But two questions: How does yellow light and red blood under surface cause green tones? That doesn't make sense in color theory. And to be honest, in your example the greenish parts remind me of healing bruises
The second thing is: "White skin absorbs the light while dark skin reflects it" This doesn't make sense from a physical point of view. Optics teached us that light surfaces reflect the light, that's why they appear white in our eyes - they reflect every wavelength of light, and all wavelengths together make white. Dark colors absorb the light, that's why they appear dark to our eyes. When all the wavelengths of the light from a lightsource get absorbed so there is no light left to get reflected into our eyes, then the surface looks black.
Those are the points I don't agree with or don't understand. But maybe you have a reason to say that? Explain please
You're right about the yellow and red, doesn't make sense.
About the white and dark skin, white skin absorbs more in a sense that it's not shiny, it doesn't make much highlight while dark skin shows more highlights, hence reflects more. More about the texture than the color.
This is exactly the kind of thing I need to focus on more. I don't usually think about how the lighting would effect skin, so I go off and paint it blindly,with no understanding of what I'm trying to achieve. Thank you very much for sharing this, it will come in very handy
Thank you for writing this, it is neat to see this actually written down and explained directly. I think that you did a great job of it, and that this gave a great written explanation to something quite difficult to explain.
I do have one question for you though, for paining digitally, what sort of brush (or brushes) do you use, and what sort of technique do you use to attain the texture of the skin?
Thank you both for the tutorial here on skin colors, and any answers you are able to give you my question.
Hi, I use a hard round brush with no opacity variable to put on an under color, like green or blue or red depending on the light and subject, with medium to dark value. Then I work over with opacity variable set on pen pressure and add an "external" skin color that is more yellow or pink and has a lighter value and use the opacity to get the transparency of the skin and the volume. For smoothing I use the same brush as the smudge tool with a little scattering setting(around 20%) that help blending the colors at the flat places like the cheeks or the forehead. If you're new to the smudge tool, quick tips: never set the strength on 100%. Set between 70 and 50%. Never use on edges of a shape, it screw the thing away. Don't overuse it, it flatten everything or turn it to plastic. Use it just a little bit with keeping brush strokes visible, only use it for the clean flat volumes, the inside of the shapes and not in every of them, otherwise it's too visible and seems unnaturally smooth.