i've really started to get away from black and white shading and highlights (still do a bit :/ old habbits, but compared to before: i've changed) and this just helps me even more with choosing the right tones, and placing. thanks a lot! (hopefully i'll notice some improvement)
If i've already drawn something and I want to add or enhance the undertone I lay it over on low opacity. If I'm just starting something, I put the undertone down first on full opacity, then I layer the base tone, hi-lights, and lowlights on top of it in low opacity so the undertone bleeds through. Undertones usually affect the all skin, in light or shadow, so I tend to incorporate it everywhere so that the piece looks more unified, however it should be most visible in the mid tones/ transition areas.
Thank you so much for this! it's really a great understanding of it and you bring much knoweldge to it. A lot of people forget it, me too. lol That's why I like drawing from the darkest tones first than drawing on top of it with the intended skin tone 8D