimic these effects of multiple layers of tissue with their own colors and their own scattering behaviour. However, bryce doesnt have those.

What bryce does have, is a  "transparent color" which can be used to change the color of light as it passes through the object.

Bryce also has blurry refractions or transmissions (i forgot which name bryce uses and dont have it with me right here) which 'blur' the light as it passes through a transparent object. If the light gets blurred enough, it will no longer visually strike you as transparent, because you cant look through it and distinguish anymore whats on the other side. However, the light, while strongly blurred, still moves partly through the object, making it look translucent.

When this light gets blurred and moves throug the transparent object, the transparent color gets applied to the light passing through. As a result of this, the transparent color can thus be used to behave a bit like an 'internal scattering color' (the color the light picks up as it scatters through the flesh).

(_/)
(='.'=)
(")(")This is Bunny. Copy and paste bunny into your signature to help him gain world domination.